/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:05:07,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:05:07,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:05:07,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:05:07,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:05:07,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:05:07,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:05:07,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:05:07,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:05:07,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:05:07,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:05:07,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:05:07,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:05:07,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:05:07,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:05:07,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:05:07,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:05:07,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:05:07,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:05:07,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:05:07,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:05:07,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:05:07,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:05:07,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:05:07,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:05:07,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:05:07,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:05:07,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:05:07,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:05:07,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:05:07,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:05:07,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:05:07,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:05:07,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:05:07,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:05:07,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:05:07,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:05:07,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:05:07,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:05:07,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:05:07,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:05:07,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:05:07,969 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:05:07,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:05:07,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:05:07,970 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:05:07,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:05:07,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:05:07,971 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:05:07,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:05:07,971 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:05:07,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:05:07,972 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:05:07,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:05:07,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:05:07,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:05:07,972 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:05:07,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:05:07,973 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:05:07,973 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:05:07,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:05:07,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:05:07,975 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:05:07,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:05:07,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:05:07,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:05:07,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:05:07,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:05:07,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:05:07,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:05:08,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:05:08,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:05:08,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:05:08,251 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:05:08,252 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:05:08,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label40.c [2023-04-01 10:05:09,468 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:05:09,911 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:05:09,912 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label40.c [2023-04-01 10:05:09,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f47255a/004ce893f8144f2b93cf112a6412f4ce/FLAG1f6b14849 [2023-04-01 10:05:09,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f47255a/004ce893f8144f2b93cf112a6412f4ce [2023-04-01 10:05:09,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:05:09,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:05:09,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:05:09,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:05:09,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:05:09,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:05:09" (1/1) ... [2023-04-01 10:05:09,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1762bcfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:09, skipping insertion in model container [2023-04-01 10:05:09,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:05:09" (1/1) ... [2023-04-01 10:05:09,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:05:10,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:05:10,292 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/Problem12_label40.c[1561,1574] [2023-04-01 10:05:11,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:05:11,009 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:05:11,027 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/Problem12_label40.c[1561,1574] [2023-04-01 10:05:11,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:05:11,422 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:05:11,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11 WrapperNode [2023-04-01 10:05:11,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:05:11,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:05:11,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:05:11,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:05:11,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,616 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:05:11,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:05:11,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:05:11,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:05:11,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (1/1) ... [2023-04-01 10:05:11,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:05:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:11,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:05:11,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:05:11,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:05:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:05:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:05:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:05:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:05:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:05:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:05:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:05:11,845 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:05:11,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:05:15,370 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:05:16,082 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:05:16,082 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:05:16,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:05:16 BoogieIcfgContainer [2023-04-01 10:05:16,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:05:16,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:05:16,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:05:16,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:05:16,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:05:09" (1/3) ... [2023-04-01 10:05:16,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3b0696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:05:16, skipping insertion in model container [2023-04-01 10:05:16,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:11" (2/3) ... [2023-04-01 10:05:16,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3b0696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:05:16, skipping insertion in model container [2023-04-01 10:05:16,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:05:16" (3/3) ... [2023-04-01 10:05:16,096 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label40.c [2023-04-01 10:05:16,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:05:16,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:05:16,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:05:16,188 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;@35124bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:05:16,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:05:16,197 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 10:05:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:05:16,204 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:16,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:16,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:16,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 636221900, now seen corresponding path program 1 times [2023-04-01 10:05:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779715369] [2023-04-01 10:05:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:16,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:16,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779715369] [2023-04-01 10:05:16,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779715369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:16,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:16,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:05:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196268007] [2023-04-01 10:05:16,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:16,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:05:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:05:16,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:05:16,610 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 10:05:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:19,873 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:05:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:05:19,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:05:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:19,896 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:05:19,896 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:05:19,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:05:19,908 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:19,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 10:05:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:05:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 10:05:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 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 10:05:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-04-01 10:05:20,026 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-04-01 10:05:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:20,027 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-04-01 10:05:20,027 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 10:05:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-04-01 10:05:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:05:20,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:20,029 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, 1, 1] [2023-04-01 10:05:20,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:05:20,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:20,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash -600885078, now seen corresponding path program 1 times [2023-04-01 10:05:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:20,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236014712] [2023-04-01 10:05:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:20,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:20,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:20,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236014712] [2023-04-01 10:05:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236014712] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:20,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:20,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:20,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865334619] [2023-04-01 10:05:20,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:20,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:20,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:20,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:20,213 