/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/Problem19_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:33:05,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:33:05,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:33:05,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:33:05,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:33:05,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:33:05,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:33:05,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:33:05,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:33:05,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:33:05,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:33:05,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:33:05,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:33:05,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:33:05,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:33:05,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:33:05,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:33:05,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:33:05,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:33:05,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:33:05,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:33:05,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:33:05,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:33:05,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:33:05,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:33:05,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:33:05,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:33:05,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:33:05,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:33:05,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:33:05,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:33:05,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:33:05,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:33:05,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:33:05,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:33:05,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:33:05,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:33:05,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:33:05,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:33:05,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:33:05,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:33:05,846 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 04:33:05,865 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:33:05,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:33:05,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:33:05,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:33:05,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:33:05,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:33:05,866 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:33:05,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:33:05,866 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:33:05,866 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:33:05,866 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:33:05,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:33:05,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:33:05,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:33:05,867 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:33:05,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:33:05,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:33:05,867 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:33:05,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:33:05,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:33:05,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:33:05,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:33:05,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:33:05,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:33:06,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:33:06,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:33:06,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:33:06,032 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:33:06,033 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:33:06,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label49.c [2023-04-01 04:33:06,945 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:33:07,410 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:33:07,411 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label49.c [2023-04-01 04:33:07,447 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58634c86d/712dc486689447508b5df8131d271ba6/FLAG0ebe494f3 [2023-04-01 04:33:07,462 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58634c86d/712dc486689447508b5df8131d271ba6 [2023-04-01 04:33:07,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:33:07,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:33:07,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:33:07,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:33:07,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:33:07,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:33:07" (1/1) ... [2023-04-01 04:33:07,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f726789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:07, skipping insertion in model container [2023-04-01 04:33:07,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:33:07" (1/1) ... [2023-04-01 04:33:07,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:33:07,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:33:07,963 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label49.c[5659,5672] [2023-04-01 04:33:08,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:33:08,868 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:33:08,885 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label49.c[5659,5672] [2023-04-01 04:33:09,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:33:09,394 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:33:09,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09 WrapperNode [2023-04-01 04:33:09,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:33:09,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:33:09,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:33:09,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:33:09,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:33:09,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:33:09,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:33:09,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:33:09,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (1/1) ... [2023-04-01 04:33:09,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:33:09,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:33:09,787 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 04:33:09,794 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 04:33:09,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:33:09,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:33:09,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:33:09,824 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:33:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:33:10,006 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:33:10,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:33:15,571 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:33:28,819 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:33:28,819 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:33:28,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:33:28 BoogieIcfgContainer [2023-04-01 04:33:28,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:33:28,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:33:28,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:33:28,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:33:28,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:33:07" (1/3) ... [2023-04-01 04:33:28,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2c6cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:33:28, skipping insertion in model container [2023-04-01 04:33:28,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:09" (2/3) ... [2023-04-01 04:33:28,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2c6cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:33:28, skipping insertion in model container [2023-04-01 04:33:28,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:33:28" (3/3) ... [2023-04-01 04:33:28,828 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label49.c [2023-04-01 04:33:28,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:33:28,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:33:28,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:33:28,907 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;@151dbb08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:33:28,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:33:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:33:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:33:28,922 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:28,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:28,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:28,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1235901155, now seen corresponding path program 1 times [2023-04-01 04:33:28,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:28,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429576851] [2023-04-01 04:33:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:29,229 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 04:33:29,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429576851] [2023-04-01 04:33:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429576851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:29,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:33:29,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:33:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028285432] [2023-04-01 04:33:29,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:29,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:33:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:33:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:33:29,259 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:33:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:34,487 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:33:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:33:34,489 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 04:33:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:34,513 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:33:34,513 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:33:34,522 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 04:33:34,526 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:34,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 04:33:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:33:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:33:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:33:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-04-01 04:33:34,638 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-04-01 04:33:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:34,638 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-04-01 04:33:34,638 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 04:33:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-04-01 04:33:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:33:34,639 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:34,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:33:34,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:34,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash 947755893, now seen corresponding path program 1 times [2023-04-01 04:33:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090181736] [2023-04-01 04:33:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:34,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:34,816 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 04:33:34,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:34,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090181736] [2023-04-01 04:33:34,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090181736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:34,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:33:34,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:33:34,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633973139] [2023-04-01 04:33:34,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:33:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:33:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:33:34,819 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:33:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:42,303 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-04-01 04:33:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:33:42,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:33:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:42,320 INFO L225 Difference]: With dead ends: 6943 [2023-04-01 04:33:42,320 INFO L226 Difference]: Without dead ends: 4679 [2023-04-01 04:33:42,325 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 04:33:42,326 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:42,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-01 04:33:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-04-01 04:33:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-04-01 04:33:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-04-01 04:33:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-04-01 04:33:42,424 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-04-01 04:33:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:42,425 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-04-01 04:33:42,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:33:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-04-01 