/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem05_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:30:40,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:30:40,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:30:40,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:30:40,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:30:40,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:30:40,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:30:40,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:30:40,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:30:40,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:30:40,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:30:40,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:30:40,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:30:40,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:30:40,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:30:40,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:30:40,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:30:40,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:30:40,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:30:40,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:30:40,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:30:40,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:30:40,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:30:40,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:30:40,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:30:40,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:30:40,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:30:40,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:30:40,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:30:40,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:30:40,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:30:40,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:30:40,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:30:40,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:30:40,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:30:40,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:30:40,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:30:40,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:30:40,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:30:40,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:30:40,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:30:40,637 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 [2023-03-31 21:30:40,654 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:30:40,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:30:40,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:30:40,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:30:40,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:30:40,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:30:40,656 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:30:40,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:30:40,656 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:30:40,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:30:40,657 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:30:40,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:30:40,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:30:40,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:30:40,658 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:30:40,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:30:40,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:30:40,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:30:40,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:30:40,658 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:30:40,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:30:40,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:30:40,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:30:40,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:30:40,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:30:40,660 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:30:40,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:30:40,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:30:40,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:30:40,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:30:40,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:30:40,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:30:40,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:30:40,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:30:40,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:30:40,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:30:40,866 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:30:40,866 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:30:40,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem05_label59.c [2023-03-31 21:30:41,949 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:30:42,395 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:30:42,396 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label59.c [2023-03-31 21:30:42,422 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5846bef3/21f57d1b940947acaffca6945d517d14/FLAGc89c99614 [2023-03-31 21:30:42,436 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5846bef3/21f57d1b940947acaffca6945d517d14 [2023-03-31 21:30:42,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:30:42,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:30:42,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:30:42,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:30:42,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:30:42,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:30:42" (1/1) ... [2023-03-31 21:30:42,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bdc4538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:42, skipping insertion in model container [2023-03-31 21:30:42,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:30:42" (1/1) ... [2023-03-31 21:30:42,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:30:42,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:30:43,734 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/Problem05_label59.c[377810,377823] [2023-03-31 21:30:43,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:30:43,757 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:30:44,295 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/Problem05_label59.c[377810,377823] [2023-03-31 21:30:44,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:30:44,385 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:30:44,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44 WrapperNode [2023-03-31 21:30:44,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:30:44,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:30:44,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:30:44,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:30:44,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:30:44,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:30:44,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:30:44,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:30:44,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (1/1) ... [2023-03-31 21:30:44,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:30:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:30:44,782 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) [2023-03-31 21:30:44,796 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 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2023-03-31 21:30:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:30:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:30:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:30:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:30:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:30:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:30:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:30:44,903 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:30:44,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:30:49,905 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:30:51,101 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:30:51,101 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:30:51,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:30:51 BoogieIcfgContainer [2023-03-31 21:30:51,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:30:51,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:30:51,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:30:51,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:30:51,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:30:42" (1/3) ... [2023-03-31 21:30:51,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3849f460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:30:51, skipping insertion in model container [2023-03-31 21:30:51,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:30:44" (2/3) ... [2023-03-31 21:30:51,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3849f460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:30:51, skipping insertion in model container [2023-03-31 21:30:51,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:30:51" (3/3) ... [2023-03-31 21:30:51,110 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label59.c [2023-03-31 21:30:51,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:30:51,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:30:51,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:30:51,216 