/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_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:16:17,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:16:17,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:16:17,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:16:17,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:16:17,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:16:17,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:16:17,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:16:17,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:16:17,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:16:17,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:16:17,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:16:17,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:16:17,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:16:17,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:16:17,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:16:17,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:16:17,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:16:17,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:16:17,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:16:17,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:16:17,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:16:17,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:16:17,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:16:17,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:16:17,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:16:17,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:16:17,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:16:17,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:16:17,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:16:17,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:16:17,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:16:17,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:16:17,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:16:17,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:16:17,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:16:17,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:16:17,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:16:17,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:16:17,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:16:17,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:16:17,324 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 21:16:17,337 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:16:17,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:16:17,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:16:17,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:16:17,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:16:17,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:16:17,338 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:16:17,338 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:16:17,339 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:16:17,339 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:16:17,340 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:16:17,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:16:17,340 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:16:17,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:16:17,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:16:17,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:16:17,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:16:17,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:16:17,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:16:17,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:16:17,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:16:17,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:16:17,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:16:17,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:16:17,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:16:17,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:16:17,547 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:16:17,547 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:16:17,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label49.c [2023-03-31 21:16:18,531 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:16:18,746 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:16:18,746 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label49.c [2023-03-31 21:16:18,769 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8678afaa4/7f61d236bc3d4368bc0f23cc78e82518/FLAG140a0c78c [2023-03-31 21:16:18,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8678afaa4/7f61d236bc3d4368bc0f23cc78e82518 [2023-03-31 21:16:18,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:16:18,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:16:18,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:16:18,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:16:18,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:16:18,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c9b987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18, skipping insertion in model container [2023-03-31 21:16:18,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:16:18,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:16:19,097 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_label49.c[19626,19639] [2023-03-31 21:16:19,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:16:19,118 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:16:19,193 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_label49.c[19626,19639] [2023-03-31 21:16:19,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:16:19,214 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:16:19,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19 WrapperNode [2023-03-31 21:16:19,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:16:19,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:16:19,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:16:19,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:16:19,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,275 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:16:19,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:16:19,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:16:19,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:16:19,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (1/1) ... [2023-03-31 21:16:19,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:16:19,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:19,309 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 21:16:19,318 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 21:16:19,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:16:19,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:16:19,341 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:16:19,341 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:16:19,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:16:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:16:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:16:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:16:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:16:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:16:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:16:19,392 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:16:19,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:16:20,100 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:16:20,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:16:20,299 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:16:20,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:16:20 BoogieIcfgContainer [2023-03-31 21:16:20,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:16:20,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:16:20,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:16:20,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:16:20,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:16:18" (1/3) ... [2023-03-31 21:16:20,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bafb284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:16:20, skipping insertion in model container [2023-03-31 21:16:20,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:19" (2/3) ... [2023-03-31 21:16:20,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bafb284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:16:20, skipping insertion in model container [2023-03-31 21:16:20,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:16:20" (3/3) ... [2023-03-31 21:16:20,309 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label49.c [2023-03-31 21:16:20,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:16:20,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:16:20,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:16:20,366 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;@ebcc8f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:16:20,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:16:20,369 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 21:16:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:16:20,377 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:20,378 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 21:16:20,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:20,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2027405608, now seen corresponding path program 1 times [2023-03-31 21:16:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:20,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484812969] [2023-03-31 21:16:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:20,899 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 