/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:44:51,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:44:51,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:44:51,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:44:51,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:44:51,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:44:51,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:44:51,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:44:51,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:44:51,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:44:51,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:44:51,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:44:51,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:44:51,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:44:51,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:44:51,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:44:51,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:44:51,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:44:51,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:44:51,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:44:51,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:44:51,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:44:51,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:44:51,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:44:51,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-30 22:44:51,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-30 22:44:51,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-30 22:44:51,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-30 22:44:51,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-30 22:44:51,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-30 22:44:51,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:44:51,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:44:51,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:44:51,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:44:51,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:44:51,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:44:51,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:44:51,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:44:51,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:44:51,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:44:51,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:44:51,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:44:51,264 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:44:51,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:44:51,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:44:51,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:44:51,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:44:51,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:44:51,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:44:51,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:44:51,266 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:44:51,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:44:51,267 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:44:51,268 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:44:51,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:44:51,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:44:51,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:44:51,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:44:51,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:51,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:44:51,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:44:51,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:44:51,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:44:51,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:44:51,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:44:51,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:44:51,270 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:44:51,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:44:51,271 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:44:51,271 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:44:51,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:44:51,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:44:51,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:44:51,540 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:44:51,541 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:44:51,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2023-03-30 22:44:52,666 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:44:53,003 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:44:53,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2023-03-30 22:44:53,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3bbc4af/88798fb9e5384e67b3550c01132cf345/FLAGaf4b33570 [2023-03-30 22:44:53,046 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3bbc4af/88798fb9e5384e67b3550c01132cf345 [2023-03-30 22:44:53,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:44:53,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:44:53,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:44:53,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:44:53,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:44:53,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:53,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5759bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53, skipping insertion in model container [2023-03-30 22:44:53,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:53,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:44:53,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:44:53,552 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/Problem03_label15.c[61228,61241] [2023-03-30 22:44:53,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:44:53,589 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:44:53,944 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/Problem03_label15.c[61228,61241] [2023-03-30 22:44:53,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:44:53,969 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:44:53,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53 WrapperNode [2023-03-30 22:44:53,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:44:53,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:44:53,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:44:53,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:44:53,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:53,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:44:54,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:44:54,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:44:54,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:44:54,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (1/1) ... [2023-03-30 22:44:54,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:54,139 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) [2023-03-30 22:44:54,156 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 [2023-03-30 22:44:54,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:44:54,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:44:54,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:44:54,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:44:54,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:44:54,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:44:54,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:44:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:44:54,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:44:54,301 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:44:54,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:44:55,846 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:44:55,854 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:44:55,855 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:44:55,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:55 BoogieIcfgContainer [2023-03-30 22:44:55,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:44:55,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:44:55,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:44:55,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:44:55,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:44:53" (1/3) ... [2023-03-30 22:44:55,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e21f335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:55, skipping insertion in model container [2023-03-30 22:44:55,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:53" (2/3) ... [2023-03-30 22:44:55,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e21f335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:55, skipping insertion in model container [2023-03-30 22:44:55,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:55" (3/3) ... [2023-03-30 22:44:55,867 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2023-03-30 22:44:55,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:44:55,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:44:55,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:44:55,949 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=PETRI_NET, 