/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:15:48,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:15:48,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:15:48,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:15:48,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:15:48,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:15:48,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:15:48,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:15:48,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:15:48,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:15:48,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:15:48,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:15:48,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:15:48,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:15:48,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:15:48,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:15:48,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:15:48,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:15:48,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:15:48,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:15:48,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:15:48,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:15:48,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:15:48,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:15:48,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:15:48,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:15:48,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:15:48,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:15:48,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:15:48,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:15:48,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:15:48,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:15:48,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:15:48,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:15:48,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:15:48,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:15:48,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:15:48,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:15:48,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:15:48,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:15:48,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:15:48,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:15:48,323 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:15:48,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:15:48,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:15:48,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:15:48,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:15:48,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:15:48,324 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:15:48,324 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:15:48,324 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:15:48,331 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:15:48,331 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:15:48,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:15:48,332 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:15:48,332 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:15:48,332 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:15:48,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:15:48,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:15:48,332 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:15:48,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:15:48,333 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:15:48,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:15:48,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:15:48,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:15:48,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:15:48,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:15:48,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:15:48,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:15:48,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:15:48,335 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:15:48,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:15:48,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:15:48,335 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:15:48,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:15:48,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:15:48,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:15:48,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:15:48,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:15:48,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:15:48,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:15:48,612 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:15:48,613 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:15:48,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2023-04-01 10:15:49,785 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:15:50,163 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:15:50,164 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2023-04-01 10:15:50,184 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d5092074/345129a3f4494799893519fdcd61cc48/FLAGe1dab8a29 [2023-04-01 10:15:50,200 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d5092074/345129a3f4494799893519fdcd61cc48 [2023-04-01 10:15:50,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:15:50,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:15:50,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:15:50,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:15:50,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:15:50,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:15:50" (1/1) ... [2023-04-01 10:15:50,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b2e314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:50, skipping insertion in model container [2023-04-01 10:15:50,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:15:50" (1/1) ... [2023-04-01 10:15:50,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:15:50,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:15:50,501 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/Problem15_label12.c[7168,7181] [2023-04-01 10:15:50,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:15:50,873 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:15:50,907 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/Problem15_label12.c[7168,7181] [2023-04-01 10:15:51,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:15:51,098 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:15:51,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51 WrapperNode [2023-04-01 10:15:51,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:15:51,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:15:51,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:15:51,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:15:51,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:15:51,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:15:51,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:15:51,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:15:51,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (1/1) ... [2023-04-01 10:15:51,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:15:51,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:51,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:15:51,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:15:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:15:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:15:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:15:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:15:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:15:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:15:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:15:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:15:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:15:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:15:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:15:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:15:51,423 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:15:51,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:15:53,806 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:15:54,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:15:54,543 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:15:54,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:15:54 BoogieIcfgContainer [2023-04-01 10:15:54,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:15:54,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:15:54,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:15:54,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:15:54,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:15:50" (1/3) ... [2023-04-01 10:15:54,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460e792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:15:54, skipping insertion in model container [2023-04-01 10:15:54,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:51" (2/3) ... [2023-04-01 10:15:54,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460e792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:15:54, skipping insertion in model container [2023-04-01 10:15:54,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:15:54" (3/3) ... [2023-04-01 10:15:54,556 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2023-04-01 10:15:54,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:15:54,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:15:54,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:15:54,626 