/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:10:44,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:10:44,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:10:44,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:10:44,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:10:44,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:10:44,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:10:44,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:10:44,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:10:44,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:10:44,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:10:44,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:10:44,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:10:44,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:10:44,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:10:44,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:10:44,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:10:44,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:10:44,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:10:44,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:10:44,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:10:44,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:10:44,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:10:44,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:10:44,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:10:44,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:10:44,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:10:44,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:10:44,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:10:44,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:10:44,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:10:44,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:10:44,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:10:44,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:10:44,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:10:44,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:10:44,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:10:44,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:10:44,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:10:44,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:10:44,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:10:44,904 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 [2023-03-31 22:10:44,929 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:10:44,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:10:44,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:10:44,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:10:44,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:10:44,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:10:44,930 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:10:44,930 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:10:44,930 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:10:44,930 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:10:44,931 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:10:44,931 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:10:44,931 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:10:44,931 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:10:44,931 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:10:44,931 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:10:44,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:10:44,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:10:44,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:44,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:10:44,933 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:10:44,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:10:44,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:10:44,934 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:10:44,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:10:44,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:10:44,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:10:44,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:10:45,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:10:45,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:10:45,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:10:45,111 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:10:45,112 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:10:45,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label04.c [2023-03-31 22:10:46,177 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:10:46,482 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:10:46,482 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label04.c [2023-03-31 22:10:46,494 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c7a9402/06ea56453dcb4cb9a373494e77d9cca9/FLAGad7d1696f [2023-03-31 22:10:46,506 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c7a9402/06ea56453dcb4cb9a373494e77d9cca9 [2023-03-31 22:10:46,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:10:46,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:10:46,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:46,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:10:46,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:10:46,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:46" (1/1) ... [2023-03-31 22:10:46,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d8ffe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:46, skipping insertion in model container [2023-03-31 22:10:46,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:46" (1/1) ... [2023-03-31 22:10:46,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:10:46,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:10:46,687 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/Problem15_label04.c[3915,3928] [2023-03-31 22:10:46,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:46,952 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:10:46,979 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/Problem15_label04.c[3915,3928] [2023-03-31 22:10:47,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:47,133 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:10:47,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47 WrapperNode [2023-03-31 22:10:47,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:47,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:10:47,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:10:47,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:10:47,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,265 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:10:47,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:10:47,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:10:47,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:10:47,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (1/1) ... [2023-03-31 22:10:47,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:47,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:47,308 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) [2023-03-31 22:10:47,326 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 [2023-03-31 22:10:47,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:10:47,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:10:47,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:10:47,336 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:10:47,336 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:10:47,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:10:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:10:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:10:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:10:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:10:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:10:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:10:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:10:47,384 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:10:47,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:10:49,093 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:10:49,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:10:49,565 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:10:49,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:49 BoogieIcfgContainer [2023-03-31 22:10:49,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:10:49,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:10:49,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:10:49,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:10:49,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:10:46" (1/3) ... [2023-03-31 22:10:49,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c09a74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:49, skipping insertion in model container [2023-03-31 22:10:49,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:47" (2/3) ... [2023-03-31 22:10:49,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c09a74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:49, skipping insertion in model container [2023-03-31 22:10:49,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:49" (3/3) ... [2023-03-31 22:10:49,572 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label04.c [2023-03-31 22:10:49,584 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:10:49,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:10:49,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:10:49,621 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;@6777372f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:10:49,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:10:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:10:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:10:49,629 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:49,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:49,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:49,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash 271516099, now seen corresponding path program 1 times [2023-03-31 22:10:49,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:49,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992486780] [2023-03-31 22:10:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:49,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:49,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:49,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992486780] [2023-03-31 22:10:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992486780] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:49,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:49,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:49,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856121784] [2023-03-31 22:10:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:49,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:49,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:49,867 