/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:35:01,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:35:01,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:35:02,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:35:02,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:35:02,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:35:02,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:35:02,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:35:02,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:35:02,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:35:02,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:35:02,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:35:02,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:35:02,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:35:02,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:35:02,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:35:02,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:35:02,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:35:02,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:35:02,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:35:02,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:35:02,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:35:02,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:35:02,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:35:02,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:35:02,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:35:02,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:35:02,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:35:02,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:35:02,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:35:02,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:35:02,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:35:02,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:35:02,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:35:02,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:35:02,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:35:02,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:35:02,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:35:02,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:35:02,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:35:02,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:35:02,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:35:02,103 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:35:02,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:35:02,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:35:02,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:35:02,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:35:02,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:35:02,105 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:35:02,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:35:02,105 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:35:02,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:35:02,106 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:35:02,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:35:02,106 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:35:02,106 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:35:02,106 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:35:02,107 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:35:02,107 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:35:02,107 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:35:02,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:35:02,107 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:35:02,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:35:02,108 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:35:02,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:35:02,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:35:02,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:35:02,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:35:02,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:35:02,109 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:35:02,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:35:02,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:35:02,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:35:02,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:35:02,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:35:02,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:35:02,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:35:02,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:35:02,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:35:02,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:35:02,332 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:35:02,334 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:35:02,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label29.c [2023-04-01 10:35:03,447 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:35:04,031 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:35:04,032 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label29.c [2023-04-01 10:35:04,073 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cd9aa8c/47956eb0039248acb434ad2de7ba50d3/FLAG65ef913c3 [2023-04-01 10:35:04,086 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cd9aa8c/47956eb0039248acb434ad2de7ba50d3 [2023-04-01 10:35:04,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:35:04,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:35:04,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:35:04,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:35:04,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:35:04,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:35:04" (1/1) ... [2023-04-01 10:35:04,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b69ba78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:04, skipping insertion in model container [2023-04-01 10:35:04,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:35:04" (1/1) ... [2023-04-01 10:35:04,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:35:04,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:35:04,560 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/Problem19_label29.c[3135,3148] [2023-04-01 10:35:05,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:35:05,662 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:35:05,689 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/Problem19_label29.c[3135,3148] [2023-04-01 10:35:06,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:35:06,415 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:35:06,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06 WrapperNode [2023-04-01 10:35:06,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:35:06,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:35:06,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:35:06,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:35:06,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:35:06,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:35:06,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:35:06,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:35:06,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (1/1) ... [2023-04-01 10:35:06,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:35:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:06,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:35:06,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:35:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:35:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:35:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:35:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:35:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:35:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:35:06,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:35:06,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:35:06,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:35:06,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:35:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:35:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:35:07,098 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:35:07,100 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:35:14,575 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:35:28,919 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:35:28,919 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:35:28,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:35:28 BoogieIcfgContainer [2023-04-01 10:35:28,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:35:28,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:35:28,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:35:28,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:35:28,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:35:04" (1/3) ... [2023-04-01 10:35:28,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f860f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:35:28, skipping insertion in model container [2023-04-01 10:35:28,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:06" (2/3) ... [2023-04-01 10:35:28,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f860f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:35:28, skipping insertion in model container [2023-04-01 10:35:28,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:35:28" (3/3) ... [2023-04-01 10:35:28,932 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label29.c [2023-04-01 10:35:28,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:35:28,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:35:29,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:35:29,018 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;@5928e11c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:35:29,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:35:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:35:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:35:29,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:29,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:29,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:29,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1235895779, now seen corresponding path program 1 times [2023-04-01 10:35:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:29,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113257698] [2023-04-01 