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;@51dd8c39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:15:54,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:15:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:15:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:15:54,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:54,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:54,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:54,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash 271526150, now seen corresponding path program 1 times [2023-04-01 10:15:54,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:54,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784944651] [2023-04-01 10:15:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:54,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:55,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:55,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784944651] [2023-04-01 10:15:55,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784944651] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:55,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:55,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:15:55,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975483350] [2023-04-01 10:15:55,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:15:55,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:15:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:55,057 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:15:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:56,811 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:15:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:15:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:15:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:56,826 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:15:56,826 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:15:56,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:56,834 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:56,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:15:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:15:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:15:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:15:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 10:15:56,922 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 10:15:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:56,923 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 10:15:56,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:15:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 10:15:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:15:56,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:56,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:15:56,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:56,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1371117901, now seen corresponding path program 1 times [2023-04-01 10:15:56,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:56,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646220223] [2023-04-01 10:15:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:57,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:57,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646220223] [2023-04-01 10:15:57,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646220223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:57,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:57,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:15:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700115050] [2023-04-01 10:15:57,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:15:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:15:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:57,050 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:15:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:58,294 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-04-01 10:15:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:15:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 10:15:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:58,299 INFO L225 Difference]: With dead ends: 1395 [2023-04-01 10:15:58,299 INFO L226 Difference]: Without dead ends: 931 [2023-04-01 10:15:58,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:58,302 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:58,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 10:15:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-01 10:15:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-04-01 10:15:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 10:15:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-04-01 10:15:58,325 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-04-01 10:15:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:58,325 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-04-01 10:15:58,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:15:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-04-01 10:15:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 10:15:58,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:58,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:15:58,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:15:58,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:58,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1417767031, now seen corresponding path program 1 times [2023-04-01 10:15:58,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:58,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693104592] [2023-04-01 10:15:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:58,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 10:15:58,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:58,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693104592] [2023-04-01 10:15:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693104592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:58,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:58,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:15:58,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534091107] [2023-04-01 10:15:58,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:58,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:15:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:58,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:15:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:15:58,693 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:16:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:00,714 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-04-01 10:16:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:16:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-04-01 10:16:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:00,726 INFO L225 Difference]: With dead ends: 2350 [2023-04-01 10:16:00,726 INFO L226 Difference]: Without dead ends: 1426 [2023-04-01 10:16:00,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:16:00,735 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:00,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:16:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-04-01 10:16:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-04-01 10:16:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-04-01 10:16:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-04-01 10:16:00,785 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-04-01 10:16:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:00,787 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-04-01 10:16:00,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:16:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-04-01 10:16:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 10:16:00,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:00,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:16:00,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:00,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1536960949, now seen corresponding path program 1 times [2023-04-01 10:16:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:00,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62394659] [2023-04-01 10:16:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:16:01,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62394659] [2023-04-01 10:16:01,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62394659] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:16:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50952824] [2023-04-01 10:16:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:01,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:16:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:01,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:16:01,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:16:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:02,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 10:16:02,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:16:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:16:02,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:16:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50952824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:02,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:16:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 10:16:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486158161] [2023-04-01 10:16:02,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:16:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:16:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:16:02,779 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:16:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:05,848 INFO L93 Difference]: Finished difference Result 3553 states and 4519 transitions. [2023-04-01 10:16:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 10:16:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 173 [2023-04-01 10:16:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:05,863 