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;@34f305a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:30:51,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:30:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 21:30:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1652 [2023-03-31 21:30:51,297 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:30:51,299 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:30:51,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:30:51,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:30:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash -710327422, now seen corresponding path program 1 times [2023-03-31 21:30:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:30:51,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962890345] [2023-03-31 21:30:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:30:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:30:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:30:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:30:58,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:30:58,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962890345] [2023-03-31 21:30:58,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962890345] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:30:58,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:30:58,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:30:58,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461523313] [2023-03-31 21:30:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:30:58,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:30:58,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:30:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:30:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:30:58,153 INFO L87 Difference]: Start difference. First operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:31:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:31:03,378 INFO L93 Difference]: Finished difference Result 5031 states and 9947 transitions. [2023-03-31 21:31:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:31:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1651 [2023-03-31 21:31:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:31:03,410 INFO L225 Difference]: With dead ends: 5031 [2023-03-31 21:31:03,410 INFO L226 Difference]: Without dead ends: 3347 [2023-03-31 21:31:03,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:31:03,436 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 81 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5637 mSolverCounterSat, 1604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 7241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1604 IncrementalHoareTripleChecker+Valid, 5637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:31:03,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 188 Invalid, 7241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1604 Valid, 5637 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-03-31 21:31:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2023-03-31 21:31:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3347. [2023-03-31 21:31:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 3311 states have (on average 1.9553005134400483) internal successors, (6474), 3311 states have internal predecessors, (6474), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2023-03-31 21:31:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 6525 transitions. [2023-03-31 21:31:03,569 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 6525 transitions. Word has length 1651 [2023-03-31 21:31:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:31:03,573 INFO L495 AbstractCegarLoop]: Abstraction has 3347 states and 6525 transitions. [2023-03-31 21:31:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:31:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 6525 transitions. [2023-03-31 21:31:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1662 [2023-03-31 21:31:03,628 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:31:03,629 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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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, 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, 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] [2023-03-31 21:31:03,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:31:03,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:31:03,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:31:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash -858456990, now seen corresponding path program 1 times [2023-03-31 21:31:03,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:31:03,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624081460] [2023-03-31 21:31:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:31:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:31:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:31:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:31:06,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:31:06,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624081460] [2023-03-31 21:31:06,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624081460] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:31:06,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:31:06,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:31:06,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801108838] [2023-03-31 21:31:06,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:31:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:31:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:31:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:31:06,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:31:06,503 INFO L87 Difference]: Start difference. First operand 3347 states and 6525 transitions. Second operand has 5 states, 5 states have (on average 329.6) internal successors, (1648), 4 states have internal predecessors, (1648), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:31:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:31:12,720 INFO L93 Difference]: Finished difference Result 10238 states and 19971 transitions. [2023-03-31 21:31:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:31:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 329.6) internal successors, (1648), 4 states have internal predecessors, (1648), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1661 [2023-03-31 21:31:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:31:12,770 INFO L225 Difference]: With dead ends: 10238 [2023-03-31 21:31:12,770 INFO L226 Difference]: Without dead ends: 6896 [2023-03-31 21:31:12,785 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 [2023-03-31 21:31:12,787 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 6651 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 9133 mSolverCounterSat, 2715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6651 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 11848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2715 IncrementalHoareTripleChecker+Valid, 9133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-03-31 21:31:12,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6651 Valid, 210 Invalid, 11848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2715 Valid, 9133 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-03-31 21:31:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6896 states. [2023-03-31 21:31:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6896 to 6825. [2023-03-31 21:31:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6825 states, 6709 states have (on average 1.8132359517066627) internal successors, (12165), 6715 states have internal predecessors, (12165), 34 states have call successors, (34), 34 states have call predecessors, (34), 81 states have return successors, (209), 75 states have call predecessors, (209), 33 states have call successors, (209) [2023-03-31 21:31:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 12408 transitions. [2023-03-31 21:31:12,989 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 12408 transitions. Word has length 1661 [2023-03-31 21:31:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:31:12,990 INFO L495 AbstractCegarLoop]: Abstraction has 6825 states and 12408 transitions. [2023-03-31 21:31:12,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 329.6) internal successors, (1648), 4 states have internal predecessors, (1648), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:31:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 12408 transitions. [2023-03-31 21:31:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1663 [2023-03-31 21:31:13,015 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:31:13,015 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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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] [2023-03-31 21:31:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:31:13,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:31:13,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:31:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1826235941, now seen corresponding path program 1 times [2023-03-31 21:31:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:31:13,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296636180] [2023-03-31 21:31:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:31:13,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:31:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:31:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:31:16,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:31:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296636180] [2023-03-31 