/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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:44:58,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:44:58,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:44:58,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:44:58,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:44:58,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:44:58,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:44:58,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:44:58,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:44:58,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:44:58,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:44:58,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:44:58,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:44:58,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:44:58,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:44:58,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:44:58,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:44:58,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:44:58,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:44:58,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:44:58,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:44:58,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:44:58,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:44:58,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:44:58,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-30 22:44:58,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-30 22:44:58,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-30 22:44:58,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-30 22:44:58,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-30 22:44:58,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-30 22:44:58,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:44:58,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:44:58,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:44:58,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:44:58,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:44:58,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:44:58,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:44:58,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:44:58,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:44:58,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:44:58,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:44:58,427 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 22:44:58,456 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:44:58,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:44:58,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:44:58,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:44:58,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:44:58,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:44:58,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:44:58,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:44:58,459 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:44:58,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:44:58,460 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:44:58,461 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:44:58,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:44:58,462 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:44:58,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:44:58,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:44:58,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:44:58,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:44:58,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:58,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:44:58,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:44:58,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:44:58,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:44:58,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:44:58,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:44:58,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:44:58,464 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:44:58,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:44:58,465 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:44:58,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:44:58,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:44:58,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:44:58,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:44:58,722 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:44:58,722 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:44:58,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2023-03-30 22:44:59,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:45:00,228 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:45:00,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2023-03-30 22:45:00,248 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff05e212/59cba6bdb9d544dd8afbb8ff62ec58e3/FLAGd945d82cb [2023-03-30 22:45:00,267 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff05e212/59cba6bdb9d544dd8afbb8ff62ec58e3 [2023-03-30 22:45:00,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:45:00,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:45:00,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:45:00,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:45:00,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:45:00,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:45:00" (1/1) ... [2023-03-30 22:45:00,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a528f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:00, skipping insertion in model container [2023-03-30 22:45:00,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:45:00" (1/1) ... [2023-03-30 22:45:00,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:45:00,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:45:00,847 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_label18.c[61636,61649] [2023-03-30 22:45:00,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:45:00,899 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:45:01,101 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_label18.c[61636,61649] [2023-03-30 22:45:01,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:45:01,124 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:45:01,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01 WrapperNode [2023-03-30 22:45:01,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:45:01,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:45:01,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:45:01,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:45:01,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:45:01,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:45:01,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:45:01,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:45:01,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (1/1) ... [2023-03-30 22:45:01,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:45:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:01,291 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 22:45:01,311 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 22:45:01,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:45:01,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:45:01,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:45:01,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:45:01,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:45:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:45:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:45:01,437 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:45:01,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:45:02,925 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:45:02,940 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:45:02,940 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:45:02,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:45:02 BoogieIcfgContainer [2023-03-30 22:45:02,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:45:02,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:45:02,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:45:02,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:45:02,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:45:00" (1/3) ... [2023-03-30 22:45:02,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da8a316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:45:02, skipping insertion in model container [2023-03-30 22:45:02,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:01" (2/3) ... [2023-03-30 22:45:02,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da8a316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:45:02, skipping insertion in model container [2023-03-30 22:45:02,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:45:02" (3/3) ... [2023-03-30 22:45:02,952 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label18.c [2023-03-30 22:45:02,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:45:02,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:45:03,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:45:03,029 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;@7fa55abc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:45:03,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:45:03,035 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 22:45:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-03-30 22:45:03,052 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:03,053 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, 1, 1, 1] [2023-03-30 22:45:03,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:03,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash 665682321, now seen corresponding path program 1 times [2023-03-30 22:45:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765561414] [2023-03-30 22:45:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:04,641 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 