/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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:29:25,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:29:25,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:29:25,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:29:25,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:29:25,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:29:25,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:29:25,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:29:25,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:29:25,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:29:25,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:29:25,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:29:25,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:29:25,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:29:25,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:29:25,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:29:25,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:29:25,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:29:25,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:29:25,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:29:25,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:29:25,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:29:25,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:29:25,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:29:25,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:29:25,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:29:25,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:29:25,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:29:25,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:29:25,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:29:25,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:29:25,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:29:25,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:29:25,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:29:25,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:29:25,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:29:25,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:29:25,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:29:25,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:29:25,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:29:25,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:29:25,843 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 04:29:25,862 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:29:25,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:29:25,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:29:25,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:29:25,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:29:25,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:29:25,864 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:29:25,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:29:25,865 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:29:25,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:29:25,865 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:29:25,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:29:25,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:29:25,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:29:25,866 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:29:25,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:29:25,866 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:29:25,866 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:29:25,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:29:25,867 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:29:25,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:29:25,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:29:25,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:29:25,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:25,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:29:25,868 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:29:25,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:29:25,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:29:25,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:29:25,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:29:25,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:29:25,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:29:25,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:29:26,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:29:26,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:29:26,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:29:26,070 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:29:26,070 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:29:26,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label01.c [2023-04-01 04:29:27,123 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:29:27,527 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:29:27,528 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label01.c [2023-04-01 04:29:27,567 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9087d422b/8728c64feec74c9291e4d6a87a97edc3/FLAG218dd00dd [2023-04-01 04:29:27,580 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9087d422b/8728c64feec74c9291e4d6a87a97edc3 [2023-04-01 04:29:27,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:29:27,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:29:27,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:27,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:29:27,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:29:27,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:27" (1/1) ... [2023-04-01 04:29:27,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b07995a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:27, skipping insertion in model container [2023-04-01 04:29:27,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:27" (1/1) ... [2023-04-01 04:29:27,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:29:27,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:29:28,050 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_label01.c[8162,8175] [2023-04-01 04:29:28,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:28,978 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:29:29,014 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_label01.c[8162,8175] [2023-04-01 04:29:29,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:29,586 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:29:29,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29 WrapperNode [2023-04-01 04:29:29,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:29,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:29:29,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:29:29,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:29:29,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,903 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:29:29,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:29:29,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:29:29,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:29:29,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (1/1) ... [2023-04-01 04:29:29,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:30,010 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 04:29:30,012 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 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:29:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:29:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:29:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:29:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:29:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:29:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:29:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:29:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:29:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:29:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:29:30,139 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:29:30,141 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:29:36,389 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:29:50,373 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:29:50,373 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:29:50,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:29:50 BoogieIcfgContainer [2023-04-01 04:29:50,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:29:50,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:29:50,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:29:50,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:29:50,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:29:27" (1/3) ... [2023-04-01 04:29:50,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d113a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:29:50, skipping insertion in model container [2023-04-01 04:29:50,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:29" (2/3) ... [2023-04-01 04:29:50,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d113a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:29:50, skipping insertion in model container [2023-04-01 04:29:50,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:29:50" (3/3) ... [2023-04-01 04:29:50,386 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label01.c [2023-04-01 04:29:50,399 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:29:50,399 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:29:50,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:29:50,461 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;@4cc27b5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:29:50,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:29:50,469 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 04:29:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:29:50,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:50,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:50,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:50,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1235906531, now seen corresponding path program 1 times [2023-04-01 04:29:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975089736] [2023-04-01 04:29:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:50,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:50,787 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 04:29:50,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975089736] [2023-04-01 04:29:50,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975089736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:50,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:50,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:29:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38776843] [2023-04-01 04:29:50,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:29:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:29:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:29:50,828 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 04:29:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:56,159 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:29:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:29:56,162 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 04:29:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:56,179 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:29:56,179 