INFO L87 Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:24,668 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-04-01 10:05:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:05:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-01 10:05:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:24,683 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 10:05:24,684 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 10:05:24,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:05:24,689 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:24,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:05:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 10:05:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 10:05:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 10:05:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-04-01 10:05:24,787 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-04-01 10:05:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:24,788 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-04-01 10:05:24,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-04-01 10:05:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 10:05:24,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:24,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:05:24,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:24,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash 224994384, now seen corresponding path program 1 times [2023-04-01 10:05:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935652729] [2023-04-01 10:05:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:05:25,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:25,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935652729] [2023-04-01 10:05:25,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935652729] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067259564] [2023-04-01 10:05:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:25,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:05:25,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:05:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:25,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:05:25,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:05:25,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:05:25,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067259564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:25,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:05:25,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:05:25,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237794621] [2023-04-01 10:05:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:05:25,274 INFO L87 Difference]: Start difference. First operand 2755 states and 4682 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 10:05:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:29,254 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-04-01 10:05:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:05:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 43 [2023-04-01 10:05:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:29,294 INFO L225 Difference]: With dead ends: 8445 [2023-04-01 10:05:29,294 INFO L226 Difference]: Without dead ends: 5695 [2023-04-01 10:05:29,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:05:29,304 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2315 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4334 mSolverCounterSat, 976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 4334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:29,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 94 Invalid, 5310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 4334 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 10:05:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-04-01 10:05:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-04-01 10:05:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.491941391941392) internal successors, (8146), 5483 states have internal predecessors, (8146), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350) [2023-04-01 10:05:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8523 transitions. [2023-04-01 10:05:29,513 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8523 transitions. Word has length 43 [2023-04-01 10:05:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:29,513 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8523 transitions. [2023-04-01 10:05:29,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 10:05:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8523 transitions. [2023-04-01 10:05:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:05:29,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:29,519 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] [2023-04-01 10:05:29,532 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 10:05:29,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:29,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:29,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2105860955, now seen corresponding path program 1 times [2023-04-01 10:05:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:29,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343852006] [2023-04-01 10:05:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:29,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:29,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343852006] [2023-04-01 10:05:29,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343852006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92202617] [2023-04-01 10:05:29,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:29,917 INFO L87 Difference]: Start difference. First operand 5583 states and 8523 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:34,069 INFO L93 Difference]: Finished difference Result 17084 states and 27298 transitions. [2023-04-01 10:05:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:05:34,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-04-01 10:05:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:34,119 INFO L225 Difference]: With dead ends: 17084 [2023-04-01 10:05:34,120 INFO L226 Difference]: Without dead ends: 11506 [2023-04-01 10:05:34,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:05:34,136 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:34,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 10:05:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-04-01 10:05:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-04-01 10:05:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3301649426894044) internal successors, (14274), 10821 states have internal predecessors, (14274), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406) [2023-04-01 10:05:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15731 transitions. [2023-04-01 10:05:34,450 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15731 transitions. Word has length 42 [2023-04-01 10:05:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:34,450 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15731 transitions. [2023-04-01 10:05:34,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:05:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15731 transitions. [2023-04-01 10:05:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 10:05:34,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:34,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:05:34,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:34,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash 406814811, now seen corresponding path program 1 times [2023-04-01 10:05:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:34,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500941852] [2023-04-01 10:05:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:05:34,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:34,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500941852] [2023-04-01 10:05:34,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500941852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077938168] [2023-04-01 10:05:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:34,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:34,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:34,742 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 10:05:34,747 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 10:05:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:34,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:05:34,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:05:34,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:05:34,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077938168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:34,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:05:34,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:05:34,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610443513] [2023-04-01 10:05:34,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:34,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:34,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:05:34,974 INFO L87 Difference]: Start difference. First operand 11063 states and 15731 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 10:05:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:39,003 INFO L93 Difference]: Finished difference Result 28698 states and 43618 transitions. [2023-04-01 10:05:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:05:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 80 [2023-04-01 10:05:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:39,106 INFO L225 Difference]: With dead ends: 28698 [2023-04-01 10:05:39,107 INFO L226 Difference]: Without dead ends: 17640 [2023-04-01 10:05:39,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 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 10:05:39,143 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:39,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:05:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-04-01 10:05:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-04-01 10:05:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3326930226793903) internal successors, (21507), 16283 states have internal predecessors, (21507), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154) [2023-04-01 10:05:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24737 transitions. [2023-04-01 10:05:39,620 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24737 transitions. Word has length 80 [2023-04-01 10:05:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:39,621 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24737 transitions. [2023-04-01 10:05:39,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 10:05:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24737 transitions. [2023-04-01 10:05:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:05:39,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:39,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:05:39,631 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 10:05:39,830 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 10:05:39,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:39,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash 739055941, now seen corresponding path program 1 times [2023-04-01 10:05:39,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:39,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944770012] [2023-04-01 10:05:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:39,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:05:40,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:40,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944770012] [2023-04-01 10:05:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944770012] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:40,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500025231] [2023-04-01 10:05:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:40,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:40,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:40,032 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 10:05:40,034 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 10:05:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:40,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:05:40,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:05:40,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:05:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:05:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500025231] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:05:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023542609] [2023-04-01 10:05:40,442 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:05:40,442 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:05:40,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:05:40,449 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:05:40,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:05:40,722 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:05:41,933 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58