/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:06:43,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:06:43,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:06:43,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:06:43,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:06:43,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:06:43,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:06:43,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:06:43,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:06:43,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:06:43,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:06:43,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:06:43,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:06:43,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:06:43,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:06:43,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:06:43,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:06:43,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:06:43,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:06:43,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:06:43,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:06:43,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:06:43,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:06:43,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:06:43,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:06:43,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:06:43,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:06:43,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:06:43,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:06:43,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:06:43,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:06:43,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:06:43,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:06:43,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:06:43,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:06:43,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:06:43,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:06:43,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:06:43,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:06:43,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:06:43,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:06:43,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:06:43,943 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:06:43,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:06:43,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:06:43,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:06:43,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:06:43,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:06:43,944 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:06:43,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:06:43,945 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:06:43,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:06:43,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:06:43,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:06:43,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:06:43,947 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:06:43,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:06:43,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:06:43,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:06:43,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:06:43,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:06:43,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:06:43,948 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:06:43,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:06:43,948 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:06:43,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:06:43,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:06:43,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:06:43,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:06:43,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:06:43,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:06:43,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:06:44,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:06:44,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:06:44,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:06:44,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:06:44,200 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:06:44,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2023-04-01 04:06:45,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:06:45,857 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:06:45,858 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2023-04-01 04:06:45,895 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6a778b0/0789a7caaab24e148ded4efe6ca56522/FLAGa8b13b9a5 [2023-04-01 04:06:45,911 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6a778b0/0789a7caaab24e148ded4efe6ca56522 [2023-04-01 04:06:45,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:06:45,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:06:45,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:06:45,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:06:45,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:06:45,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:06:45" (1/1) ... [2023-04-01 04:06:45,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4594f1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:45, skipping insertion in model container [2023-04-01 04:06:45,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:06:45" (1/1) ... [2023-04-01 04:06:45,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:06:46,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:06:46,302 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/Problem13_label40.c[4201,4214] [2023-04-01 04:06:47,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:06:47,151 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:06:47,179 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/Problem13_label40.c[4201,4214] [2023-04-01 04:06:47,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:06:47,683 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:06:47,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47 WrapperNode [2023-04-01 04:06:47,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:06:47,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:06:47,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:06:47,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:06:47,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,964 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:47,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:48,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:06:48,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:06:48,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:06:48,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:06:48,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (1/1) ... [2023-04-01 04:06:48,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:06:48,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:48,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:06:48,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:06:48,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:06:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:06:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:06:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:06:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:06:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:06:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:06:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:06:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:06:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:06:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:06:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:06:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:06:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:06:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:06:48,153 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:06:48,155 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:06:53,007 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:06:55,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:06:55,972 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:06:55,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:06:55 BoogieIcfgContainer [2023-04-01 04:06:55,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:06:55,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:06:55,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:06:55,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:06:55,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:06:45" (1/3) ... [2023-04-01 04:06:55,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730c4aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:06:55, skipping insertion in model container [2023-04-01 04:06:55,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:47" (2/3) ... [2023-04-01 04:06:55,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730c4aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:06:55, skipping insertion in model container [2023-04-01 04:06:55,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:06:55" (3/3) ... [2023-04-01 04:06:55,983 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2023-04-01 04:06:55,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:06:55,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:06:56,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:06:56,071 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;@67e45745, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:06:56,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:06:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:06:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:06:56,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:56,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:56,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:56,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash -330934476, now seen corresponding path program 1 times [2023-04-01 04:06:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:56,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095784189] [2023-04-01 04:06:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:56,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:56,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095784189] [2023-04-01 04:06:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095784189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:56,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:56,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:06:56,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204609883] [2023-04-01 04:06:56,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:56,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:06:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:06:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:56,475 