22:45:04,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:04,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765561414] [2023-03-30 22:45:04,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765561414] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:04,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:04,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:45:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342460244] [2023-03-30 22:45:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:45:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:04,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:45:04,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:45:04,695 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 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 22:45:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:06,679 INFO L93 Difference]: Finished difference Result 867 states and 1525 transitions. [2023-03-30 22:45:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:45:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 209 [2023-03-30 22:45:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:06,694 INFO L225 Difference]: With dead ends: 867 [2023-03-30 22:45:06,695 INFO L226 Difference]: Without dead ends: 478 [2023-03-30 22:45:06,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:45:06,704 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 600 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:06,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 51 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 22:45:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-03-30 22:45:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 463. [2023-03-30 22:45:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 453 states have (on average 1.5827814569536425) internal successors, (717), 455 states have internal predecessors, (717), 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 22:45:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 728 transitions. [2023-03-30 22:45:06,773 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 728 transitions. Word has length 209 [2023-03-30 22:45:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:06,774 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 728 transitions. [2023-03-30 22:45:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 22:45:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 728 transitions. [2023-03-30 22:45:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-03-30 22:45:06,780 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:06,780 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-03-30 22:45:06,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:45:06,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:06,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1669691502, now seen corresponding path program 1 times [2023-03-30 22:45:06,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:06,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74642939] [2023-03-30 22:45:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:06,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:07,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:07,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74642939] [2023-03-30 22:45:07,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74642939] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:07,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:07,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 22:45:07,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924823823] [2023-03-30 22:45:07,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:07,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:45:07,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:45:07,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:45:07,757 INFO L87 Difference]: Start difference. First operand 463 states and 728 transitions. Second operand has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 22:45:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:10,339 INFO L93 Difference]: Finished difference Result 1812 states and 2914 transitions. [2023-03-30 22:45:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:45:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 219 [2023-03-30 22:45:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:10,349 INFO L225 Difference]: With dead ends: 1812 [2023-03-30 22:45:10,350 INFO L226 Difference]: Without dead ends: 1355 [2023-03-30 22:45:10,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:45:10,358 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1304 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:10,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 153 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-30 22:45:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2023-03-30 22:45:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1335. [2023-03-30 22:45:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1307 states have (on average 1.4506503442999235) internal successors, (1896), 1319 states have internal predecessors, (1896), 8 states have call successors, (8), 8 states have call predecessors, (8), 19 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) [2023-03-30 22:45:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1955 transitions. [2023-03-30 22:45:10,442 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1955 transitions. Word has length 219 [2023-03-30 22:45:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:10,447 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1955 transitions. [2023-03-30 22:45:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 22:45:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1955 transitions. [2023-03-30 22:45:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-03-30 22:45:10,455 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:10,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:45:10,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:45:10,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:10,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:10,457 INFO L85 PathProgramCache]: Analyzing trace with hash -718014865, now seen corresponding path program 1 times [2023-03-30 22:45:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:10,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584866844] [2023-03-30 22:45:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:11,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:45:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:45:11,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584866844] [2023-03-30 22:45:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584866844] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730369340] [2023-03-30 22:45:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:11,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:11,137 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 22:45:11,144 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 22:45:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:11,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:45:11,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:11,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730369340] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:11,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:11,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-03-30 22:45:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629749802] [2023-03-30 22:45:11,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:11,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 22:45:11,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:11,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 22:45:11,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:45:11,708 INFO L87 Difference]: Start difference. First operand 1335 states and 1955 transitions. Second operand has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 11 states have internal predecessors, (248), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-30 22:45:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:18,287 INFO L93 Difference]: Finished difference Result 9484 states and 16765 transitions. [2023-03-30 22:45:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-03-30 22:45:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 11 states have internal predecessors, (248), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 231 [2023-03-30 22:45:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:18,351 INFO L225 Difference]: With dead ends: 9484 [2023-03-30 22:45:18,352 INFO L226 Difference]: Without dead ends: 8155 [2023-03-30 22:45:18,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2023-03-30 22:45:18,365 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 3455 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 5217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:18,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 317 Invalid, 5217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-30 22:45:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2023-03-30 22:45:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 7915. [2023-03-30 22:45:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7915 states, 7662 states have (on average 1.2413208039676324) internal successors, (9511), 7839 states have internal predecessors, (9511), 38 states have call successors, (38), 38 states have call predecessors, (38), 214 states have return successors, (1264), 37 states have call predecessors, (1264), 37 states have call successors, (1264) [2023-03-30 22:45:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7915 states to 7915 states and 10813 transitions. [2023-03-30 22:45:18,763 INFO L78 Accepts]: Start accepts. Automaton has 7915 states and 10813 transitions. Word has length 231 [2023-03-30 22:45:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:18,764 INFO L495 AbstractCegarLoop]: Abstraction has 7915 states and 10813 transitions. [2023-03-30 22:45:18,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 11 states have internal predecessors, (248), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-30 