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;@736e82c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:44:55,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:44:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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) [2023-03-30 22:44:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-03-30 22:44:55,972 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:55,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:55,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:55,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1186973458, now seen corresponding path program 1 times [2023-03-30 22:44:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:55,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973144591] [2023-03-30 22:44:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:55,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:57,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:57,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:57,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973144591] [2023-03-30 22:44:57,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973144591] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:57,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:57,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:44:57,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311707720] [2023-03-30 22:44:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:44:57,381 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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 5 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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) [2023-03-30 22:45:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:00,073 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2023-03-30 22:45:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:45:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 206 [2023-03-30 22:45:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:00,093 INFO L225 Difference]: With dead ends: 1107 [2023-03-30 22:45:00,093 INFO L226 Difference]: Without dead ends: 699 [2023-03-30 22:45:00,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:00,104 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 944 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:00,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 70 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-30 22:45:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-03-30 22:45:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2023-03-30 22:45:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 464 states have (on average 1.5280172413793103) internal successors, (709), 466 states have internal predecessors, (709), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:45:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2023-03-30 22:45:00,208 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 206 [2023-03-30 22:45:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:00,212 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2023-03-30 22:45:00,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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) [2023-03-30 22:45:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2023-03-30 22:45:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-03-30 22:45:00,223 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:00,223 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:45:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:45:00,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:00,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1162372239, now seen corresponding path program 1 times [2023-03-30 22:45:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172093627] [2023-03-30 22:45:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172093627] [2023-03-30 22:45:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172093627] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:00,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:00,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:45:00,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096194986] [2023-03-30 22:45:00,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:00,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:45:00,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:45:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:00,891 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand has 7 states, 6 states have (on average 35.333333333333336) internal successors, (212), 4 states have internal predecessors, (212), 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) [2023-03-30 22:45:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:02,712 INFO L93 Difference]: Finished difference Result 1422 states and 2199 transitions. [2023-03-30 22:45:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:45:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 35.333333333333336) internal successors, (212), 4 states have internal predecessors, (212), 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 218 [2023-03-30 22:45:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:02,730 INFO L225 Difference]: With dead ends: 1422 [2023-03-30 22:45:02,730 INFO L226 Difference]: Without dead ends: 954 [2023-03-30 22:45:02,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:02,739 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1223 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:02,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 142 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:45:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-03-30 22:45:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 934. [2023-03-30 22:45:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 914 states have (on average 1.50109409190372) internal successors, (1372), 922 states have internal predecessors, (1372), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-30 22:45:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1407 transitions. [2023-03-30 22:45:02,802 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1407 transitions. Word has length 218 [2023-03-30 22:45:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:02,803 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1407 transitions. [2023-03-30 22:45:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 35.333333333333336) internal successors, (212), 4 states have internal predecessors, (212), 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) [2023-03-30 22:45:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1407 transitions. [2023-03-30 22:45:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-03-30 22:45:02,807 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:02,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:02,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:45:02,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:02,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2100623398, now seen corresponding path program 1 times [2023-03-30 22:45:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929297705] [2023-03-30 22:45:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:04,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:04,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:04,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929297705] [2023-03-30 22:45:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929297705] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133470138] [2023-03-30 22:45:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:04,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:04,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:04,997 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) [2023-03-30 22:45:04,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:45:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:05,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:05,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:05,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133470138] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:05,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:05,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-30 22:45:05,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897950063] [2023-03-30 22:45:05,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:05,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:45:05,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:45:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:05,559 INFO L87 Difference]: Start difference. First operand 934 states and 1407 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-03-30 22:45:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:06,373 INFO L93 Difference]: Finished difference Result 2717 states and 4175 transitions. [2023-03-30 22:45:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:45:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 227 [2023-03-30 22:45:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:06,382 INFO L225 Difference]: With dead ends: 2717 [2023-03-30 22:45:06,383 INFO L226 Difference]: Without dead ends: 1789 [2023-03-30 22:45:06,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:06,386 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 