/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/Problem19_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:51:01,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:51:01,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:51:01,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:51:01,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:51:01,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:51:01,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:51:01,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:51:01,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:51:01,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:51:01,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:51:01,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:51:01,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:51:01,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:51:01,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:51:01,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:51:01,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:51:01,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:51:01,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:51:01,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:51:01,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:51:01,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:51:01,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:51:01,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:51:01,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:51:01,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:51:01,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:51:01,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:51:01,185 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 23:51:01,217 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:51:01,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:51:01,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:51:01,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:51:01,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:51:01,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:51:01,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:51:01,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:51:01,220 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:51:01,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:51:01,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:51:01,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:51:01,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:51:01,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:51:01,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:51:01,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:51:01,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:51:01,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:51:01,223 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:51:01,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:51:01,224 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:51:01,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:51:01,224 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:51:01,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:51:01,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:51:01,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:51:01,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:51:01,480 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:51:01,481 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:51:01,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2023-03-30 23:51:02,661 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:51:03,228 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:51:03,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2023-03-30 23:51:03,276 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b96b3bf/8b3a49d509c54d0aae6764367afe040f/FLAG7581db4fc [2023-03-30 23:51:03,291 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b96b3bf/8b3a49d509c54d0aae6764367afe040f [2023-03-30 23:51:03,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:51:03,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:51:03,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:51:03,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:51:03,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:51:03,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:51:03" (1/1) ... [2023-03-30 23:51:03,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd407c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:03, skipping insertion in model container [2023-03-30 23:51:03,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:51:03" (1/1) ... [2023-03-30 23:51:03,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:51:03,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:51:03,731 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/Problem19_label51.c[2619,2632] [2023-03-30 23:51:04,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:51:04,920 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:51:04,949 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/Problem19_label51.c[2619,2632] [2023-03-30 23:51:05,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:51:05,636 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:51:05,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05 WrapperNode [2023-03-30 23:51:05,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:51:05,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:51:05,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:51:05,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:51:05,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:05,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:05,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:05,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:05,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:05,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:06,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:06,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:06,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:51:06,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:51:06,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:51:06,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:51:06,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (1/1) ... [2023-03-30 23:51:06,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:51:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:51:06,206 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 23:51:06,227 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 23:51:06,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:51:06,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:51:06,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:51:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:51:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:51:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:51:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:51:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:51:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:51:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:51:06,317 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:51:06,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:51:13,497 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:51:13,514 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:51:13,515 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:51:13,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:51:13 BoogieIcfgContainer [2023-03-30 23:51:13,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:51:13,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:51:13,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:51:13,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:51:13,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:51:03" (1/3) ... [2023-03-30 23:51:13,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac0a510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:51:13, skipping insertion in model container [2023-03-30 23:51:13,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:51:05" (2/3) ... [2023-03-30 23:51:13,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac0a510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:51:13, skipping insertion in model container [2023-03-30 23:51:13,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:51:13" (3/3) ... [2023-03-30 23:51:13,526 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2023-03-30 23:51:13,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:51:13,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:51:13,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:51:13,636 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;@384f5611, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:51:13,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:51:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:51:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-30 23:51:13,653 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:13,653 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] [2023-03-30 23:51:13,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:13,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1220592112, now seen corresponding path program 1 times [2023-03-30 23:51:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548655050] [2023-03-30 23:51:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:14,112 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 23:51:14,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548655050] [2023-03-30 23:51:14,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548655050] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:14,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:14,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:51:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939692357] [2023-03-30 23:51:14,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:51:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:51:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:51:14,149 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 23:51:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:28,297 