/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:00:15,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:00:15,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:00:15,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:00:15,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:00:15,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:00:15,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:00:15,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:00:15,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:00:15,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:00:15,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:00:15,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:00:15,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:00:15,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:00:15,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:00:15,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:00:15,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:00:15,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:00:15,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:00:15,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:00:15,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:00:15,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:00:15,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:00:15,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:00:15,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:00:15,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:00:15,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:00:15,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:00:15,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:00:15,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:00:15,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:00:15,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:00:15,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:00:15,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:00:15,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:00:15,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:00:15,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:00:15,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:00:15,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:00:15,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:00:15,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:00:15,448 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 04:00:15,464 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:00:15,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:00:15,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:00:15,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:00:15,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:00:15,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:00:15,465 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:00:15,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:00:15,465 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:00:15,466 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:00:15,466 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:00:15,467 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:00:15,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:00:15,467 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:00:15,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:00:15,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:00:15,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:00:15,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:00:15,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:00:15,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:00:15,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:00:15,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:00:15,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:00:15,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:00:15,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:00:15,638 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:00:15,639 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:00:15,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label13.c [2023-04-01 04:00:16,625 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:00:17,113 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:00:17,113 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label13.c [2023-04-01 04:00:17,131 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68eb2a713/9df9d2f4b2b445f892b03bb1a2f44909/FLAG657296df4 [2023-04-01 04:00:17,295 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68eb2a713/9df9d2f4b2b445f892b03bb1a2f44909 [2023-04-01 04:00:17,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:00:17,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:00:17,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:00:17,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:00:17,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:00:17,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:00:17" (1/1) ... [2023-04-01 04:00:17,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6058d1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:17, skipping insertion in model container [2023-04-01 04:00:17,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:00:17" (1/1) ... [2023-04-01 04:00:17,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:00:17,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:00:17,621 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label13.c[3765,3778] [2023-04-01 04:00:18,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:00:18,283 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:00:18,307 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label13.c[3765,3778] [2023-04-01 04:00:18,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:00:18,655 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:00:18,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18 WrapperNode [2023-04-01 04:00:18,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:00:18,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:00:18,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:00:18,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:00:18,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,812 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:00:18,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:00:18,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:00:18,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:00:18,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (1/1) ... [2023-04-01 04:00:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:00:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:18,912 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 04:00:18,933 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 04:00:18,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:00:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:00:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:00:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:00:19,005 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:00:19,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:00:22,009 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:00:22,432 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:00:22,432 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:00:22,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:00:22 BoogieIcfgContainer [2023-04-01 04:00:22,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:00:22,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:00:22,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:00:22,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:00:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:00:17" (1/3) ... [2023-04-01 04:00:22,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cc90f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:00:22, skipping insertion in model container [2023-04-01 04:00:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:00:18" (2/3) ... [2023-04-01 04:00:22,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cc90f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:00:22, skipping insertion in model container [2023-04-01 04:00:22,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:00:22" (3/3) ... [2023-04-01 04:00:22,443 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label13.c [2023-04-01 04:00:22,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:00:22,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:00:22,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:00:22,516 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;@5bac469, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:00:22,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:00:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:00:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:00:22,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:22,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:22,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:22,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash 636339201, now seen corresponding path program 1 times [2023-04-01 04:00:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:22,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320918377] [2023-04-01 04:00:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:22,923 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 04:00:22,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:22,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320918377] [2023-04-01 04:00:22,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320918377] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:22,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:22,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:00:22,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596498013] [2023-04-01 04:00:22,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:00:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:00:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:00:22,960 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:00:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:25,753 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:00:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:00:25,757 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 04:00:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:25,791 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:00:25,791 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:00:25,811 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 04:00:25,815 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 789 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:25,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 155 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:00:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:00:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357. [2023-04-01 04:00:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1339 states have (on average 1.9066467513069454) internal successors, (2553), 1339 states have internal predecessors, (2553), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:00:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions. [2023-04-01 04:00:25,938 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11 [2023-04-01 04:00:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:25,938 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions. [2023-04-01 04:00:25,939 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 04:00:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions. [2023-04-01 04:00:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:00:25,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:25,940 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 04:00:25,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:00:25,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:25,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -44851196, now seen corresponding path program 1 times [2023-04-01 