/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:16:29,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:16:29,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:16:29,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:16:29,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:16:29,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:16:29,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:16:29,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:16:29,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:16:29,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:16:29,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:16:29,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:16:29,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:16:29,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:16:29,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:16:29,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:16:29,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:16:29,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:16:29,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:16:29,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:16:29,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:16:29,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:16:29,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:16:29,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:16:29,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:16:29,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:16:29,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:16:29,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:16:29,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:16:29,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:16:29,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:16:29,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:16:29,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:16:29,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:16:29,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:16:29,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:16:29,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:16:29,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:16:29,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:16:29,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:16:29,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:16:29,877 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 04:16:29,904 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:16:29,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:16:29,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:16:29,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:16:29,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:16:29,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:16:29,906 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:16:29,907 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:16:29,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:16:29,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:16:29,907 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:16:29,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:16:29,907 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:16:29,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:16:29,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:16:29,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:16:29,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:16:29,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:16:30,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:16:30,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:16:30,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:16:30,067 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:16:30,068 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:16:30,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label58.c [2023-04-01 04:16:31,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:16:31,555 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:16:31,555 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label58.c [2023-04-01 04:16:31,579 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/584d5652d/6979af16fb8c4042baab5c330cc0094a/FLAG08684cf3f [2023-04-01 04:16:31,589 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/584d5652d/6979af16fb8c4042baab5c330cc0094a [2023-04-01 04:16:31,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:16:31,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:16:31,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:16:31,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:16:31,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:16:31,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:16:31" (1/1) ... [2023-04-01 04:16:31,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1cd893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:31, skipping insertion in model container [2023-04-01 04:16:31,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:16:31" (1/1) ... [2023-04-01 04:16:31,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:16:31,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:16:31,774 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_label58.c[6184,6197] [2023-04-01 04:16:32,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:16:32,104 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:16:32,131 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_label58.c[6184,6197] [2023-04-01 04:16:32,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:16:32,288 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:16:32,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32 WrapperNode [2023-04-01 04:16:32,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:16:32,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:16:32,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:16:32,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:16:32,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,400 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:16:32,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:16:32,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:16:32,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:16:32,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (1/1) ... [2023-04-01 04:16:32,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:16:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:16:32,470 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 04:16:32,471 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 04:16:32,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:16:32,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:16:32,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:16:32,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:16:32,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:16:32,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:16:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:16:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:16:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:16:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:16:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:16:32,598 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:16:32,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:16:34,856 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:16:35,433 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:16:35,434 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:16:35,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:16:35 BoogieIcfgContainer [2023-04-01 04:16:35,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:16:35,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:16:35,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:16:35,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:16:35,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:16:31" (1/3) ... [2023-04-01 04:16:35,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b827176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:16:35, skipping insertion in model container [2023-04-01 04:16:35,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:32" (2/3) ... [2023-04-01 04:16:35,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b827176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:16:35, skipping insertion in model container [2023-04-01 04:16:35,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:16:35" (3/3) ... [2023-04-01 04:16:35,441 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label58.c [2023-04-01 04:16:35,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:16:35,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:16:35,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:16:35,493 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;@5d83a51a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:16:35,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:16:35,497 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) [2023-04-01 04:16:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:16:35,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:35,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:16:35,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:35,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash 271523846, now seen corresponding path program 1 times [2023-04-01 04:16:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278666924] [2023-04-01 04:16:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:35,810 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 04:16:35,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278666924] [2023-04-01 04:16:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278666924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:35,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:16:35,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328024196] [2023-04-01 04:16:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:35,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:16:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:16:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:16:35,862 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) [2023-04-01 04:16:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:38,069 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:16:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:16:38,072 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 04:16:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:38,086 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:16:38,087 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:16:38,095 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 04:16:38,100 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:38,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:16:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:16:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:16:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 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) [2023-04-01 04:16:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:16:38,211 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:16:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:38,226 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:16:38,226 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 