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:10:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:51,196 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:10:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:51,197 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 [2023-03-31 22:10:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:51,207 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:10:51,207 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:10:51,211 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 [2023-03-31 22:10:51,213 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:51,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:10:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:10:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:10:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:10:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-03-31 22:10:51,273 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-03-31 22:10:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:51,274 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-03-31 22:10:51,274 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) [2023-03-31 22:10:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-03-31 22:10:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:10:51,275 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:51,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:10:51,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:51,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -812402627, now seen corresponding path program 1 times [2023-03-31 22:10:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013047326] [2023-03-31 22:10:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:51,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:51,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013047326] [2023-03-31 22:10:51,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013047326] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:51,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:51,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:51,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815472968] [2023-03-31 22:10:51,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:51,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:51,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:51,453 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-03-31 22:10:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:52,659 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-03-31 22:10:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 21 [2023-03-31 22:10:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:52,669 INFO L225 Difference]: With dead ends: 1395 [2023-03-31 22:10:52,669 INFO L226 Difference]: Without dead ends: 931 [2023-03-31 22:10:52,672 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 [2023-03-31 22:10:52,673 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:52,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:10:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-03-31 22:10:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-03-31 22:10:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-03-31 22:10:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-03-31 22:10:52,786 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-03-31 22:10:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:52,786 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-03-31 22:10:52,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-03-31 22:10:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-03-31 22:10:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 22:10:52,789 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:52,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:52,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:10:52,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:52,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 443615386, now seen corresponding path program 1 times [2023-03-31 22:10:52,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:52,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536233223] [2023-03-31 22:10:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:52,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-31 22:10:53,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:53,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536233223] [2023-03-31 22:10:53,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536233223] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:53,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:53,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:10:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443053023] [2023-03-31 22:10:53,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:53,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:10:53,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:10:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:10:53,025 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:10:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:54,751 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-03-31 22:10:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:10:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-03-31 22:10:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:54,759 INFO L225 Difference]: With dead ends: 2350 [2023-03-31 22:10:54,759 INFO L226 Difference]: Without dead ends: 1426 [2023-03-31 22:10:54,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:10:54,763 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:54,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:10:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-03-31 22:10:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-03-31 22:10:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-03-31 22:10:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-03-31 22:10:54,797 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-03-31 22:10:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:54,798 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-03-31 22:10:54,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:10:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-03-31 22:10:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 22:10:54,802 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:54,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:10:54,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:54,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1340038034, now seen corresponding path program 1 times [2023-03-31 22:10:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559401] [2023-03-31 22:10:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:10:55,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:55,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559401] [2023-03-31 22:10:55,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559401] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736893527] [2023-03-31 22:10:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:55,105 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2023-03-31 22:10:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:56,356 INFO L93 Difference]: Finished difference Result 3496 states and 4706 transitions. [2023-03-31 22:10:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 173 [2023-03-31 22:10:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:56,366 INFO L225 Difference]: With dead ends: 3496 [2023-03-31 22:10:56,366 INFO L226 Difference]: Without dead ends: 2098 [2023-03-31 22:10:56,369 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 [2023-03-31 22:10:56,376 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:56,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:10:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-03-31 22:10:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868. [2023-03-31 22:10:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57) [2023-03-31 22:10:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions. [2023-03-31 22:10:56,427 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173 [2023-03-31 22:10:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:56,428 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions. [2023-03-31 22:10:56,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2023-03-31 22:10:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions. [2023-03-31 22:10:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-31 22:10:56,431 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:56,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:56,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:10:56,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:56,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1890764074, now seen corresponding path program 1 times [2023-03-31 22:10:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:56,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785913387] [2023-03-31 22:10:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:56,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785913387] [2023-03-31 22:10:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785913387] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507983205] [2023-03-31 22:10:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:56,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:10:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:56,727 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) [2023-03-31 22:10:56,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:10:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:56,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:10:56,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:10:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:56,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:10:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:57,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507983205] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:10:57,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370237152] [2023-03-31 22:10:57,172 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:10:57,173 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:10:57,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:10:57,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:10:57,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:10:57,276 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:10:57,518 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-03-31 22:10:57,728 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2023-03-31 22:10:57,945 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 11704 conjuctions. This might take some time... [2023-03-31 22:10:58,083 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 160 conjuctions. [2023-03-31 22:10:58,800 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:10:58,864 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-03-31 22:11:17,366 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36