/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/Problem02_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:13:40,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:13:40,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:13:40,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:13:40,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:13:40,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:13:40,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:13:40,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:13:40,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:13:40,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:13:40,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:13:40,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:13:40,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:13:40,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:13:40,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:13:40,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:13:40,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:13:40,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:13:40,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:13:40,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:13:40,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:13:40,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:13:40,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:13:40,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:13:40,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:13:40,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:13:40,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:13:40,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:13:40,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:13:40,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:13:40,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:13:40,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:13:40,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:13:40,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:13:40,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:13:40,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:13:40,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:13:40,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:13:40,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:13:40,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:13:40,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:13:40,471 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 21:13:40,488 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:13:40,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:13:40,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:13:40,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:13:40,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:13:40,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:13:40,490 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:13:40,490 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:13:40,490 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:13:40,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:13:40,490 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:13:40,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:13:40,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:13:40,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:13:40,491 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:13:40,491 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:13:40,491 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:13:40,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:13:40,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:13:40,492 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:13:40,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:13:40,493 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:13:40,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:13:40,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:13:40,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:13:40,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:13:40,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:13:40,494 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:13:40,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:13:40,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:13:40,495 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:13:40,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:13:40,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:13:40,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:13:40,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:13:40,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:13:40,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:13:40,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:13:40,749 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:13:40,750 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:13:40,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label17.c [2023-03-31 21:13:41,879 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:13:42,123 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:13:42,124 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label17.c [2023-03-31 21:13:42,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6197d6406/f8aed603110842beb69e7a89e69fe834/FLAGed23e3aec [2023-03-31 21:13:42,161 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6197d6406/f8aed603110842beb69e7a89e69fe834 [2023-03-31 21:13:42,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:13:42,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:13:42,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:13:42,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:13:42,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:13:42,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fb3af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42, skipping insertion in model container [2023-03-31 21:13:42,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:13:42,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:13:42,488 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/Problem02_label17.c[18943,18956] [2023-03-31 21:13:42,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:13:42,526 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:13:42,620 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/Problem02_label17.c[18943,18956] [2023-03-31 21:13:42,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:13:42,642 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:13:42,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42 WrapperNode [2023-03-31 21:13:42,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:13:42,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:13:42,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:13:42,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:13:42,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:13:42,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:13:42,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:13:42,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:13:42,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (1/1) ... [2023-03-31 21:13:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:13:42,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:13:42,810 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 21:13:42,830 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 21:13:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:13:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:13:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:13:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:13:42,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:13:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:13:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:13:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:13:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:13:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:13:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:13:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:13:42,940 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:13:42,942 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:13:43,813 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:13:44,072 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:13:44,074 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:13:44,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:13:44 BoogieIcfgContainer [2023-03-31 21:13:44,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:13:44,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:13:44,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:13:44,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:13:44,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:13:42" (1/3) ... [2023-03-31 21:13:44,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a96c750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:13:44, skipping insertion in model container [2023-03-31 21:13:44,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:42" (2/3) ... [2023-03-31 21:13:44,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a96c750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:13:44, skipping insertion in model container [2023-03-31 21:13:44,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:13:44" (3/3) ... [2023-03-31 21:13:44,086 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label17.c [2023-03-31 21:13:44,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:13:44,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:13:44,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:13:44,164 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;@1f118a58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:13:44,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:13:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:13:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:13:44,181 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:44,182 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] [2023-03-31 21:13:44,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:44,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash -818164905, now seen corresponding path program 1 times [2023-03-31 21:13:44,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:44,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863580588] [2023-03-31 21:13:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:44,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:44,751 