/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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:31:46,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:31:46,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:31:46,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:31:46,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:31:46,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:31:46,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:31:46,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:31:46,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:31:46,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:31:46,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:31:46,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:31:46,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:31:46,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:31:46,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:31:46,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:31:46,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:31:46,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:31:46,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:31:46,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:31:46,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:31:46,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:31:46,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:31:46,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:31:46,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:31:46,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:31:46,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:31:46,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:31:46,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:31:46,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:31:46,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:31:46,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:31:46,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:31:46,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:31:46,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:31:46,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:31:46,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:31:46,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:31:46,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:31:46,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:31:46,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:31:46,934 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 22:31:46,964 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:31:46,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:31:46,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:31:46,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:31:46,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:31:46,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:31:46,966 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:31:46,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:31:46,966 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:31:46,966 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:31:46,967 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:31:46,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:31:46,967 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:31:46,968 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:31:46,968 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:31:46,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:31:46,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:31:46,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:31:46,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:31:46,969 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:31:46,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:31:46,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:31:46,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:31:46,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:31:46,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:31:46,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:31:46,970 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:31:46,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:31:46,971 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:31:46,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:31:46,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:31:46,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:31:46,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:31:46,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:31:46,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:31:46,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:31:47,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:31:47,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:31:47,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:31:47,236 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:31:47,237 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:31:47,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label34.c [2023-03-31 22:31:48,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:31:49,015 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:31:49,015 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label34.c [2023-03-31 22:31:49,074 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc19860a/81361dca789b44f1ba003c81d0b734b9/FLAGa551da028 [2023-03-31 22:31:49,090 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc19860a/81361dca789b44f1ba003c81d0b734b9 [2023-03-31 22:31:49,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:31:49,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:31:49,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:31:49,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:31:49,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:31:49,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:31:49" (1/1) ... [2023-03-31 22:31:49,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34627144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:49, skipping insertion in model container [2023-03-31 22:31:49,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:31:49" (1/1) ... [2023-03-31 22:31:49,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:31:49,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:31:49,619 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_label34.c[6640,6653] [2023-03-31 22:31:50,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:31:50,708 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:31:50,739 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_label34.c[6640,6653] [2023-03-31 22:31:51,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:31:51,481 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:31:51,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51 WrapperNode [2023-03-31 22:31:51,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:31:51,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:31:51,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:31:51,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:31:51,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:31:51,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:31:51,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:31:51,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:31:51,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (1/1) ... [2023-03-31 22:31:51,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:31:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:31:51,926 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 22:31:51,941 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 22:31:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:31:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:31:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:31:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:31:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:31:51,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:31:51,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:31:51,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:31:51,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:31:51,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:31:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:31:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:31:52,041 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:31:52,043 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:31:59,668 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:32:13,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:32:13,807 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:32:13,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:32:13 BoogieIcfgContainer [2023-03-31 22:32:13,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:32:13,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:32:13,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:32:13,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:32:13,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:31:49" (1/3) ... [2023-03-31 22:32:13,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc973c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:32:13, skipping insertion in model container [2023-03-31 22:32:13,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:51" (2/3) ... [2023-03-31 22:32:13,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc973c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:32:13, skipping insertion in model container [2023-03-31 22:32:13,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:32:13" (3/3) ... [2023-03-31 22:32:13,819 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label34.c [2023-03-31 22:32:13,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:32:13,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:32:13,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:32:13,919 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;@4447828a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:32:13,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:32:13,929 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 22:32:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:32:13,936 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:13,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:13,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:13,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1235903203, now