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:29:56,187 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 04:29:56,191 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:56,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 04:29:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:29:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:29:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 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 04:29:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 04:29:56,310 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 04:29:56,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:56,310 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 04:29:56,311 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 04:29:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 04:29:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:29:56,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:56,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:29:56,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:56,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash -163985333, now seen corresponding path program 1 times [2023-04-01 04:29:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:56,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048961545] [2023-04-01 04:29:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:56,508 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 04:29:56,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:56,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048961545] [2023-04-01 04:29:56,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048961545] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:56,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:56,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:29:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331608087] [2023-04-01 04:29:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:56,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:56,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:29:56,511 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:30:05,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:30:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:05,346 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 04:30:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 04:30:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:05,372 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 04:30:05,372 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 04:30:05,376 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 04:30:05,378 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 2061 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:05,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6431 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2023-04-01 04:30:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 04:30:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 04:30:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 04:30:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 04:30:05,488 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 04:30:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:05,488 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 04:30:05,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:30:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 04:30:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:30:05,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:05,489 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 04:30:05,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:30:05,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:05,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1961951939, now seen corresponding path program 1 times [2023-04-01 04:30:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:05,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003565583] [2023-04-01 04:30:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:05,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:05,633 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 04:30:05,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003565583] [2023-04-01 04:30:05,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003565583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:05,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:05,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:05,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523681028] [2023-04-01 04:30:05,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:05,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:05,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:05,635 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 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 04:30:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:13,553 INFO L93 Difference]: Finished difference Result 13015 states and 23487 transitions. [2023-04-01 04:30:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:13,554 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 04:30:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:13,595 INFO L225 Difference]: With dead ends: 13015 [2023-04-01 04:30:13,596 INFO L226 Difference]: Without dead ends: 8448 [2023-04-01 04:30:13,605 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 04:30:13,608 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3805 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6861 mSolverCounterSat, 1738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 8599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1738 IncrementalHoareTripleChecker+Valid, 6861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:13,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 184 Invalid, 8599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1738 Valid, 6861 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-04-01 04:30:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8448 states. [2023-04-01 04:30:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8448 to 8256. [2023-04-01 04:30:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5527950310559007) internal successors, (12500), 8078 states have internal predecessors, (12500), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 04:30:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13131 transitions. [2023-04-01 04:30:13,786 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13131 transitions. Word has length 29 [2023-04-01 04:30:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:13,786 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13131 transitions. [2023-04-01 04:30:13,786 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 04:30:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13131 transitions. [2023-04-01 04:30:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:30:13,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:13,788 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] [2023-04-01 04:30:13,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:30:13,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:13,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash 108610185, now seen corresponding path program 1 times [2023-04-01 04:30:13,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:13,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37177833] [2023-04-01 04:30:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:13,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:13,895 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 04:30:13,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37177833] [2023-04-01 04:30:13,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37177833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:13,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:13,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572091755] [2023-04-01 04:30:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:13,897 INFO L87 Difference]: Start difference. First operand 8256 states and 13131 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:30:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:20,725 INFO L93 Difference]: Finished difference Result 20280 states and 33198 transitions. [2023-04-01 04:30:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-01 04:30:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:20,781 INFO L225 Difference]: With dead ends: 20280 [2023-04-01 04:30:20,781 INFO L226 Difference]: Without dead ends: 12029 [2023-04-01 04:30:20,804 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 04:30:20,808 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 3829 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 7302 mSolverCounterSat, 1892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 9194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1892 IncrementalHoareTripleChecker+Valid, 7302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:20,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 160 Invalid, 9194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1892 Valid, 7302 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-04-01 04:30:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12029 states. [2023-04-01 04:30:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12029 to 11932. [2023-04-01 04:30:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11589 states have (on average 1.4745016826300803) internal successors, (17088), 11643 states have internal predecessors, (17088), 53 states have call successors, (53), 53 states have call predecessors, (53), 289 states have return successors, (1291), 235 states have call predecessors, (1291), 52 states have call successors, (1291) [2023-04-01 04:30:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 18432 transitions. [2023-04-01 04:30:21,049 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 18432 transitions. Word has length 30 [2023-04-01 04:30:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:21,049 INFO L495 AbstractCegarLoop]: Abstraction has 11932 states and 18432 transitions. [2023-04-01 04:30:21,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:30:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 18432 transitions. [2023-04-01 04:30:21,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:30:21,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:21,052 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] [2023-04-01 04:30:21,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:30:21,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:21,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -297583301, now seen corresponding path program 1 times [2023-04-01 04:30:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618933202] [2023-04-01 04:30:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:21,156 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 04:30:21,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618933202] [2023-04-01 04:30:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618933202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:21,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:21,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263307347] [2023-04-01 04:30:21,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:21,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:21,162 INFO L87 Difference]: Start difference. First operand 11932 states and 18432 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)