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:06:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:59,899 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:06:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:06:59,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:06:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:59,921 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:06:59,921 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:06:59,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:59,932 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:59,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:06:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:07:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-01 04:07:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:07:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-01 04:07:00,027 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-01 04:07:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:07:00,027 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-01 04:07:00,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:07:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-01 04:07:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:07:00,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:07:00,029 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] [2023-04-01 04:07:00,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:07:00,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:07:00,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:07:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash 524687753, now seen corresponding path program 1 times [2023-04-01 04:07:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:07:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964570058] [2023-04-01 04:07:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:00,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:07:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:07:00,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:07:00,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964570058] [2023-04-01 04:07:00,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964570058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:07:00,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:07:00,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:07:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264428574] [2023-04-01 04:07:00,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:07:00,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:07:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:07:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:07:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:07:00,258 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:07:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:07:05,783 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-01 04:07:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:07:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-04-01 04:07:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:07:05,800 INFO L225 Difference]: With dead ends: 4183 [2023-04-01 04:07:05,801 INFO L226 Difference]: Without dead ends: 2819 [2023-04-01 04:07:05,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:07:05,806 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:07:05,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 04:07:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-01 04:07:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-01 04:07:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-01 04:07:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-01 04:07:06,023 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-01 04:07:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:07:06,023 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-01 04:07:06,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:07:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-01 04:07:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:07:06,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:07:06,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:07:06,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:07:06,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:07:06,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:07:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1151540243, now seen corresponding path program 1 times [2023-04-01 04:07:06,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:07:06,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651516040] [2023-04-01 04:07:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:07:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:07:06,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:07:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651516040] [2023-04-01 04:07:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651516040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:07:06,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:07:06,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:07:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538319880] [2023-04-01 04:07:06,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:07:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:07:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:07:06,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:07:06,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:07:06,259 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:07:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:07:12,437 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-01 04:07:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:07:12,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-04-01 04:07:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:07:12,477 INFO L225 Difference]: With dead ends: 8433 [2023-04-01 04:07:12,477 INFO L226 Difference]: Without dead ends: 5687 [2023-04-01 04:07:12,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:07:12,489 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:07:12,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 04:07:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-01 04:07:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-01 04:07:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.5074380165289256) internal successors, (8208), 5471 states have internal predecessors, (8208), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-01 04:07:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-04-01 04:07:12,651 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-04-01 04:07:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:07:12,652 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-04-01 04:07:12,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:07:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-04-01 04:07:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:07:12,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:07:12,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:07:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:07:12,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:07:12,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:07:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2121447219, now seen corresponding path program 1 times [2023-04-01 04:07:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:07:12,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969801296] [2023-04-01 04:07:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:07:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:07:12,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:07:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969801296] [2023-04-01 04:07:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969801296] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:07:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908897583] [2023-04-01 04:07:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:07:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:07:12,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:07:12,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:07:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:13,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:07:13,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:07:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:07:13,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:07:13,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908897583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:07:13,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:07:13,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:07:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846129347] [2023-04-01 04:07:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:07:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:07:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:07:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:07:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:07:13,149 INFO L87 Difference]: Start difference. First operand 5570 states and 8648 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:07:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:07:17,282 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-04-01 04:07:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:07:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-04-01 04:07:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:07:17,344 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 04:07:17,344 INFO L226 Difference]: Without dead ends: 11203 [2023-04-01 04:07:17,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:07:17,370 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:07:17,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 04:07:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-01 04:07:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-04-01 04:07:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9575 states have (on average 1.370130548302872) internal successors, (13119), 9640 states have internal predecessors, (13119), 47 states have call successors, (47), 47 states have call predecessors, (47), 211 states have return successors, (1286), 146 states have call predecessors, (1286), 46 states have call successors, (1286) [2023-04-01 04:07:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-04-01 04:07:17,683 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-04-01 04:07:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:07:17,683 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-04-01 04:07:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:07:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-04-01 04:07:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 04:07:17,685 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:07:17,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:07:17,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:07:17,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:07:17,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:07:17,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:07:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2034971674, now