68 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:06,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 423 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:45:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2023-03-30 22:45:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1786. [2023-03-30 22:45:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1751 states have (on average 1.4026270702455739) internal successors, (2456), 1766 states have internal predecessors, (2456), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (99), 9 states have call predecessors, (99), 9 states have call successors, (99) [2023-03-30 22:45:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2565 transitions. [2023-03-30 22:45:06,466 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2565 transitions. Word has length 227 [2023-03-30 22:45:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:06,467 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2565 transitions. [2023-03-30 22:45:06,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-03-30 22:45:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2565 transitions. [2023-03-30 22:45:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-03-30 22:45:06,473 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:06,473 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] [2023-03-30 22:45:06,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:06,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:06,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:06,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1927910128, now seen corresponding path program 1 times [2023-03-30 22:45:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:06,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186610656] [2023-03-30 22:45:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:07,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:07,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186610656] [2023-03-30 22:45:07,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186610656] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:07,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30297109] [2023-03-30 22:45:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:07,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:07,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:07,240 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) [2023-03-30 22:45:07,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:45:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:45:07,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:07,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30297109] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:07,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-03-30 22:45:07,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703377239] [2023-03-30 22:45:07,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:07,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 22:45:07,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 22:45:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:45:07,659 INFO L87 Difference]: Start difference. First operand 1786 states and 2565 transitions. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 11 states have internal predecessors, (251), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:45:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:10,981 INFO L93 Difference]: Finished difference Result 7175 states and 11366 transitions. [2023-03-30 22:45:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:45:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 11 states have internal predecessors, (251), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 237 [2023-03-30 22:45:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:11,012 INFO L225 Difference]: With dead ends: 7175 [2023-03-30 22:45:11,013 INFO L226 Difference]: Without dead ends: 5395 [2023-03-30 22:45:11,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:45:11,021 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2038 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:11,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2038 Valid, 174 Invalid, 3347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-30 22:45:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2023-03-30 22:45:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5299. [2023-03-30 22:45:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5299 states, 5135 states have (on average 1.237390457643622) internal successors, (6354), 5247 states have internal predecessors, (6354), 26 states have call successors, (26), 26 states have call predecessors, (26), 137 states have return successors, (675), 25 states have call predecessors, (675), 25 states have call successors, (675) [2023-03-30 22:45:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5299 states to 5299 states and 7055 transitions. [2023-03-30 22:45:11,223 INFO L78 Accepts]: Start accepts. Automaton has 5299 states and 7055 transitions. Word has length 237 [2023-03-30 22:45:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:11,224 INFO L495 AbstractCegarLoop]: Abstraction has 5299 states and 7055 transitions. [2023-03-30 22:45:11,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 11 states have internal predecessors, (251), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:45:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5299 states and 7055 transitions. [2023-03-30 22:45:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-03-30 22:45:11,244 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:11,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:11,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:11,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:45:11,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:11,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1373233794, now seen corresponding path program 1 times [2023-03-30 22:45:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:11,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908352855] [2023-03-30 22:45:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:11,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:13,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908352855] [2023-03-30 22:45:13,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908352855] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814252601] [2023-03-30 22:45:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:13,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:13,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:13,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:45:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:13,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:45:13,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:45:13,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:45:14,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814252601] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:14,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:45:14,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 4] total 12 [2023-03-30 22:45:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319708458] [2023-03-30 22:45:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:14,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:45:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:14,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:45:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:14,376 INFO L87 Difference]: Start difference. First operand 5299 states and 7055 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:15,205 INFO L93 Difference]: Finished difference Result 15404 states and 21006 transitions. [2023-03-30 22:45:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:45:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 238 [2023-03-30 22:45:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:15,250 INFO L225 Difference]: With dead ends: 15404 [2023-03-30 22:45:15,251 INFO L226 Difference]: Without dead ends: 10111 [2023-03-30 22:45:15,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 472 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:15,268 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 346 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:15,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 133 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:45:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10111 states. [2023-03-30 22:45:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10111 to 10083. [2023-03-30 22:45:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10083 states, 9772 states have (on average 1.2073270568972574) internal successors, (11798), 9987 states have internal predecessors, (11798), 48 states have call successors, (48), 48 states have call predecessors, (48), 262 states have return successors, (1568), 47 states have call predecessors, (1568), 47 states have call successors, (1568) [2023-03-30 22:45:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10083 states to 10083 states and 13414 transitions. [2023-03-30 22:45:15,607 INFO L78 Accepts]: Start accepts. Automaton has 10083 states and 13414 transitions. Word has length 238 [2023-03-30 