/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:30:20,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:30:20,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:30:20,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:30:20,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:30:20,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:30:20,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:30:20,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:30:20,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:30:20,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:30:20,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:30:20,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:30:20,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:30:20,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:30:20,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:30:20,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:30:20,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:30:20,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:30:20,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:30:20,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:30:20,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:30:20,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:30:20,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:30:20,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:30:20,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:30:20,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:30:20,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:30:20,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:30:20,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:30:20,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:30:20,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:30:20,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:30:20,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:30:20,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:30:20,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:30:21,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:30:21,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:30:21,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:30:21,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:30:21,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:30:21,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:30:21,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:30:21,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:30:21,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:30:21,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:30:21,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:30:21,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:30:21,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:30:21,037 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:30:21,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:30:21,037 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:30:21,037 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:30:21,038 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:30:21,038 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:30:21,038 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:30:21,038 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:30:21,039 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:30:21,039 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:30:21,039 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:30:21,039 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:30:21,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:30:21,040 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:30:21,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:30:21,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:30:21,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:30:21,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:30:21,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:30:21,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:30:21,041 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:30:21,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:30:21,041 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:30:21,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:30:21,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:30:21,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:30:21,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:30:21,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:30:21,042 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:30:21,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:30:21,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:30:21,043 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:30:21,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:30:21,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:30:21,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:30:21,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:30:21,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:30:21,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:30:21,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:30:21,323 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:30:21,323 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:30:21,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label14.c [2023-03-31 22:30:22,575 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:30:23,096 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:30:23,096 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label14.c [2023-03-31 22:30:23,142 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914a91a7c/2395456c2fde48f5a55f662655cd32ba/FLAG27689f04d [2023-03-31 22:30:23,159 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914a91a7c/2395456c2fde48f5a55f662655cd32ba [2023-03-31 22:30:23,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:30:23,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:30:23,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:30:23,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:30:23,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:30:23,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:30:23" (1/1) ... [2023-03-31 22:30:23,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e477016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:23, skipping insertion in model container [2023-03-31 22:30:23,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:30:23" (1/1) ... [2023-03-31 22:30:23,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:30:23,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:30:23,572 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_label14.c[2035,2048] [2023-03-31 22:30:24,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:30:24,697 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:30:24,723 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_label14.c[2035,2048] [2023-03-31 22:30:25,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:30:25,491 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:30:25,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25 WrapperNode [2023-03-31 22:30:25,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:30:25,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:30:25,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:30:25,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:30:25,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,815 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:30:25,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:30:25,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:30:25,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:30:25,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (1/1) ... [2023-03-31 22:30:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:30:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:30:25,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:30:25,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:30:25,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:30:25,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:30:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:30:25,973 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:30:25,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:30:25,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:30:25,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:30:25,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:30:25,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:30:25,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:30:26,048 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:30:26,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:30:33,383 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:30:47,578 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:30:47,579 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:30:47,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:47 BoogieIcfgContainer [2023-03-31 22:30:47,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:30:47,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:30:47,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:30:47,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:30:47,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:30:23" (1/3) ... [2023-03-31 22:30:47,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab504a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:47, skipping insertion in model container [2023-03-31 22:30:47,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:30:25" (2/3) ... [2023-03-31 22:30:47,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab504a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:47, skipping insertion in model container [2023-03-31 22:30:47,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:47" (3/3) ... [2023-03-31 22:30:47,591 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label14.c [2023-03-31 22:30:47,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:30:47,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:30:47,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:30:47,681 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;@3687aa1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:30:47,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:30:47,692 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) [2023-03-31 22:30:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:30:47,699 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:47,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:30:47,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:47,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1235639771, now seen corresponding path program 1 times [2023-03-31 22:30:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:47,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805009791] [2023-03-31 22:30:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:47,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:48,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805009791] [2023-03-31 22:30:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805009791] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:48,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:30:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049251943] [2023-03-31 22:30:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:30:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:30:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:30:48,185 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) [2023-03-31 22:30:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:54,150 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:30:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:30:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:30:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:54,175 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:30:54,176 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:30:54,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:30:54,187 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:54,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-03-31 22:30:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:30:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-03-31 22:30:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 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) [2023-03-31 22:30:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-03-31 22:30:54,339 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-03-31 22:30:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:54,340 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-03-31 22:30:54,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:30:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-03-31 22:30:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:30:54,342 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:54,342 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] [2023-03-31 22:30:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:30:54,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:54,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1025370201, now seen corresponding path program 1 times [2023-03-31 22:30:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:54,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601186840] [2023-03-31 22:30:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:54,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:54,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601186840] [2023-03-31 22:30:54,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601186840] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:54,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:54,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:30:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971573445] [2023-03-31 22:30:54,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:54,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:54,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:54,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:54,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:30:54,537 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-03-31 22:31:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:02,261 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-03-31 22:31:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:31:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-03-31 22:31:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:02,282 INFO L225 Difference]: With dead ends: 6869 [2023-03-31 22:31:02,282 INFO L226 Difference]: Without dead ends: 4605 [2023-03-31 22:31:02,287 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 [2023-03-31 22:31:02,288 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:02,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-03-31 22:31:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-03-31 22:31:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-03-31 22:31:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-03-31 22:31:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-03-31 22:31:02,399 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-03-31 22:31:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:02,400 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-03-31 22:31:02,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-03-31 22:31:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-03-31 22:31:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:31:02,401 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:02,401 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] [2023-03-31 22:31:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:31:02,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:02,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash -912119855, now seen corresponding path program 1 times [2023-03-31 22:31:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:02,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156532840] [2023-03-31 22:31:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:02,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:31:02,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156532840] [2023-03-31 22:31:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156532840] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:02,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:02,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281265657] [2023-03-31 22:31:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:02,594 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-03-31 22:31:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:09,968 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-03-31 22:31:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:31:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-03-31 22:31:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:10,011 INFO L225 Difference]: With dead ends: 13013 [2023-03-31 22:31:10,011 INFO L226 Difference]: Without dead ends: 8446 [2023-03-31 22:31:10,022 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 [2023-03-31 22:31:10,023 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3802 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6860 mSolverCounterSat, 1740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3802 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1740 IncrementalHoareTripleChecker+Valid, 6860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:10,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3802 Valid, 183 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1740 Valid, 6860 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-03-31 22:31:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-03-31 22:31:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-03-31 22:31:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-03-31 22:31:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-03-31 22:31:10,253 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-03-31 22:31:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:10,253 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-03-31 22:31:10,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-03-31 22:31:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-03-31 22:31:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:31:10,255 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:10,255 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] [2023-03-31 22:31:10,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:31:10,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:10,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -390666423, now seen corresponding path program 1 times [2023-03-31 22:31:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:10,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896383775] [2023-03-31 22:31:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:10,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:31:10,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896383775] [2023-03-31 22:31:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896383775] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:10,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600826797] [2023-03-31 22:31:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:10,395 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)