04:33:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:33:42,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:42,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:42,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:33:42,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:42,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1398150624, now seen corresponding path program 1 times [2023-04-01 04:33:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:42,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355688852] [2023-04-01 04:33:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:42,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:42,530 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 04:33:42,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355688852] [2023-04-01 04:33:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355688852] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:42,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:33:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:33:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750459060] [2023-04-01 04:33:42,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:33:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:33:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:33:42,533 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:33:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:48,511 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-04-01 04:33:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:33:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:33:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:48,553 INFO L225 Difference]: With dead ends: 14148 [2023-04-01 04:33:48,554 INFO L226 Difference]: Without dead ends: 9546 [2023-04-01 04:33:48,566 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 04:33:48,568 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3493 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3493 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1102 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:48,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3493 Valid, 175 Invalid, 8266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1102 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 04:33:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-04-01 04:33:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-04-01 04:33:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.422506577373834) internal successors, (11895), 8395 states have internal predecessors, (11895), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-04-01 04:33:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12537 transitions. [2023-04-01 04:33:48,745 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12537 transitions. Word has length 23 [2023-04-01 04:33:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:48,745 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12537 transitions. [2023-04-01 04:33:48,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:33:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12537 transitions. [2023-04-01 04:33:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:33:48,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:48,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:48,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:33:48,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:48,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash 126447627, now seen corresponding path program 1 times [2023-04-01 04:33:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30784143] [2023-04-01 04:33:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:33:48,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30784143] [2023-04-01 04:33:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30784143] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:33:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94846233] [2023-04-01 04:33:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:48,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:33:48,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:33:48,894 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 04:33:48,897 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 04:33:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:48,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:33:48,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:33:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:33:49,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:33:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94846233] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:49,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:33:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:33:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917223060] [2023-04-01 04:33:49,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:33:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:33:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:33:49,048 INFO L87 Difference]: Start difference. First operand 8592 states and 12537 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:33:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:56,619 INFO L93 Difference]: Finished difference Result 23488 states and 35886 transitions. [2023-04-01 04:33:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:33:56,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-04-01 04:33:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:56,673 INFO L225 Difference]: With dead ends: 23488 [2023-04-01 04:33:56,673 INFO L226 Difference]: Without dead ends: 14901 [2023-04-01 04:33:56,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:33:56,695 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3533 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7306 mSolverCounterSat, 2403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 9709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2403 IncrementalHoareTripleChecker+Valid, 7306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:56,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 139 Invalid, 9709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2403 Valid, 7306 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 04:33:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14901 states. [2023-04-01 04:33:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14901 to 14680. [2023-04-01 04:33:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14680 states, 14230 states have (on average 1.354181307097681) internal successors, (19270), 14307 states have internal predecessors, (19270), 65 states have call successors, (65), 65 states have call predecessors, (65), 384 states have return successors, (1656), 307 states have call predecessors, (1656), 64 states have call successors, (1656) [2023-04-01 04:33:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14680 states to 14680 states and 20991 transitions. [2023-04-01 04:33:56,967 INFO L78 Accepts]: Start accepts. Automaton has 14680 states and 20991 transitions. Word has length 42 [2023-04-01 04:33:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:56,968 INFO L495 AbstractCegarLoop]: Abstraction has 14680 states and 20991 transitions. [2023-04-01 04:33:56,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:33:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14680 states and 20991 transitions. [2023-04-01 04:33:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 04:33:56,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:56,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:33:56,983 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 04:33:57,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:33:57,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:57,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 201674619, now seen corresponding path program 1 times [2023-04-01 04:33:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:57,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910874582] [2023-04-01 04:33:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:33:57,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910874582] [2023-04-01 04:33:57,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910874582] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:33:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319745479] [2023-04-01 04:33:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:33:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:33:57,325 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 04:33:57,328 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 04:33:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:57,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:33:57,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:33:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:33:57,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:33:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319745479] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:57,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:33:57,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 04:33:57,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390044488] [2023-04-01 04:33:57,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:57,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:33:57,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:57,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:33:57,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:33:57,467 INFO L87 Difference]: Start difference. First operand 14680 states and 20991 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 04:34:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:04,489 INFO L93 Difference]: Finished difference Result 44613 states and 65676 transitions. [2023-04-01 04:34:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:34:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 52 [2023-04-01 04:34:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:04,578 INFO L225 Difference]: With dead ends: 44613 [2023-04-01 04:34:04,578 INFO L226 Difference]: Without dead ends: 29938 [2023-04-01 04:34:04,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:34:04,612 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5991 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 6258 mSolverCounterSat, 906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5991 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 6258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:04,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5991 Valid, 123 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 6258 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 04:34:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29938 states. [2023-04-01 04:34:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29938 to 29340. [2023-04-01 04:34:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29340 states, 28322 states have (on average 1.3070404632441213) internal successors, (37018), 28517 states have internal predecessors, (37018), 126 states have call successors, (126), 126 states have call predecessors, (126), 891 states have return successors, (3756), 696 states have call predecessors, (3756), 125 states have call successors, (3756) [2023-04-01 04:34:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29340 states to 29340 states and 40900 transitions. [2023-04-01 04:34:05,226 INFO L78 Accepts]: Start accepts. Automaton has 29340 states and 40900 transitions. Word has length 52 [2023-04-01 04:34:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:05,226 INFO L495 AbstractCegarLoop]: Abstraction has 29340 states and 40900 transitions. [2023-04-01 04:34:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 04:34:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 29340 states and 40900 transitions. [2023-04-01 04:34:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-04-01 04:34:05,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:05,233 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:34:05,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 04:34:05,437 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 04:34:05,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:05,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:05,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1187605846, now seen corresponding path program 1 times [2023-04-01 04:34:05,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:05,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907322414] [2023-04-01 04:34:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:05,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 65 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 04:34:05,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907322414] [2023-04-01 04:34:05,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907322414] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:34:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124470305] [2023-04-01 04:34:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:05,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:34:05,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:34:05,708 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 04:34:05,710 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 04:34:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:05,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:34:05,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:34:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 04:34:05,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:34:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 65 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 04:34:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124470305] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:34:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760979291] [2023-04-01 04:34:06,119 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-04-01 04:34:06,119 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:34:06,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:34:06,125 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:34:06,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:34:06,233 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 04:34:06,536 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36