22:45:15,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:15,608 INFO L495 AbstractCegarLoop]: Abstraction has 10083 states and 13414 transitions. [2023-03-30 22:45:15,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 10083 states and 13414 transitions. [2023-03-30 22:45:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-03-30 22:45:15,639 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:15,639 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 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] [2023-03-30 22:45:15,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 22:45:15,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:15,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:15,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -390895363, now seen corresponding path program 1 times [2023-03-30 22:45:15,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:15,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900052382] [2023-03-30 22:45:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:15,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:16,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:16,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:45:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:45:16,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:16,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900052382] [2023-03-30 22:45:16,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900052382] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:16,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038448380] [2023-03-30 22:45:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:16,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:16,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:16,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:16,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:45:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:16,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:45:16,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:17,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038448380] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:17,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-03-30 22:45:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843174824] [2023-03-30 22:45:17,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:17,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-30 22:45:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-30 22:45:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-03-30 22:45:17,583 INFO L87 Difference]: Start difference. First operand 10083 states and 13414 transitions. Second operand has 17 states, 17 states have (on average 18.88235294117647) internal successors, (321), 15 states have internal predecessors, (321), 5 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-30 22:45:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:24,100 INFO L93 Difference]: Finished difference Result 39213 states and 57422 transitions. [2023-03-30 22:45:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-03-30 22:45:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 18.88235294117647) internal successors, (321), 15 states have internal predecessors, (321), 5 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 252 [2023-03-30 22:45:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:24,261 INFO L225 Difference]: With dead ends: 39213 [2023-03-30 22:45:24,262 INFO L226 Difference]: Without dead ends: 29136 [2023-03-30 22:45:24,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2023-03-30 22:45:24,311 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 3805 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 1479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 6032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1479 IncrementalHoareTripleChecker+Valid, 4553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:24,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 411 Invalid, 6032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1479 Valid, 4553 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-30 22:45:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29136 states. [2023-03-30 22:45:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29136 to 28555. [2023-03-30 22:45:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28555 states, 27597 states have (on average 1.1809254629126353) internal successors, (32590), 28291 states have internal predecessors, (32590), 132 states have call successors, (132), 132 states have call predecessors, (132), 825 states have return successors, (4324), 131 states have call predecessors, (4324), 131 states have call successors, (4324) [2023-03-30 22:45:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28555 states to 28555 states and 37046 transitions. [2023-03-30 22:45:25,389 INFO L78 Accepts]: Start accepts. Automaton has 28555 states and 37046 transitions. Word has length 252 [2023-03-30 22:45:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:25,390 INFO L495 AbstractCegarLoop]: Abstraction has 28555 states and 37046 transitions. [2023-03-30 22:45:25,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.88235294117647) internal successors, (321), 15 states have internal predecessors, (321), 5 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-30 22:45:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 28555 states and 37046 transitions. [2023-03-30 22:45:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-03-30 22:45:25,459 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:25,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:25,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:25,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:25,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:25,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1759898222, now seen corresponding path program 1 times [2023-03-30 22:45:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423209774] [2023-03-30 22:45:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:26,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:26,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:26,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:26,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423209774] [2023-03-30 22:45:26,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423209774] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:26,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530260746] [2023-03-30 22:45:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:26,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:26,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:26,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:45:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:26,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:26,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:27,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530260746] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:27,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:27,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-03-30 22:45:27,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984733618] [2023-03-30 22:45:27,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:27,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:45:27,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:45:27,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:45:27,185 INFO L87 Difference]: Start difference. First operand 28555 states and 37046 transitions. Second operand has 14 states, 14 states have (on average 23.857142857142858) internal successors, (334), 12 states have internal predecessors, (334), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:45:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:40,673 INFO L93 Difference]: Finished difference Result 116451 states and 203330 transitions. [2023-03-30 22:45:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-03-30 22:45:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.857142857142858) internal successors, (334), 12 states have internal predecessors, (334), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 261 [2023-03-30 22:45:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:41,332 INFO L225 Difference]: With dead ends: 116451 [2023-03-30 22:45:41,332 INFO L226 Difference]: Without dead ends: 87902 [2023-03-30 22:45:41,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8239 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2229, Invalid=17511, Unknown=0, NotChecked=0, Total=19740 [2023-03-30 22:45:41,670 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 7239 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 7238 mSolverCounterSat, 2071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7264 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 9309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2071 IncrementalHoareTripleChecker+Valid, 7238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:41,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7264 Valid, 494 Invalid, 9309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2071 Valid, 7238 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-03-30 22:45:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87902 states.