04:16:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:16:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:16:38,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:38,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:16:38,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:16:38,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:38,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:38,229 INFO L85 PathProgramCache]: Analyzing trace with hash -266936966, now seen corresponding path program 1 times [2023-04-01 04:16:38,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:38,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354806186] [2023-04-01 04:16:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:38,492 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 04:16:38,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:38,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354806186] [2023-04-01 04:16:38,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354806186] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:38,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:38,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:16:38,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239322662] [2023-04-01 04:16:38,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:38,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:16:38,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:16:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:16:38,496 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:16:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:40,659 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-04-01 04:16:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:16:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:16:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:40,667 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 04:16:40,668 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 04:16:40,668 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 04:16:40,669 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 746 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:40,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 48 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:16:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 04:16:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-04-01 04:16:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4923245614035088) internal successors, (1361), 916 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 04:16:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1396 transitions. [2023-04-01 04:16:40,710 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1396 transitions. Word has length 23 [2023-04-01 04:16:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:40,710 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1396 transitions. [2023-04-01 04:16:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:16:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1396 transitions. [2023-04-01 04:16:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 04:16:40,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:40,712 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] [2023-04-01 04:16:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:16:40,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:40,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 348285823, now seen corresponding path program 1 times [2023-04-01 04:16:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:40,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767800602] [2023-04-01 04:16:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:40,884 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 04:16:40,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:40,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767800602] [2023-04-01 04:16:40,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767800602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:40,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:40,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:16:40,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485410366] [2023-04-01 04:16:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:40,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:16:40,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:16:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:16:40,890 INFO L87 Difference]: Start difference. First operand 932 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 04:16:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:42,668 INFO L93 Difference]: Finished difference Result 2838 states and 4328 transitions. [2023-04-01 04:16:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:16:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-01 04:16:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:42,682 INFO L225 Difference]: With dead ends: 2838 [2023-04-01 04:16:42,682 INFO L226 Difference]: Without dead ends: 1911 [2023-04-01 04:16:42,687 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 04:16:42,689 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:42,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:16:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-04-01 04:16:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1660. [2023-04-01 04:16:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1613 states have (on average 1.3415995040297581) internal successors, (2164), 1634 states have internal predecessors, (2164), 13 states have call successors, (13), 13 states have call predecessors, (13), 33 states have return successors, (74), 12 states have call predecessors, (74), 12 states have call successors, (74) [2023-04-01 04:16:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2251 transitions. [2023-04-01 04:16:42,750 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2251 transitions. Word has length 35 [2023-04-01 04:16:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:42,750 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2251 transitions. [2023-04-01 04:16:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 04:16:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2251 transitions. [2023-04-01 04:16:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 04:16:42,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:42,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:16:42,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:16:42,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:42,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1029587012, now seen corresponding path program 1 times [2023-04-01 04:16:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051875458] [2023-04-01 04:16:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:43,053 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 04:16:43,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051875458] [2023-04-01 04:16:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051875458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:43,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:43,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:16:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579420459] [2023-04-01 04:16:43,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:16:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:16:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:16:43,057 INFO L87 Difference]: Start difference. First operand 1660 states and 2251 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 04:16:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:44,401 INFO L93 Difference]: Finished difference Result 4244 states and 5972 transitions. [2023-04-01 04:16:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:16:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 152 [2023-04-01 04:16:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:44,414 INFO L225 Difference]: With dead ends: 4244 [2023-04-01 04:16:44,414 INFO L226 Difference]: Without dead ends: 2589 [2023-04-01 04:16:44,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:16:44,427 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:44,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:16:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2023-04-01 04:16:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2509. [2023-04-01 04:16:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2449 states have (on average 1.2670477746018782) internal successors, (3103), 2475 states have internal predecessors, (3103), 17 states have call successors, (17), 17 states have call predecessors, (17), 42 states have return successors, (137), 16 states have call predecessors, (137), 16 states have call successors, (137) [2023-04-01 04:16:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3257 transitions. [2023-04-01 04:16:44,492 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3257 transitions. Word has length 152 [2023-04-01 04:16:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:44,495 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3257 transitions. [2023-04-01 04:16:44,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 04:16:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3257 transitions. [2023-04-01 04:16:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 04:16:44,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:44,503 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:16:44,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:16:44,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:44,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash -3550068, now seen corresponding path program 1 times [2023-04-01 04:16:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313402028] [2023-04-01 04:16:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:16:44,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313402028] [2023-04-01 04:16:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313402028] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:16:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362828019] [2023-04-01 04:16:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:44,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:16:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:16:44,889 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 04:16:44,924 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 04:16:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:45,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:16:45,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:16:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:16:45,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:16:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:16:45,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362828019] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:16:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672053158] [2023-04-01 04:16:45,289 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:16:45,289 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:16:45,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:16:45,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:16:45,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:16:45,408 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:16:45,691 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2023-04-01 04:16:50,547 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 59465 conjuctions. This might take some time... [2023-04-01 04:16:55,109 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1161 conjuctions. [2023-04-01 04:16:58,892 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17