seen corresponding path program 1 times [2023-04-01 04:07:17,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:07:17,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385688055] [2023-04-01 04:07:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:07:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:07:18,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:07:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385688055] [2023-04-01 04:07:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385688055] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:07:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266698988] [2023-04-01 04:07:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:18,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:07:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:07:18,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:07:18,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:07:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:18,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:07:18,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:07:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:07:18,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:07:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266698988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:07:18,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:07:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:07:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951022009] [2023-04-01 04:07:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:07:18,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:07:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:07:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:07:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:07:18,306 INFO L87 Difference]: Start difference. First operand 9834 states and 14452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:07:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:07:22,836 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-04-01 04:07:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:07:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-01 04:07:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:07:22,902 INFO L225 Difference]: With dead ends: 24791 [2023-04-01 04:07:22,902 INFO L226 Difference]: Without dead ends: 14962 [2023-04-01 04:07:22,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:07:22,934 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2042 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:07:22,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 103 Invalid, 5446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 04:07:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-04-01 04:07:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14613. [2023-04-01 04:07:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14613 states, 14164 states have (on average 1.2820530923467948) internal successors, (18159), 14289 states have internal predecessors, (18159), 69 states have call successors, (69), 69 states have call predecessors, (69), 379 states have return successors, (2717), 254 states have call predecessors, (2717), 68 states have call successors, (2717) [2023-04-01 04:07:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14613 states to 14613 states and 20945 transitions. [2023-04-01 04:07:23,321 INFO L78 Accepts]: Start accepts. Automaton has 14613 states and 20945 transitions. Word has length 45 [2023-04-01 04:07:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:07:23,322 INFO L495 AbstractCegarLoop]: Abstraction has 14613 states and 20945 transitions. [2023-04-01 04:07:23,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:07:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 14613 states and 20945 transitions. [2023-04-01 04:07:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:07:23,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:07:23,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:07:23,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:07:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:07:23,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:07:23,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:07:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1103051381, now seen corresponding path program 1 times [2023-04-01 04:07:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:07:23,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689859202] [2023-04-01 04:07:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:07:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:07:23,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:07:23,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689859202] [2023-04-01 04:07:23,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689859202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:07:23,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:07:23,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:07:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131775031] [2023-04-01 04:07:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:07:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:07:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:07:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:07:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:07:23,706 INFO L87 Difference]: Start difference. First operand 14613 states and 20945 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:07:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:07:27,003 INFO L93 Difference]: Finished difference Result 30633 states and 45247 transitions. [2023-04-01 04:07:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:07:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 04:07:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:07:27,053 INFO L225 Difference]: With dead ends: 30633 [2023-04-01 04:07:27,053 INFO L226 Difference]: Without dead ends: 16025 [2023-04-01 04:07:27,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:07:27,085 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:07:27,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:07:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16025 states. [2023-04-01 04:07:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16025 to 15824. [2023-04-01 04:07:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15824 states, 15366 states have (on average 1.2359104516464923) internal successors, (18991), 15492 states have internal predecessors, (18991), 74 states have call successors, (74), 74 states have call predecessors, (74), 383 states have return successors, (2733), 257 states have call predecessors, (2733), 73 states have call successors, (2733) [2023-04-01 04:07:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15824 states to 15824 states and 21798 transitions. [2023-04-01 04:07:27,414 INFO L78 Accepts]: Start accepts. Automaton has 15824 states and 21798 transitions. Word has length 79 [2023-04-01 04:07:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:07:27,415 INFO L495 AbstractCegarLoop]: Abstraction has 15824 states and 21798 transitions. [2023-04-01 04:07:27,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:07:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 15824 states and 21798 transitions. [2023-04-01 04:07:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 04:07:27,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:07:27,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:07:27,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:07:27,418 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:07:27,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:07:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash -971094602, now seen corresponding path program 1 times [2023-04-01 04:07:27,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:07:27,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215048317] [2023-04-01 04:07:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:07:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:07:27,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:07:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215048317] [2023-04-01 04:07:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215048317] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:07:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025931892] [2023-04-01 04:07:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:07:27,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:07:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:07:27,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:07:27,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:07:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:07:28,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 04:07:28,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:07:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:07:28,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:07:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:07:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025931892] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:07:28,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:07:28,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-04-01 04:07:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124526873] [2023-04-01 04:07:28,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:07:28,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:07:28,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:07:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:07:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-04-01 04:07:28,530 INFO L87 Difference]: Start difference. First operand 15824 states and 21798 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:07:37,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:07:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:07:37,889 INFO L93 Difference]: Finished difference Result 59460 states and 84274 transitions. [2023-04-01 04:07:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:07:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 81 [2023-04-01 04:07:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:07:38,060 INFO L225 Difference]: With dead ends: 59460 [2023-04-01 04:07:38,060 INFO L226 Difference]: Without dead ends: 43641 [2023-04-01 04:07:38,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-04-01 04:07:38,111 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2016 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 5933 mSolverCounterSat, 1573 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 7507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1573 IncrementalHoareTripleChecker+Valid, 5933 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:07:38,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 124 Invalid, 7507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1573 Valid, 5933 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2023-04-01 04:07:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43641 states.