21:31:16,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296636180] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:31:16,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:31:16,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:31:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533540096] [2023-03-31 21:31:16,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:31:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:31:16,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:31:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:31:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:31:16,419 INFO L87 Difference]: Start difference. First operand 6825 states and 12408 transitions. Second operand has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:31:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:31:20,977 INFO L93 Difference]: Finished difference Result 20434 states and 37684 transitions. [2023-03-31 21:31:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:31:20,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1662 [2023-03-31 21:31:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:31:21,065 INFO L225 Difference]: With dead ends: 20434 [2023-03-31 21:31:21,066 INFO L226 Difference]: Without dead ends: 13614 [2023-03-31 21:31:21,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:31:21,076 INFO L413 NwaCegarLoop]: 3111 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 2038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2038 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:31:21,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3166 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2038 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-31 21:31:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13614 states. [2023-03-31 21:31:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13614 to 13614. [2023-03-31 21:31:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13614 states, 13396 states have (on average 1.5053747387279786) internal successors, (20166), 13407 states have internal predecessors, (20166), 66 states have call successors, (66), 66 states have call predecessors, (66), 151 states have return successors, (715), 140 states have call predecessors, (715), 65 states have call successors, (715) [2023-03-31 21:31:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13614 states to 13614 states and 20947 transitions. [2023-03-31 21:31:21,342 INFO L78 Accepts]: Start accepts. Automaton has 13614 states and 20947 transitions. Word has length 1662 [2023-03-31 21:31:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:31:21,344 INFO L495 AbstractCegarLoop]: Abstraction has 13614 states and 20947 transitions. [2023-03-31 21:31:21,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:31:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13614 states and 20947 transitions. [2023-03-31 21:31:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1665 [2023-03-31 21:31:21,384 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:31:21,384 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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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, 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, 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] [2023-03-31 21:31:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:31:21,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:31:21,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:31:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 110217260, now seen corresponding path program 1 times [2023-03-31 21:31:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:31:21,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318383240] [2023-03-31 21:31:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:31:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:31:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:31:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:31:22,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:31:22,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318383240] [2023-03-31 21:31:22,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318383240] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:31:22,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:31:22,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:31:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984552663] [2023-03-31 21:31:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:31:22,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:31:22,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:31:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:31:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:31:22,815 INFO L87 Difference]: Start difference. First operand 13614 states and 20947 transitions. Second operand has 5 states, 5 states have (on average 330.2) internal successors, (1651), 4 states have internal predecessors, (1651), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:31:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:31:28,351 INFO L93 Difference]: Finished difference Result 41502 states and 66151 transitions. [2023-03-31 21:31:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:31:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 330.2) internal successors, (1651), 4 states have internal predecessors, (1651), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1664 [2023-03-31 21:31:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:31:28,500 INFO L225 Difference]: With dead ends: 41502 [2023-03-31 21:31:28,500 INFO L226 Difference]: Without dead ends: 27893 [2023-03-31 21:31:28,528 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 [2023-03-31 21:31:28,533 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 6905 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8521 mSolverCounterSat, 3333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6905 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 11854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3333 IncrementalHoareTripleChecker+Valid, 8521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:31:28,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6905 Valid, 186 Invalid, 11854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3333 Valid, 8521 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-31 21:31:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27893 states. [2023-03-31 21:31:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27893 to 27780. [2023-03-31 21:31:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27780 states, 27151 states have (on average 1.361238996722036) internal successors, (36959), 27205 states have internal predecessors, (36959), 130 states have call successors, (130), 130 states have call predecessors, (130), 498 states have return successors, (3254), 444 states have call predecessors, (3254), 129 states have call successors, (3254) [2023-03-31 21:31:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27780 states to 27780 states and 40343 transitions. [2023-03-31 21:31:29,143 INFO L78 Accepts]: Start accepts. Automaton has 27780 states and 40343 transitions. Word has length 1664 [2023-03-31 21:31:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:31:29,143 INFO L495 AbstractCegarLoop]: Abstraction has 27780 states and 40343 transitions. [2023-03-31 21:31:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 330.2) internal successors, (1651), 4 states have internal predecessors, (1651), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:31:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27780 states and 40343 transitions. [2023-03-31 21:31:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1674 [2023-03-31 21:31:29,215 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:31:29,216 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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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, 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, 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] [2023-03-31 21:31:29,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:31:29,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:31:29,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:31:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 79574691, now seen corresponding path program 1 times [2023-03-31 21:31:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:31:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349904675] [2023-03-31 21:31:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:31:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:31:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:31:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:31:32,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:31:32,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349904675] [2023-03-31 21:31:32,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349904675] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:31:32,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:31:32,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:31:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926914310] [2023-03-31 21:31:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:31:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:31:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:31:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:31:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:31:32,537 INFO L87 Difference]: Start difference. First operand 27780 states and 40343 transitions. Second operand has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)