22:45:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7915 states and 10813 transitions. [2023-03-30 22:45:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-03-30 22:45:18,788 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:18,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 22:45:18,800 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 22:45:18,999 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 22:45:19,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:19,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2135616052, now seen corresponding path program 1 times [2023-03-30 22:45:19,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:19,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858348459] [2023-03-30 22:45:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:19,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:19,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:20,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858348459] [2023-03-30 22:45:20,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858348459] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:20,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:20,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:45:20,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868736705] [2023-03-30 22:45:20,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:20,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:45:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:45:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:20,195 INFO L87 Difference]: Start difference. First operand 7915 states and 10813 transitions. Second operand has 7 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 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 22:45:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:22,257 INFO L93 Difference]: Finished difference Result 19822 states and 27851 transitions. [2023-03-30 22:45:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:45:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 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 254 [2023-03-30 22:45:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:22,315 INFO L225 Difference]: With dead ends: 19822 [2023-03-30 22:45:22,316 INFO L226 Difference]: Without dead ends: 11913 [2023-03-30 22:45:22,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:22,341 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1546 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:22,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 112 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:45:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11913 states. [2023-03-30 22:45:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11913 to 11810. [2023-03-30 22:45:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11810 states, 11441 states have (on average 1.2164146490691372) internal successors, (13917), 11698 states have internal predecessors, (13917), 56 states have call successors, (56), 56 states have call predecessors, (56), 312 states have return successors, (1810), 55 states have call predecessors, (1810), 55 states have call successors, (1810) [2023-03-30 22:45:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11810 states to 11810 states and 15783 transitions. [2023-03-30 22:45:22,707 INFO L78 Accepts]: Start accepts. Automaton has 11810 states and 15783 transitions. Word has length 254 [2023-03-30 22:45:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:22,708 INFO L495 AbstractCegarLoop]: Abstraction has 11810 states and 15783 transitions. [2023-03-30 22:45:22,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 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 22:45:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 11810 states and 15783 transitions. [2023-03-30 22:45:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-03-30 22:45:22,736 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:22,736 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-30 22:45:22,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 22:45:22,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:22,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2115060092, now seen corresponding path program 1 times [2023-03-30 22:45:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:22,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355577892] [2023-03-30 22:45:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:23,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:23,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:23,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:45:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:23,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:23,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355577892] [2023-03-30 22:45:23,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355577892] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:23,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153852771] [2023-03-30 22:45:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:23,981 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 22:45:24,011 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 22:45:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:24,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:45:24,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:45:24,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153852771] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:24,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:24,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-30 22:45:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428904752] [2023-03-30 22:45:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:24,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:45:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:45:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:45:24,501 INFO L87 Difference]: Start difference. First operand 11810 states and 15783 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:45:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:25,323 INFO L93 Difference]: Finished difference Result 23616 states and 31564 transitions. [2023-03-30 22:45:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:45:25,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 265 [2023-03-30 22:45:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:25,377 INFO L225 Difference]: With dead ends: 23616 [2023-03-30 22:45:25,377 INFO L226 Difference]: Without dead ends: 11812 [2023-03-30 22:45:25,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:45:25,446 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 78 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:25,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 110 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:45:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11812 states. [2023-03-30 22:45:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11812 to 11808. [2023-03-30 22:45:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11440 states have (on average 1.2048951048951049) internal successors, (13784), 11696 states have internal predecessors, (13784), 56 states have call successors, (56), 56 states have call predecessors, (56), 311 states have return successors, (1614), 55 states have call predecessors, (1614), 55 states have call successors, (1614) [2023-03-30 22:45:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 15454 transitions. [2023-03-30 22:45:25,847 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 15454 transitions. Word has length 265 [2023-03-30 22:45:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:25,848 INFO L495 AbstractCegarLoop]: Abstraction has 11808 states and 15454 transitions. [2023-03-30 22:45:25,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:45:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 15454 transitions. [2023-03-30 22:45:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-03-30 22:45:25,877 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:25,877 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:45:25,886 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 22:45:26,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:26,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:26,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1241312895, now seen corresponding path program 1 times [2023-03-30 22:45:26,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:26,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079418271] [2023-03-30 22:45:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:45:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:45:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-30 22:45:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:45:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:27,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079418271] [2023-03-30 22:45:27,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079418271] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:27,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712172873] [2023-03-30 22:45:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:27,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:27,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:27,665 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 22:45:27,668 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 22:45:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:27,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:45:27,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 85 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 22:45:28,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 22:45:28,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712172873] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:28,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:45:28,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2023-03-30 22:45:28,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42655600] [2023-03-30 