/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/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:16:04,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:16:04,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:16:04,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:16:04,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:16:04,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:16:04,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:16:04,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:16:04,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:16:04,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:16:04,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:16:04,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:16:04,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:16:04,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:16:04,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:16:04,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:16:04,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:16:04,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:16:04,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:16:04,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:16:04,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:16:04,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:16:04,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:16:04,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:16:04,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:16:04,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:16:04,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:16:04,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:16:04,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:16:04,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:16:04,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:16:04,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:16:04,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:16:04,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:16:04,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:16:04,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:16:04,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:16:04,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:16:04,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:16:04,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:16:04,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:16:04,980 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 10:16:05,009 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:16:05,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:16:05,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:16:05,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:16:05,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:16:05,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:16:05,012 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:16:05,012 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:16:05,012 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:16:05,012 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:16:05,013 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:16:05,013 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:16:05,013 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:16:05,013 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:16:05,014 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:16:05,014 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:16:05,014 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:16:05,014 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:16:05,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:16:05,015 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:16:05,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:16:05,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:16:05,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:16:05,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:16:05,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:16:05,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:16:05,017 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:16:05,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:16:05,017 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:16:05,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:16:05,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:16:05,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:16:05,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:16:05,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:16:05,018 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:16:05,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:16:05,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:16:05,018 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:16:05,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:16:05,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:16:05,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:16:05,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:16:05,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:16:05,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:16:05,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:16:05,282 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:16:05,283 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:16:05,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label14.c [2023-04-01 10:16:06,503 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:16:06,853 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:16:06,854 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label14.c [2023-04-01 10:16:06,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f47e479/0fda115efba54cbb82d00d689a7481d4/FLAG86ca0262d [2023-04-01 10:16:06,887 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f47e479/0fda115efba54cbb82d00d689a7481d4 [2023-04-01 10:16:06,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:16:06,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:16:06,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:16:06,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:16:06,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:16:06,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:16:06" (1/1) ... [2023-04-01 10:16:06,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b339e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:06, skipping insertion in model container [2023-04-01 10:16:06,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:16:06" (1/1) ... [2023-04-01 10:16:06,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:16:06,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:16:07,146 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_label14.c[2008,2021] [2023-04-01 10:16:07,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:16:07,620 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:16:07,644 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_label14.c[2008,2021] [2023-04-01 10:16:07,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:16:07,845 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:16:07,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07 WrapperNode [2023-04-01 10:16:07,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:16:07,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:16:07,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:16:07,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:16:07,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:07,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:07,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:07,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:07,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:07,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:07,992 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:08,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:08,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:16:08,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:16:08,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:16:08,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:16:08,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (1/1) ... [2023-04-01 10:16:08,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:16:08,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:08,065 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 10:16:08,088 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 10:16:08,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:16:08,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:16:08,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:16:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:16:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:16:08,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:16:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:16:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:16:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:16:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:16:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:16:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:16:08,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:16:08,174 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:16:08,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:16:10,451 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:16:11,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:16:11,183 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:16:11,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:16:11 BoogieIcfgContainer [2023-04-01 10:16:11,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:16:11,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:16:11,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:16:11,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:16:11,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:16:06" (1/3) ... [2023-04-01 10:16:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea46813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:16:11, skipping insertion in model container [2023-04-01 10:16:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:07" (2/3) ... [2023-04-01 10:16:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea46813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:16:11, skipping insertion in model container [2023-04-01 10:16:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:16:11" (3/3) ... [2023-04-01 10:16:11,195 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2023-04-01 10:16:11,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:16:11,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:16:11,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:16:11,280 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;@c3be4bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:16:11,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:16:11,286 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 10:16:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:16:11,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:11,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:11,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:11,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:11,301 INFO L85 PathProgramCache]: Analyzing trace with hash 271512003, now seen corresponding path program 1 times [2023-04-01 10:16:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:11,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204790560] [2023-04-01 10:16:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:11,594 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 10:16:11,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:11,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204790560] [2023-04-01 10:16:11,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204790560] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:11,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377880144] [2023-04-01 10:16:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:11,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:11,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:11,641 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 10:16:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:13,503 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:16:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:13,505 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 10:16:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:13,519 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:16:13,520 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:16:13,525 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 10:16:13,528 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:16:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:16:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:16:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:16:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 10:16:13,592 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 10:16:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:13,593 