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 21:13:44,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:44,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863580588] [2023-03-31 21:13:44,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863580588] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:44,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:44,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:13:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656533700] [2023-03-31 21:13:44,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:44,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:13:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:13:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:13:44,793 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2023-03-31 21:13:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:45,191 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:13:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:13:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-03-31 21:13:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:45,208 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:13:45,209 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:13:45,213 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 [2023-03-31 21:13:45,219 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:45,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:13:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:13:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:13:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.7544910179640718) internal successors, (293), 167 states have internal predecessors, (293), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:13:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 302 transitions. [2023-03-31 21:13:45,329 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 302 transitions. Word has length 86 [2023-03-31 21:13:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:45,331 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 302 transitions. [2023-03-31 21:13:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2023-03-31 21:13:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 302 transitions. [2023-03-31 21:13:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 21:13:45,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:45,341 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] [2023-03-31 21:13:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:13:45,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:45,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash 242738886, now seen corresponding path program 1 times [2023-03-31 21:13:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:45,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928516901] [2023-03-31 21:13:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:45,606 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 21:13:45,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928516901] [2023-03-31 21:13:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928516901] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:45,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:45,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:45,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057734521] [2023-03-31 21:13:45,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:45,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:45,610 INFO L87 Difference]: Start difference. First operand 175 states and 302 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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) [2023-03-31 21:13:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:46,034 INFO L93 Difference]: Finished difference Result 537 states and 947 transitions. [2023-03-31 21:13:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:13:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-03-31 21:13:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:46,040 INFO L225 Difference]: With dead ends: 537 [2023-03-31 21:13:46,041 INFO L226 Difference]: Without dead ends: 367 [2023-03-31 21:13:46,042 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 21:13:46,043 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:46,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 97 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:13:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-03-31 21:13:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 351. [2023-03-31 21:13:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.6746268656716419) internal successors, (561), 339 states have internal predecessors, (561), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-31 21:13:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 588 transitions. [2023-03-31 21:13:46,067 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 588 transitions. Word has length 108 [2023-03-31 21:13:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:46,067 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 588 transitions. [2023-03-31 21:13:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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) [2023-03-31 21:13:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 588 transitions. [2023-03-31 21:13:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 21:13:46,070 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:46,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:13:46,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:13:46,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:46,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1171127894, now seen corresponding path program 1 times [2023-03-31 21:13:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:46,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439816290] [2023-03-31 21:13:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:46,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:46,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439816290] [2023-03-31 21:13:46,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439816290] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:46,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:46,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:46,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434512416] [2023-03-31 21:13:46,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:46,322 INFO L87 Difference]: Start difference. First operand 351 states and 588 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-03-31 21:13:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:46,783 INFO L93 Difference]: Finished difference Result 1091 states and 1910 transitions. [2023-03-31 21:13:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:13:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 119 [2023-03-31 21:13:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:46,790 INFO L225 Difference]: With dead ends: 1091 [2023-03-31 21:13:46,790 INFO L226 Difference]: Without dead ends: 745 [2023-03-31 21:13:46,792 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 21:13:46,797 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:46,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 48 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:13:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-03-31 21:13:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 721. [2023-03-31 21:13:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 680 states have (on average 1.575) internal successors, (1071), 701 states have internal predecessors, (1071), 10 states have call successors, (10), 10 states have call predecessors, (10), 30 states have return successors, (87), 9 states have call predecessors, (87), 9 states have call successors, (87) [2023-03-31 21:13:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1168 transitions. [2023-03-31 21:13:46,838 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1168 transitions. Word has length 119 [2023-03-31 21:13:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:46,839 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1168 transitions. [2023-03-31 21:13:46,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-03-31 21:13:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1168 transitions. [2023-03-31 21:13:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 21:13:46,841 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:46,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 21:13:46,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:13:46,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:46,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1877087646, now seen corresponding path program 1 times [2023-03-31 21:13:46,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:46,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287797459] [2023-03-31 21:13:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:13:47,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:47,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287797459] [2023-03-31 21:13:47,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287797459] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:13:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112882478] [2023-03-31 21:13:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:47,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:13:47,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:13:47,380 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) [2023-03-31 21:13:47,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:13:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:47,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:13:47,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:13:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:47,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:13:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:47,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112882478] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:13:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414975718] [2023-03-31 21:13:47,824 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:13:47,824 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:13:47,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:13:47,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:13:47,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:13:48,116 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:13:49,383 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 76 for LOIs