22:45:28,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:28,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:45:28,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:45:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:45:28,524 INFO L87 Difference]: Start difference. First operand 11808 states and 15454 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 4 states have internal predecessors, (242), 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) [2023-03-30 22:45:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:29,697 INFO L93 Difference]: Finished difference Result 34160 states and 45267 transitions. [2023-03-30 22:45:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:45:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 4 states have internal predecessors, (242), 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 303 [2023-03-30 22:45:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:29,776 INFO L225 Difference]: With dead ends: 34160 [2023-03-30 22:45:29,776 INFO L226 Difference]: Without dead ends: 22358 [2023-03-30 22:45:29,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 601 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:45:29,807 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 517 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:29,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 168 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:45:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22358 states. [2023-03-30 22:45:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22358 to 22320. [2023-03-30 22:45:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22320 states, 21682 states have (on average 1.1797343418503827) internal successors, (25579), 22110 states have internal predecessors, (25579), 105 states have call successors, (105), 105 states have call predecessors, (105), 532 states have return successors, (3159), 104 states have call predecessors, (3159), 104 states have call successors, (3159) [2023-03-30 22:45:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22320 states to 22320 states and 28843 transitions. [2023-03-30 22:45:30,576 INFO L78 Accepts]: Start accepts. Automaton has 22320 states and 28843 transitions. Word has length 303 [2023-03-30 22:45:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:30,576 INFO L495 AbstractCegarLoop]: Abstraction has 22320 states and 28843 transitions. [2023-03-30 22:45:30,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 4 states have internal predecessors, (242), 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) [2023-03-30 22:45:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22320 states and 28843 transitions. [2023-03-30 22:45:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-03-30 22:45:30,630 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:30,630 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 22:45:30,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:30,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:30,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:30,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -253193735, now seen corresponding path program 1 times [2023-03-30 22:45:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357378361] [2023-03-30 22:45:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:45:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:32,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-30 22:45:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:32,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-03-30 22:45:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 98 proven. 58 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-30 22:45:32,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:32,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357378361] [2023-03-30 22:45:32,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357378361] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:32,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830937197] [2023-03-30 22:45:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:32,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:32,117 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 22:45:32,143 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 22:45:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:32,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:32,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:45:32,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-03-30 22:45:32,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830937197] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:32,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:32,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2023-03-30 22:45:32,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399182618] [2023-03-30 22:45:32,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:32,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:45:32,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:45:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:45:32,565 INFO L87 Difference]: Start difference. First operand 22320 states and 28843 transitions. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 12 states have internal predecessors, (316), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 22:45:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:41,589 INFO L93 Difference]: Finished difference Result 92336 states and 136381 transitions. [2023-03-30 22:45:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 22:45:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 12 states have internal predecessors, (316), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 306 [2023-03-30 22:45:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:41,976 INFO L225 Difference]: With dead ends: 92336 [2023-03-30 22:45:41,976 INFO L226 Difference]: Without dead ends: 70022 [2023-03-30 22:45:42,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=590, Invalid=1960, Unknown=0, NotChecked=0, Total=2550 [2023-03-30 22:45:42,058 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4120 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 8240 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 8899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 8240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:42,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4120 Valid, 273 Invalid, 8899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 8240 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 22:45:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70022 states. [2023-03-30 22:45:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70022 to 67591. [2023-03-30 22:45:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67591 states, 65907 states have (on average 1.155112507017464) internal successors, (76130), 66717 states have internal predecessors, (76130), 559 states have call successors, (559), 315 states have call predecessors, (559), 1124 states have return successors, (15845), 558 states have call predecessors, (15845), 558 states have call successors, (15845) [2023-03-30 22:45:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67591 states to 67591 states and 92534 transitions. [2023-03-30 22:45:45,208 INFO L78 Accepts]: Start accepts. Automaton has 67591 states and 92534 transitions. Word has length 306 [2023-03-30 22:45:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:45,209 INFO L495 AbstractCegarLoop]: Abstraction has 67591 states and 92534 transitions. [2023-03-30 22:45:45,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 12 states have internal predecessors, (316), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 22:45:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 67591 states and 92534 transitions. [2023-03-30 22:45:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-03-30 22:45:45,393 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:45,393 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, 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, 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] [2023-03-30 22:45:45,404 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 22:45:45,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:45,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:45,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1083393456, now seen corresponding path program 1 times [2023-03-30 22:45:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900984833] [2023-03-30 22:45:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:46,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:46,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900984833] [2023-03-30 22:45:46,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900984833] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248008567] [2023-03-30 22:45:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:46,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:46,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:46,341 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 22:45:46,344 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 22:45:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:46,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:46,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:46,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248008567] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:47,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:47,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:45:47,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623498682] [2023-03-30 22:45:47,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:47,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:45:47,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:47,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:45:47,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:47,013 INFO L87 Difference]: Start difference. First operand 67591 states and 92534 transitions. Second operand has 12 states, 12 states have (on average 37.75) internal successors, (453), 10 states have internal predecessors, (453), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)