21:16:20,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:20,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484812969] [2023-03-31 21:16:20,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484812969] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:20,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:20,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:16:20,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858302347] [2023-03-31 21:16:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:20,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:16:20,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:16:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:20,936 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 21:16:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:21,319 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:16:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:16:21,321 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 21:16:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:21,331 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:16:21,331 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:16:21,334 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 21:16:21,337 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:21,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 44 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:16:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:16:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 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 21:16:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-03-31 21:16:21,389 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-03-31 21:16:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:21,390 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-03-31 21:16:21,390 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 21:16:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-03-31 21:16:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-31 21:16:21,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:21,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:21,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:16:21,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:21,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash -78195036, now seen corresponding path program 1 times [2023-03-31 21:16:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:21,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84389622] [2023-03-31 21:16:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:21,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84389622] [2023-03-31 21:16:21,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84389622] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:21,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:21,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:21,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704941485] [2023-03-31 21:16:21,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:21,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:21,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:21,848 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 21:16:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:22,254 INFO L93 Difference]: Finished difference Result 537 states and 970 transitions. [2023-03-31 21:16:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:16:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-03-31 21:16:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:22,258 INFO L225 Difference]: With dead ends: 537 [2023-03-31 21:16:22,258 INFO L226 Difference]: Without dead ends: 367 [2023-03-31 21:16:22,264 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 21:16:22,266 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 270 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:22,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 46 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-03-31 21:16:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2023-03-31 21:16:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.6253687315634218) internal successors, (551), 347 states have internal predecessors, (551), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-03-31 21:16:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 584 transitions. [2023-03-31 21:16:22,302 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 584 transitions. Word has length 94 [2023-03-31 21:16:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:22,302 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 584 transitions. [2023-03-31 21:16:22,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 21:16:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 584 transitions. [2023-03-31 21:16:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 21:16:22,304 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:22,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:22,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:16:22,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:22,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:22,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1643547018, now seen corresponding path program 1 times [2023-03-31 21:16:22,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279854787] [2023-03-31 21:16:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:22,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:22,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279854787] [2023-03-31 21:16:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279854787] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:22,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60502397] [2023-03-31 21:16:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:22,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:22,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:22,487 INFO L87 Difference]: Start difference. First operand 359 states and 584 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 21:16:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:22,845 INFO L93 Difference]: Finished difference Result 1103 states and 1863 transitions. [2023-03-31 21:16:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:16:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 97 [2023-03-31 21:16:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:22,848 INFO L225 Difference]: With dead ends: 1103 [2023-03-31 21:16:22,848 INFO L226 Difference]: Without dead ends: 749 [2023-03-31 21:16:22,849 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 21:16:22,850 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 290 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:22,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 44 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-03-31 21:16:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 725. [2023-03-31 21:16:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 682 states have (on average 1.5557184750733137) internal successors, (1061), 705 states have internal predecessors, (1061), 10 states have call successors, (10), 10 states have call predecessors, (10), 32 states have return successors, (99), 9 states have call predecessors, (99), 9 states have call successors, (99) [2023-03-31 21:16:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1170 transitions. [2023-03-31 21:16:22,874 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1170 transitions. Word has length 97 [2023-03-31 21:16:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1170 transitions. [2023-03-31 21:16:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 21:16:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1170 transitions. [2023-03-31 21:16:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 21:16:22,876 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:22,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:22,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:16:22,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:22,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:22,877 INFO L85 PathProgramCache]: Analyzing trace with hash -4784656, now seen corresponding path program 1 times [2023-03-31 21:16:22,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:22,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324483764] [2023-03-31 21:16:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:22,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:23,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:23,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324483764] [2023-03-31 21:16:23,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324483764] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:23,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:23,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:23,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113705055] [2023-03-31 21:16:23,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:23,009 INFO L87 Difference]: Start difference. First operand 725 states and 1170 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 21:16:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:23,341 INFO L93 Difference]: Finished difference Result 2037 states and 3508 transitions. [2023-03-31 21:16:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:16:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 100 [2023-03-31 21:16:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:23,365 INFO L225 Difference]: With dead ends: 2037 [2023-03-31 21:16:23,365 INFO L226 Difference]: Without dead ends: 1317 [2023-03-31 21:16:23,367 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 21:16:23,367 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:23,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 42 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2023-03-31 21:16:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1269. [2023-03-31 