seen corresponding path program 1 times [2023-03-31 22:32:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731884456] [2023-03-31 22:32:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:13,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:14,341 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 22:32:14,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:14,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731884456] [2023-03-31 22:32:14,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731884456] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:14,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:14,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:32:14,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532284058] [2023-03-31 22:32:14,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:32:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:32:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:32:14,378 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 22:32:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:20,414 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:32:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:32:20,417 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 22:32:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:20,438 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:32:20,438 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:32:20,447 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 22:32:20,450 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1159 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:20,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 156 Invalid, 4818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-31 22:32:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:32:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2229. [2023-03-31 22:32:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2203 states have (on average 1.9450748978665455) internal successors, (4285), 2203 states have internal predecessors, (4285), 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 22:32:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4320 transitions. [2023-03-31 22:32:20,584 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4320 transitions. Word has length 11 [2023-03-31 22:32:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:20,585 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4320 transitions. [2023-03-31 22:32:20,586 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 22:32:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4320 transitions. [2023-03-31 22:32:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:32:20,588 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:20,588 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 22:32:20,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:32:20,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:20,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1823283735, now seen corresponding path program 1 times [2023-03-31 22:32:20,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531533337] [2023-03-31 22:32:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:20,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:20,835 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 22:32:20,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:20,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531533337] [2023-03-31 22:32:20,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531533337] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:20,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:20,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568225060] [2023-03-31 22:32:20,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:20,838 INFO L87 Difference]: Start difference. First operand 2229 states and 4320 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 22:32:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:28,391 INFO L93 Difference]: Finished difference Result 6761 states and 13161 transitions. [2023-03-31 22:32:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:28,392 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 22:32:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:28,414 INFO L225 Difference]: With dead ends: 6761 [2023-03-31 22:32:28,414 INFO L226 Difference]: Without dead ends: 4537 [2023-03-31 22:32:28,420 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 22:32:28,421 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3858 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3858 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:28,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3858 Valid, 143 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 6431 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-31 22:32:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2023-03-31 22:32:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 4490. [2023-03-31 22:32:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4427 states have (on average 1.8599503049469166) internal successors, (8234), 4431 states have internal predecessors, (8234), 23 states have call successors, (23), 23 states have call predecessors, (23), 39 states have return successors, (116), 35 states have call predecessors, (116), 22 states have call successors, (116) [2023-03-31 22:32:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 8373 transitions. [2023-03-31 22:32:28,568 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 8373 transitions. Word has length 25 [2023-03-31 22:32:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:28,569 INFO L495 AbstractCegarLoop]: Abstraction has 4490 states and 8373 transitions. [2023-03-31 22:32:28,569 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 22:32:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 8373 transitions. [2023-03-31 22:32:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 22:32:28,570 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:28,570 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] [2023-03-31 22:32:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:32:28,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:28,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 228171777, now seen corresponding path program 1 times [2023-03-31 22:32:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804930207] [2023-03-31 22:32:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:28,742 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 22:32:28,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804930207] [2023-03-31 22:32:28,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804930207] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:28,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699924830] [2023-03-31 22:32:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:28,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:28,747 INFO L87 Difference]: Start difference. First operand 4490 states and 8373 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22:32:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:35,457 INFO L93 Difference]: Finished difference Result 12484 states and 23499 transitions. [2023-03-31 22:32:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-03-31 22:32:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:35,493 INFO L225 Difference]: With dead ends: 12484 [2023-03-31 22:32:35,493 INFO L226 Difference]: Without dead ends: 7999 [2023-03-31 22:32:35,506 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 22:32:35,509 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3880 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6366 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 6366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:35,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3880 Valid, 147 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 6366 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-03-31 22:32:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2023-03-31 22:32:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7941. [2023-03-31 22:32:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7809 states have (on average 1.7496478422333206) internal successors, (13663), 7821 states have internal predecessors, (13663), 38 states have call successors, (38), 38 states have call predecessors, (38), 93 states have return successors, (414), 81 states have call predecessors, (414), 37 states have call successors, (414) [2023-03-31 22:32:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 14115 transitions. [2023-03-31 22:32:35,748 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 14115 transitions. Word has length 28 [2023-03-31 22:32:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:35,748 INFO L495 AbstractCegarLoop]: Abstraction has 7941 states and 14115 transitions. [2023-03-31 22:32:35,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22:32:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 14115 transitions. [2023-03-31 22:32:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:32:35,749 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:35,749 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 22:32:35,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:32:35,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:35,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1312813425, now seen corresponding path program 1 times [2023-03-31 22:32:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:35,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546173705] [2023-03-31 22:32:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:35,889 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 22:32:35,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:35,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546173705] [2023-03-31 22:32:35,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546173705] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:35,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448809499] [2023-03-31 22:32:35,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:35,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:35,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:35,892 INFO L87 Difference]: Start difference. First operand 7941 states and 14115 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)