/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/Problem12_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:01:42,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:01:42,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:01:42,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:01:42,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:01:42,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:01:42,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:01:42,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:01:42,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:01:42,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:01:42,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:01:42,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:01:42,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:01:42,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:01:42,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:01:42,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:01:42,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:01:42,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:01:42,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:01:42,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:01:42,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:01:42,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:01:42,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:01:42,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:01:42,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:01:42,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:01:42,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:01:42,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:01:42,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:01:42,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:01:42,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:01:42,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:01:42,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:01:42,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:01:42,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:01:42,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:01:42,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:01:42,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:01:42,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:01:42,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:01:42,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:01:42,873 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 04:01:42,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:01:42,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:01:42,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:01:42,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:01:42,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:01:42,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:01:42,897 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:01:42,897 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:01:42,897 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:01:42,897 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:01:42,897 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:01:42,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:01:42,898 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:01:42,898 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:01:42,898 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:01:42,898 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:01:42,898 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:01:42,898 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:01:42,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:01:42,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:01:42,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:01:42,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:01:42,900 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:01:42,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:01:42,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:01:42,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:01:42,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:01:42,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:01:42,901 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:01:42,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:01:42,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:01:42,902 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:01:42,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:01:42,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:01:42,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:01:42,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:01:43,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:01:43,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:01:43,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:01:43,196 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:01:43,197 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:01:43,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label31.c [2023-04-01 04:01:44,370 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:01:44,776 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:01:44,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label31.c [2023-04-01 04:01:44,805 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44d9fe4f/abe97c780d584a839bece5bafa49862e/FLAGc025d07ae [2023-04-01 04:01:44,824 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44d9fe4f/abe97c780d584a839bece5bafa49862e [2023-04-01 04:01:44,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:01:44,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:01:44,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:01:44,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:01:44,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:01:44,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:01:44" (1/1) ... [2023-04-01 04:01:44,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b44e3da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:44, skipping insertion in model container [2023-04-01 04:01:44,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:01:44" (1/1) ... [2023-04-01 04:01:44,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:01:44,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:01:45,155 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_label31.c[7776,7789] [2023-04-01 04:01:45,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:01:45,838 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:01:45,867 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_label31.c[7776,7789] [2023-04-01 04:01:46,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:01:46,267 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:01:46,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46 WrapperNode [2023-04-01 04:01:46,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:01:46,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:01:46,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:01:46,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:01:46,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:01:46,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:01:46,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:01:46,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:01:46,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (1/1) ... [2023-04-01 04:01:46,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:01:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:01:46,574 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 04:01:46,589 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 04:01:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:01:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:01:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:01:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:01:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:01:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:01:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:01:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:01:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:01:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:01:46,729 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:01:46,731 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:01:50,428 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:01:51,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:01:51,003 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:01:51,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:01:51 BoogieIcfgContainer [2023-04-01 04:01:51,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:01:51,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:01:51,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:01:51,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:01:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:01:44" (1/3) ... [2023-04-01 04:01:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772a454f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:01:51, skipping insertion in model container [2023-04-01 04:01:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:46" (2/3) ... [2023-04-01 04:01:51,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772a454f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:01:51, skipping insertion in model container [2023-04-01 04:01:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:01:51" (3/3) ... [2023-04-01 04:01:51,014 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label31.c [2023-04-01 04:01:51,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:01:51,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:01:51,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:01:51,113 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;@7c0dd2a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:01:51,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:01:51,122 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 04:01:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:01:51,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:51,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:51,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:51,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash 636351044, now seen corresponding path program 1 times [2023-04-01 04:01:51,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:51,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142861772] [2023-04-01 04:01:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:51,508 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 04:01:51,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142861772] [2023-04-01 04:01:51,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142861772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:51,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:51,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:01:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949312731] [2023-04-01 04:01:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:51,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:01:51,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:01:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:01:51,544 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 04:01:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:55,004 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:01:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:01:55,007 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 04:01:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:55,029 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:01:55,029 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:01:55,038 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 04:01:55,041 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:55,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:01:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:01:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:01:55,142 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 04:01:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-04-01 04:01:55,152 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-04-01 04:01:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:55,153 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-04-01 04:01:55,153 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 04:01:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-04-01 04:01:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:01:55,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:55,155 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 04:01:55,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:01:55,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:55,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1824207849, now seen corresponding path program 1 times [2023-04-01 04:01:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:55,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925191225] [2023-04-01 04:01:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:55,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:55,418 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 04:01:55,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:55,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925191225] [2023-04-01 04:01:55,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925191225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:55,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:55,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:01:55,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616804134] [2023-04-01 04:01:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:01:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:01:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:01:55,425 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 04:01:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:59,771 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-04-01 