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 10:16:13,593 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 10:16:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 10:16:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:16:13,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:13,594 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 10:16:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:16:13,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:13,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash -155125571, now seen corresponding path program 1 times [2023-04-01 10:16:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333592063] [2023-04-01 10:16:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:13,828 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 10:16:13,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:13,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333592063] [2023-04-01 10:16:13,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333592063] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:13,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:13,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893856668] [2023-04-01 10:16:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:13,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:13,836 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:16:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:15,392 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-04-01 10:16:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:15,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 10:16:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:15,399 INFO L225 Difference]: With dead ends: 1395 [2023-04-01 10:16:15,399 INFO L226 Difference]: Without dead ends: 931 [2023-04-01 10:16:15,400 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 10:16:15,402 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:15,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:16:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-01 10:16:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-04-01 10:16:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 10:16:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-04-01 10:16:15,446 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-04-01 10:16:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:15,446 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-04-01 10:16:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:16:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-04-01 10:16:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 10:16:15,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:15,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:16:15,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:15,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1627920794, now seen corresponding path program 1 times [2023-04-01 10:16:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:15,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021998690] [2023-04-01 10:16:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:15,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 10:16:15,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:15,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021998690] [2023-04-01 10:16:15,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021998690] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:15,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:15,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:16:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088677741] [2023-04-01 10:16:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:16:15,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:16:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:16:15,845 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:16:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:17,969 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-04-01 10:16:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:16:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-04-01 10:16:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:17,978 INFO L225 Difference]: With dead ends: 2350 [2023-04-01 10:16:17,979 INFO L226 Difference]: Without dead ends: 1426 [2023-04-01 10:16:17,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:16:17,987 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:17,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 10:16:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-04-01 10:16:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-04-01 10:16:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-04-01 10:16:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-04-01 10:16:18,047 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-04-01 10:16:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:18,047 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-04-01 10:16:18,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:16:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-04-01 10:16:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 10:16:18,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:18,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:16:18,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:18,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -370246766, now seen corresponding path program 1 times [2023-04-01 10:16:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:18,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237902007] [2023-04-01 10:16:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:16:18,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:18,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237902007] [2023-04-01 10:16:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237902007] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:18,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:18,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614309464] [2023-04-01 10:16:18,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:18,533 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:16:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:20,544 INFO L93 Difference]: Finished difference Result 3267 states and 4405 transitions. [2023-04-01 10:16:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-01 10:16:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:20,553 INFO L225 Difference]: With dead ends: 3267 [2023-04-01 10:16:20,554 INFO L226 Difference]: Without dead ends: 1869 [2023-04-01 10:16:20,557 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 10:16:20,557 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 269 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:20,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 312 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:16:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2023-04-01 10:16:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1862. [2023-04-01 10:16:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1827 states have (on average 1.3355227148330597) internal successors, (2440), 1834 states have internal predecessors, (2440), 14 states have call successors, (14), 14 states have call predecessors, (14), 20 states have return successors, (50), 13 states have call predecessors, (50), 13 states have call successors, (50) [2023-04-01 10:16:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2504 transitions. [2023-04-01 10:16:20,640 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2504 transitions. Word has length 173 [2023-04-01 10:16:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:20,641 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2504 transitions. [2023-04-01 10:16:20,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:16:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2504 transitions. [2023-04-01 10:16:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 10:16:20,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:20,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:20,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:16:20,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:20,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1617940451, now seen corresponding path program 1 times [2023-04-01 10:16:20,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:20,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952622515] [2023-04-01 10:16:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:20,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 10:16:21,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952622515] [2023-04-01 10:16:21,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952622515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:21,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:21,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:21,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904346306] [2023-04-01 10:16:21,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:21,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:21,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:21,029 INFO L87 Difference]: Start difference. First operand 1862 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:16:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:22,475 INFO L93 Difference]: Finished difference Result 4185 states and 5767 transitions. [2023-04-01 10:16:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 188 [2023-04-01 10:16:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:22,486 INFO L225 Difference]: With dead ends: 4185 [2023-04-01 10:16:22,486 INFO L226 Difference]: Without dead ends: 2328 [2023-04-01 10:16:22,495 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 10:16:22,500 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 233 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:22,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 172 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 10:16:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2023-04-01 10:16:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2099. [2023-04-01 10:16:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2060 states have (on average 1.3233009708737864) internal successors, (2726), 2067 states have internal predecessors, (2726), 16 states have call successors, (16), 16 states have call predecessors, (16), 22 states have return successors, (65), 15 states have call predecessors, (65), 15 states have call successors, (65) [2023-04-01 10:16:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2807 transitions. [2023-04-01 10:16:22,586 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2807 transitions. Word has length 188 [2023-04-01 10:16:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:22,588 INFO L495 AbstractCegarLoop]: Abstraction has 2099 states and 2807 transitions. [2023-04-01 10:16:22,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:16:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2807 transitions. [2023-04-01 10:16:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-04-01 10:16:22,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:22,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:22,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:16:22,592 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:22,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1327889141, now seen corresponding path program 1 times [2023-04-01 10:16:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:22,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87873845] [2023-04-01 10:16:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:22,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87873845] [2023-04-01 10:16:22,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87873845] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:16:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635351967] [2023-04-01 10:16:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:22,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:16:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:22,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:16:22,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:16:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:23,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:16:23,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:16:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:23,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:16:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635351967] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:16:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251608461] [2023-04-01 10:16:23,448 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:16:23,448 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:16:23,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:16:23,456 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:16:23,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:16:23,751 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:16:24,172 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 10:16:29,931 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 52