21:16:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1194 states have (on average 1.4003350083752093) internal successors, (1672), 1237 states have internal predecessors, (1672), 16 states have call successors, (16), 16 states have call predecessors, (16), 58 states have return successors, (232), 15 states have call predecessors, (232), 15 states have call successors, (232) [2023-03-31 21:16:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1920 transitions. [2023-03-31 21:16:23,400 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1920 transitions. Word has length 100 [2023-03-31 21:16:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:23,400 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 1920 transitions. [2023-03-31 21:16:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 21:16:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1920 transitions. [2023-03-31 21:16:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-03-31 21:16:23,403 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:23,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:16:23,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:23,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1875734227, now seen corresponding path program 1 times [2023-03-31 21:16:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:23,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329747567] [2023-03-31 21:16:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:23,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:23,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329747567] [2023-03-31 21:16:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329747567] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:23,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:23,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:23,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634238332] [2023-03-31 21:16:23,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:23,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:23,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:23,558 INFO L87 Difference]: Start difference. First operand 1269 states and 1920 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 21:16:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:23,897 INFO L93 Difference]: Finished difference Result 2927 states and 4504 transitions. [2023-03-31 21:16:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:16:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 114 [2023-03-31 21:16:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:23,906 INFO L225 Difference]: With dead ends: 2927 [2023-03-31 21:16:23,907 INFO L226 Difference]: Without dead ends: 1663 [2023-03-31 21:16:23,909 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 21:16:23,911 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 259 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:23,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 44 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-03-31 21:16:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1639. [2023-03-31 21:16:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1539 states have (on average 1.3170890188434048) internal successors, (2027), 1599 states have internal predecessors, (2027), 20 states have call successors, (20), 20 states have call predecessors, (20), 79 states have return successors, (296), 19 states have call predecessors, (296), 19 states have call successors, (296) [2023-03-31 21:16:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2343 transitions. [2023-03-31 21:16:23,980 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2343 transitions. Word has length 114 [2023-03-31 21:16:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:23,981 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2343 transitions. [2023-03-31 21:16:23,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 21:16:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2343 transitions. [2023-03-31 21:16:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-31 21:16:23,984 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:23,984 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:16:23,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:16:23,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:23,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -936025495, now seen corresponding path program 1 times [2023-03-31 21:16:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419422795] [2023-03-31 21:16:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:24,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:24,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419422795] [2023-03-31 21:16:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419422795] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204135964] [2023-03-31 21:16:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:24,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:24,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:24,431 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 21:16:24,432 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 21:16:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:24,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:16:24,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:16:24,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:16:24,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204135964] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:24,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:16:24,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 21:16:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454863853] [2023-03-31 21:16:24,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:16:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:16:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:16:24,628 INFO L87 Difference]: Start difference. First operand 1639 states and 2343 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:16:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:24,876 INFO L93 Difference]: Finished difference Result 3891 states and 5732 transitions. [2023-03-31 21:16:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:16:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 121 [2023-03-31 21:16:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:24,884 INFO L225 Difference]: With dead ends: 3891 [2023-03-31 21:16:24,884 INFO L226 Difference]: Without dead ends: 2257 [2023-03-31 21:16:24,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:16:24,887 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:24,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:16:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2023-03-31 21:16:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2023-03-31 21:16:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2128 states have (on average 1.3209586466165413) internal successors, (2811), 2203 states have internal predecessors, (2811), 27 states have call successors, (27), 27 states have call predecessors, (27), 101 states have return successors, (473), 26 states have call predecessors, (473), 26 states have call successors, (473) [2023-03-31 21:16:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3311 transitions. [2023-03-31 21:16:24,932 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3311 transitions. Word has length 121 [2023-03-31 21:16:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:24,933 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3311 transitions. [2023-03-31 21:16:24,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:16:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3311 transitions. [2023-03-31 21:16:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-03-31 21:16:24,937 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:24,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:16:25,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:16:25,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:25,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1543359541, now seen corresponding path program 1 times [2023-03-31 21:16:25,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:25,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958794163] [2023-03-31 21:16:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:25,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:25,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:25,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958794163] [2023-03-31 21:16:25,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958794163] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:25,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358332315] [2023-03-31 21:16:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:25,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:25,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:25,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:16:25,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:16:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:25,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:16:25,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:25,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:16:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358332315] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:16:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705040844] [2023-03-31 21:16:25,518 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:16:25,518 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:16:25,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:16:25,523 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:16:25,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:16:25,651 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:16:26,257 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 75 for LOIs