10:35:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:35:29,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113257698] [2023-04-01 10:35:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113257698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:35:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931941526] [2023-04-01 10:35:29,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:29,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:35:29,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:29,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:35:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:35:29,413 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:35:35,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:35,475 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:35:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:35:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:35:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:35,514 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:35:35,514 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:35:35,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:35:35,532 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1291 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 1797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1797 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:35,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 251 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1797 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 10:35:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:35:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2267. [2023-04-01 10:35:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2241 states have (on average 1.892904953145917) internal successors, (4242), 2241 states have internal predecessors, (4242), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:35:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 4277 transitions. [2023-04-01 10:35:35,676 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 4277 transitions. Word has length 11 [2023-04-01 10:35:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:35,677 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 4277 transitions. [2023-04-01 10:35:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:35:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 4277 transitions. [2023-04-01 10:35:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:35:35,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:35,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:35,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:35:35,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:35,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -237687903, now seen corresponding path program 1 times [2023-04-01 10:35:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:35,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239937235] [2023-04-01 10:35:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:35:35,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239937235] [2023-04-01 10:35:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239937235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:35,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795435449] [2023-04-01 10:35:35,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:35,986 INFO L87 Difference]: Start difference. First operand 2267 states and 4277 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:44,243 INFO L93 Difference]: Finished difference Result 6937 states and 13090 transitions. [2023-04-01 10:35:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 10:35:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:44,269 INFO L225 Difference]: With dead ends: 6937 [2023-04-01 10:35:44,269 INFO L226 Difference]: Without dead ends: 4675 [2023-04-01 10:35:44,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:44,278 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4003 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4003 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:44,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4003 Valid, 178 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 10:35:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2023-04-01 10:35:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4604. [2023-04-01 10:35:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4526 states have (on average 1.5733539549270878) internal successors, (7121), 4533 states have internal predecessors, (7121), 23 states have call successors, (23), 23 states have call predecessors, (23), 54 states have return successors, (142), 47 states have call predecessors, (142), 22 states have call successors, (142) [2023-04-01 10:35:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7286 transitions. [2023-04-01 10:35:44,425 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7286 transitions. Word has length 21 [2023-04-01 10:35:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:44,426 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 7286 transitions. [2023-04-01 10:35:44,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7286 transitions. [2023-04-01 10:35:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 10:35:44,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:44,427 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] [2023-04-01 10:35:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:35:44,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:44,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2053263854, now seen corresponding path program 1 times [2023-04-01 10:35:44,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:44,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085299346] [2023-04-01 10:35:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:44,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:35:44,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085299346] [2023-04-01 10:35:44,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085299346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:44,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417528054] [2023-04-01 10:35:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:44,544 INFO L87 Difference]: Start difference. First operand 4604 states and 7286 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:50,788 INFO L93 Difference]: Finished difference Result 12915 states and 21078 transitions. [2023-04-01 10:35:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:35:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 10:35:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:50,829 INFO L225 Difference]: With dead ends: 12915 [2023-04-01 10:35:50,830 INFO L226 Difference]: Without dead ends: 8316 [2023-04-01 10:35:50,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:50,848 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3658 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3658 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:50,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3658 Valid, 159 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 10:35:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8316 states. [2023-04-01 10:35:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 8220. [2023-04-01 10:35:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8029 states have (on average 1.5387968613775065) internal successors, (12355), 8053 states have internal predecessors, (12355), 38 states have call successors, (38), 38 states have call predecessors, (38), 152 states have return successors, (540), 128 states have call predecessors, (540), 37 states have call successors, (540) [2023-04-01 10:35:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 12933 transitions. [2023-04-01 10:35:51,059 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 12933 transitions. Word has length 24 [2023-04-01 10:35:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:51,060 INFO L495 AbstractCegarLoop]: Abstraction has 8220 states and 12933 transitions. [2023-04-01 10:35:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 12933 transitions. [2023-04-01 10:35:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:35:51,062 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:51,062 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] [2023-04-01 10:35:51,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:35:51,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:51,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1215669564, now seen corresponding path program 1 times [2023-04-01 10:35:51,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:51,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45990535] [2023-04-01 10:35:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:51,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:35:51,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45990535] [2023-04-01 10:35:51,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45990535] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:51,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:51,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077295119] [2023-04-01 10:35:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:51,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:51,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:51,230 INFO L87 Difference]: Start difference. First operand 8220 states and 12933 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:59,491 INFO L93 Difference]: Finished difference Result 24578 states and 39444 transitions. [2023-04-01 10:35:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-01 10:35:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:59,569 INFO L225 Difference]: With dead ends: 24578 [2023-04-01 10:35:59,569 INFO L226 Difference]: Without dead ends: 16363 [2023-04-01 10:35:59,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:59,602 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 3697 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7393 mSolverCounterSat, 1707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3697 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 9100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1707 IncrementalHoareTripleChecker+Valid, 7393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:59,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3697 Valid, 223 Invalid, 9100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1707 Valid, 7393 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 10:35:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16363 states.