INFO L225 Difference]: With dead ends: 3553 [2023-04-01 10:16:05,863 INFO L226 Difference]: Without dead ends: 2155 [2023-04-01 10:16:05,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-01 10:16:05,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 422 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:05,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 49 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 10:16:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2023-04-01 10:16:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 2131. [2023-04-01 10:16:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2074 states have (on average 1.212632594021215) internal successors, (2515), 2098 states have internal predecessors, (2515), 17 states have call successors, (17), 17 states have call predecessors, (17), 39 states have return successors, (79), 15 states have call predecessors, (79), 16 states have call successors, (79) [2023-04-01 10:16:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 2611 transitions. [2023-04-01 10:16:05,934 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 2611 transitions. Word has length 173 [2023-04-01 10:16:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:05,936 INFO L495 AbstractCegarLoop]: Abstraction has 2131 states and 2611 transitions. [2023-04-01 10:16:05,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:16:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 2611 transitions. [2023-04-01 10:16:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-04-01 10:16:05,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:05,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:05,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:16:06,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:16:06,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:06,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2147121698, now seen corresponding path program 1 times [2023-04-01 10:16:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:06,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119673794] [2023-04-01 10:16:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:06,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:16:06,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119673794] [2023-04-01 10:16:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119673794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:06,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:06,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513364364] [2023-04-01 10:16:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:06,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:06,695 INFO L87 Difference]: Start difference. First operand 2131 states and 2611 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-04-01 10:16:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:08,398 INFO L93 Difference]: Finished difference Result 4732 states and 6033 transitions. [2023-04-01 10:16:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 247 [2023-04-01 10:16:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:08,412 INFO L225 Difference]: With dead ends: 4732 [2023-04-01 10:16:08,412 INFO L226 Difference]: Without dead ends: 2830 [2023-04-01 10:16:08,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:08,416 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 269 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:08,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 312 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:16:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2023-04-01 10:16:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2819. [2023-04-01 10:16:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2753 states have (on average 1.2422811478387215) internal successors, (3420), 2780 states have internal predecessors, (3420), 20 states have call successors, (20), 20 states have call predecessors, (20), 45 states have return successors, (117), 18 states have call predecessors, (117), 19 states have call successors, (117) [2023-04-01 10:16:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3557 transitions. [2023-04-01 10:16:08,476 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3557 transitions. Word has length 247 [2023-04-01 10:16:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:08,477 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 3557 transitions. [2023-04-01 10:16:08,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-04-01 10:16:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3557 transitions. [2023-04-01 10:16:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-04-01 10:16:08,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:08,480 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:08,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:16:08,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:08,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2132859069, now seen corresponding path program 1 times [2023-04-01 10:16:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496496195] [2023-04-01 10:16:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 10:16:08,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496496195] [2023-04-01 10:16:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496496195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:08,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815226394] [2023-04-01 10:16:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:08,887 INFO L87 Difference]: Start difference. First operand 2819 states and 3557 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-04-01 10:16:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:10,124 INFO L93 Difference]: Finished difference Result 5885 states and 7675 transitions. [2023-04-01 10:16:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 262 [2023-04-01 10:16:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:10,139 INFO L225 Difference]: With dead ends: 5885 [2023-04-01 10:16:10,139 INFO L226 Difference]: Without dead ends: 3295 [2023-04-01 10:16:10,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:10,145 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 233 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:10,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 172 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 10:16:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2023-04-01 10:16:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 3060. [2023-04-01 10:16:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2988 states have (on average 1.2409638554216869) internal successors, (3708), 3017 states have internal predecessors, (3708), 22 states have call successors, (22), 22 states have call predecessors, (22), 49 states have return successors, (146), 20 states have call predecessors, (146), 21 states have call successors, (146) [2023-04-01 10:16:10,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 3876 transitions. [2023-04-01 10:16:10,208 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 3876 transitions. Word has length 262 [2023-04-01 10:16:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:10,209 INFO L495 AbstractCegarLoop]: Abstraction has 3060 states and 3876 transitions. [2023-04-01 10:16:10,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-04-01 10:16:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 3876 transitions. [2023-04-01 10:16:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-04-01 10:16:10,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:10,212 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:16:10,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:10,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash 853794135, now seen corresponding path program 1 times [2023-04-01 10:16:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:10,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732082031] [2023-04-01 10:16:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:10,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732082031] [2023-04-01 10:16:10,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732082031] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:16:10,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123711512] [2023-04-01 10:16:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:10,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:16:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:10,567 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) [2023-04-01 10:16:10,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:16:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:10,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:16:10,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:16:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:10,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:16:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123711512] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:16:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277582880] [2023-04-01 10:16:11,027 INFO L159 IcfgInterpreter]: Started Sifa with 222 locations of interest [2023-04-01 10:16:11,027 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:16:11,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:16:11,035 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:16:11,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:16:11,352 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:16:12,198 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2023-04-01 10:16:12,840 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8565 conjuctions. This might take some time... [2023-04-01 10:16:13,019 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 58 conjuctions. [2023-04-01 10:16:16,771 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 10:16:17,085 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 92344 conjuctions. This might take some time...