04:00:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:25,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077750718] [2023-04-01 04:00:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:26,195 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 04:00:26,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077750718] [2023-04-01 04:00:26,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077750718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:26,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:26,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:00:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257463964] [2023-04-01 04:00:26,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:00:26,199 INFO L87 Difference]: Start difference. First operand 1357 states and 2576 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 04:00:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:29,563 INFO L93 Difference]: Finished difference Result 4113 states and 7854 transitions. [2023-04-01 04:00:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:00:29,563 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 04:00:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:29,575 INFO L225 Difference]: With dead ends: 4113 [2023-04-01 04:00:29,575 INFO L226 Difference]: Without dead ends: 2761 [2023-04-01 04:00:29,582 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 04:00:29,584 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2449 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2449 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:29,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2449 Valid, 108 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 04:00:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2023-04-01 04:00:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2723. [2023-04-01 04:00:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 2681 states have (on average 1.7582991421111525) internal successors, (4714), 2685 states have internal predecessors, (4714), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-04-01 04:00:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4803 transitions. [2023-04-01 04:00:29,661 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 4803 transitions. Word has length 25 [2023-04-01 04:00:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:29,662 INFO L495 AbstractCegarLoop]: Abstraction has 2723 states and 4803 transitions. [2023-04-01 04:00:29,662 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 04:00:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 4803 transitions. [2023-04-01 04:00:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:00:29,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:29,663 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] [2023-04-01 04:00:29,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:00:29,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:29,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1628814240, now seen corresponding path program 1 times [2023-04-01 04:00:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69421347] [2023-04-01 04:00:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:29,788 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 04:00:29,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69421347] [2023-04-01 04:00:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69421347] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:29,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:29,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:00:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681838107] [2023-04-01 04:00:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:00:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:00:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:00:29,789 INFO L87 Difference]: Start difference. First operand 2723 states and 4803 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:00:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:32,400 INFO L93 Difference]: Finished difference Result 8149 states and 14600 transitions. [2023-04-01 04:00:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:00:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-04-01 04:00:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:32,439 INFO L225 Difference]: With dead ends: 8149 [2023-04-01 04:00:32,439 INFO L226 Difference]: Without dead ends: 5431 [2023-04-01 04:00:32,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:00:32,463 INFO L413 NwaCegarLoop]: 1167 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:32,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1195 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 04:00:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2023-04-01 04:00:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 5428. [2023-04-01 04:00:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5352 states have (on average 1.6429372197309418) internal successors, (8793), 5360 states have internal predecessors, (8793), 27 states have call successors, (27), 27 states have call predecessors, (27), 48 states have return successors, (281), 40 states have call predecessors, (281), 26 states have call successors, (281) [2023-04-01 04:00:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 9101 transitions. [2023-04-01 04:00:32,658 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 9101 transitions. Word has length 27 [2023-04-01 04:00:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:32,659 INFO L495 AbstractCegarLoop]: Abstraction has 5428 states and 9101 transitions. [2023-04-01 04:00:32,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:00:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 9101 transitions. [2023-04-01 04:00:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 04:00:32,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:32,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:32,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:00:32,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:32,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 784997804, now seen corresponding path program 1 times [2023-04-01 04:00:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:32,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637782641] [2023-04-01 04:00:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:32,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:32,861 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 04:00:32,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:32,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637782641] [2023-04-01 04:00:32,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637782641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:00:32,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:00:32,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:00:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519526378] [2023-04-01 04:00:32,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:00:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:00:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:00:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:00:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:00:32,863 INFO L87 Difference]: Start difference. First operand 5428 states and 9101 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:00:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:00:36,125 INFO L93 Difference]: Finished difference Result 16572 states and 28805 transitions. [2023-04-01 04:00:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:00:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-04-01 04:00:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:00:36,183 INFO L225 Difference]: With dead ends: 16572 [2023-04-01 04:00:36,183 INFO L226 Difference]: Without dead ends: 11149 [2023-04-01 04:00:36,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:00:36,203 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2784 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2784 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:00:36,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2784 Valid, 88 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:00:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2023-04-01 04:00:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 8400. [2023-04-01 04:00:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8400 states, 8200 states have (on average 1.5396341463414633) internal successors, (12625), 8243 states have internal predecessors, (12625), 41 states have call successors, (41), 41 states have call predecessors, (41), 158 states have return successors, (960), 115 states have call predecessors, (960), 40 states have call successors, (960) [2023-04-01 04:00:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8400 states to 8400 states and 13626 transitions. [2023-04-01 04:00:36,453 INFO L78 Accepts]: Start accepts. Automaton has 8400 states and 13626 transitions. Word has length 37 [2023-04-01 04:00:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:00:36,454 INFO L495 AbstractCegarLoop]: Abstraction has 8400 states and 13626 transitions. [2023-04-01 04:00:36,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:00:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8400 states and 13626 transitions. [2023-04-01 04:00:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:00:36,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:00:36,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:00:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:00:36,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:00:36,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:00:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1425648285, now seen corresponding path program 1 times [2023-04-01 04:00:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:00:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532770254] [2023-04-01 04:00:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:00:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:36,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:00:36,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532770254] [2023-04-01 04:00:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532770254] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:00:36,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272588931] [2023-04-01 04:00:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:00:36,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:00:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:00:36,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:00:36,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:00:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:00:36,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:00:36,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:00:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:36,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:00:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:00:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272588931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:00:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618936094] [2023-04-01 04:00:36,869 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:00:36,870 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:00:36,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:00:36,875 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:00:36,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:00:37,133 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:00:37,376 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2023-04-01 04:00:37,882 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 36341 conjuctions. This might take some time... [2023-04-01 04:00:40,500 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 521 conjuctions. [2023-04-01 04:00:50,359 WARN L223 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 697 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 04:01:22,151 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39