04:01:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:01:59,772 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 04:01:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:59,786 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 04:01:59,786 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 04:01:59,790 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 04:01:59,791 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:59,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 04:01:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 04:01:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 04:01:59,897 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 04:01:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-04-01 04:01:59,908 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-04-01 04:01:59,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:59,909 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-04-01 04:01:59,909 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 04:01:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-04-01 04:01:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 04:01:59,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:59,912 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 04:01:59,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:01:59,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:59,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash 90389014, now seen corresponding path program 1 times [2023-04-01 04:01:59,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:59,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058239322] [2023-04-01 04:01:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:59,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:00,303 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 04:02:00,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058239322] [2023-04-01 04:02:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058239322] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:00,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533252180] [2023-04-01 04:02:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:00,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:00,315 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 04:02:00,316 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 04:02:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:00,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:02:00,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:00,559 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 04:02:00,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:02:00,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533252180] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:00,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:02:00,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:02:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945844216] [2023-04-01 04:02:00,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:00,562 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 04:02:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:04,656 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-04-01 04:02:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:02:04,661 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 04:02:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:04,696 INFO L225 Difference]: With dead ends: 8445 [2023-04-01 04:02:04,696 INFO L226 Difference]: Without dead ends: 5695 [2023-04-01 04:02:04,703 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 04:02:04,706 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2315 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4336 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:04,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 94 Invalid, 5311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4336 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 04:02:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-04-01 04:02:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-04-01 04:02:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.4923076923076923) internal successors, (8148), 5483 states have internal predecessors, (8148), 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 04:02:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8525 transitions. [2023-04-01 04:02:04,895 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8525 transitions. Word has length 43 [2023-04-01 04:02:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:04,896 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8525 transitions. [2023-04-01 04:02:04,896 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 04:02:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8525 transitions. [2023-04-01 04:02:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:02:04,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:04,901 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 04:02:04,916 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 04:02:05,109 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 04:02:05,110 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:05,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:05,111 INFO L85 PathProgramCache]: Analyzing trace with hash -248640074, now seen corresponding path program 1 times [2023-04-01 04:02:05,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:05,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636214110] [2023-04-01 04:02:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:05,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:05,292 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 04:02:05,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:05,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636214110] [2023-04-01 04:02:05,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636214110] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:05,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:02:05,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:02:05,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680214989] [2023-04-01 04:02:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:02:05,299 INFO L87 Difference]: Start difference. First operand 5583 states and 8525 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 04:02:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:09,727 INFO L93 Difference]: Finished difference Result 17084 states and 27304 transitions. [2023-04-01 04:02:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:02:09,730 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 04:02:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:09,785 INFO L225 Difference]: With dead ends: 17084 [2023-04-01 04:02:09,786 INFO L226 Difference]: Without dead ends: 11506 [2023-04-01 04:02:09,800 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 04:02:09,805 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:09,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 04:02:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-04-01 04:02:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-04-01 04:02:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3303513186096356) internal successors, (14276), 10821 states have internal predecessors, (14276), 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 04:02:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15733 transitions. [2023-04-01 04:02:10,113 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15733 transitions. Word has length 42 [2023-04-01 04:02:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:10,113 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15733 transitions. [2023-04-01 04:02:10,113 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 04:02:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15733 transitions. [2023-04-01 04:02:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 04:02:10,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:10,119 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 04:02:10,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:02:10,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:10,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1440701517, now seen corresponding path program 1 times [2023-04-01 04:02:10,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:10,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750032334] [2023-04-01 04:02:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:10,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:10,425 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 04:02:10,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:10,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750032334] [2023-04-01 04:02:10,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750032334] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:10,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886085448] [2023-04-01 04:02:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:10,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:10,435 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 04:02:10,465 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 04:02:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:10,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:02:10,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:10,764 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 04:02:10,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:02:10,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886085448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:10,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:02:10,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:02:10,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404485212] [2023-04-01 04:02:10,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:10,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:10,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:10,770 INFO L87 Difference]: Start difference. First operand 11063 states and 15733 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 04:02:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:14,541 INFO L93 Difference]: Finished difference Result 28698 states and 43622 transitions. [2023-04-01 04:02:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:02:14,541 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 04:02:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:14,624 INFO L225 Difference]: With dead ends: 28698 [2023-04-01 04:02:14,625 INFO L226 Difference]: Without dead ends: 17640 [2023-04-01 04:02:14,658 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 04:02:14,659 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:14,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:02:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-04-01 04:02:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-04-01 04:02:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3328169537737018) internal successors, (21509), 16283 states have internal predecessors, (21509), 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 04:02:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24739 transitions. [2023-04-01 04:02:15,151 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24739 transitions. Word has length 80 [2023-04-01 04:02:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:15,153 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24739 transitions. [2023-04-01 04:02:15,154 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 04:02:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24739 transitions. [2023-04-01 04:02:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 04:02:15,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:15,156 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 04:02:15,167 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 04:02:15,363 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 04:02:15,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:15,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash -100542986, now seen corresponding path program 1 times [2023-04-01 04:02:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:15,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229455554] [2023-04-01 04:02:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:15,619 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 04:02:15,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229455554] [2023-04-01 04:02:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229455554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842512676] [2023-04-01 04:02:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:15,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:15,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:15,621 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 04:02:15,624 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 04:02:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:15,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:02:15,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:15,837 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 04:02:15,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:02:16,050 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 04:02:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842512676] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:02:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288048031] [2023-04-01 04:02:16,070 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 04:02:16,071 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:02:16,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:02:16,078 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:02:16,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:02:16,307 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:02:16,582 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2023-04-01 04:02:25,584 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 95672 conjuctions. This might take some time... [2023-04-01 04:02:31,752 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 273 conjuctions.