INFO L93 Difference]: Finished difference Result 6572 states and 12487 transitions. [2023-03-30 23:51:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:51:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 23 [2023-03-30 23:51:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:28,344 INFO L225 Difference]: With dead ends: 6572 [2023-03-30 23:51:28,344 INFO L226 Difference]: Without dead ends: 4727 [2023-03-30 23:51:28,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:28,363 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 7983 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 8395 mSolverCounterSat, 3886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7983 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 12281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3886 IncrementalHoareTripleChecker+Valid, 8395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:28,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7983 Valid, 464 Invalid, 12281 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3886 Valid, 8395 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2023-03-30 23:51:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2023-03-30 23:51:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4629. [2023-03-30 23:51:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4574 states have (on average 1.7586357673808484) internal successors, (8044), 4577 states have internal predecessors, (8044), 20 states have call successors, (20), 20 states have call predecessors, (20), 34 states have return successors, (74), 31 states have call predecessors, (74), 19 states have call successors, (74) [2023-03-30 23:51:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 8138 transitions. [2023-03-30 23:51:28,597 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 8138 transitions. Word has length 23 [2023-03-30 23:51:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:28,598 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 8138 transitions. [2023-03-30 23:51:28,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 23:51:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 8138 transitions. [2023-03-30 23:51:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-30 23:51:28,604 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:28,604 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:51:28,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:51:28,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:28,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 133981692, now seen corresponding path program 1 times [2023-03-30 23:51:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:28,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949747109] [2023-03-30 23:51:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:28,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:29,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:29,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949747109] [2023-03-30 23:51:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949747109] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:29,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:29,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:51:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819669839] [2023-03-30 23:51:29,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:29,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:51:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:51:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:29,422 INFO L87 Difference]: Start difference. First operand 4629 states and 8138 transitions. Second operand has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 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 23:51:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:41,984 INFO L93 Difference]: Finished difference Result 13980 states and 24832 transitions. [2023-03-30 23:51:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:51:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 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 122 [2023-03-30 23:51:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:42,033 INFO L225 Difference]: With dead ends: 13980 [2023-03-30 23:51:42,033 INFO L226 Difference]: Without dead ends: 9357 [2023-03-30 23:51:42,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:42,048 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 8894 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 10661 mSolverCounterSat, 2472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8894 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 13133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2472 IncrementalHoareTripleChecker+Valid, 10661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:42,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8894 Valid, 1151 Invalid, 13133 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2472 Valid, 10661 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2023-03-30 23:51:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-03-30 23:51:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 9175. [2023-03-30 23:51:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 9022 states have (on average 1.4976723564619818) internal successors, (13512), 9037 states have internal predecessors, (13512), 38 states have call successors, (38), 38 states have call predecessors, (38), 114 states have return successors, (354), 99 states have call predecessors, (354), 37 states have call successors, (354) [2023-03-30 23:51:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 13904 transitions. [2023-03-30 23:51:42,310 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 13904 transitions. Word has length 122 [2023-03-30 23:51:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:42,312 INFO L495 AbstractCegarLoop]: Abstraction has 9175 states and 13904 transitions. [2023-03-30 23:51:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 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 23:51:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 13904 transitions. [2023-03-30 23:51:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-03-30 23:51:42,320 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:42,320 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:51:42,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:51:42,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:42,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1633702768, now seen corresponding path program 1 times [2023-03-30 23:51:42,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:42,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330967364] [2023-03-30 23:51:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:42,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330967364] [2023-03-30 23:51:42,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330967364] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:42,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:42,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:51:42,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164617714] [2023-03-30 23:51:42,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:42,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:51:42,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:42,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:51:42,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:42,770 INFO L87 Difference]: Start difference. First operand 9175 states and 13904 transitions. Second operand has 7 states, 6 states have (on average 21.0) internal successors, (126), 4 states have internal predecessors, (126), 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 23:51:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:53,453 INFO L93 Difference]: Finished difference Result 27626 states and 42664 transitions. [2023-03-30 23:51:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:51:53,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.0) internal successors, (126), 4 states have internal predecessors, (126), 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 132 [2023-03-30 23:51:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:53,525 INFO L225 Difference]: With dead ends: 27626 [2023-03-30 23:51:53,526 INFO L226 Difference]: Without dead ends: 18457 [2023-03-30 23:51:53,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:53,555 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 14074 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 9862 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14074 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 10692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 9862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:53,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14074 Valid, 777 Invalid, 10692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 9862 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-03-30 23:51:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18457 states. [2023-03-30 23:51:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18457 to 18154. [2023-03-30 23:51:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18154 states, 17758 states have (on average 1.423471111611668) internal successors, (25278), 17807 states have internal predecessors, (25278), 74 states have call successors, (74), 74 states have call predecessors, (74), 321 states have return successors, (1124), 272 states have call predecessors, (1124), 73 states have call successors, (1124) [2023-03-30 23:51:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18154 states to 18154 states and 26476 transitions. [2023-03-30 23:51:53,964 INFO L78 Accepts]: Start accepts. Automaton has 18154 states and 26476 transitions. Word has length 132 [2023-03-30 23:51:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:53,966 INFO L495 AbstractCegarLoop]: Abstraction has 18154 states and 26476 transitions. [2023-03-30 23:51:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.0) internal successors, (126), 4 states have internal predecessors, (126), 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 23:51:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 18154 states and 26476 transitions. [2023-03-30 23:51:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-03-30 23:51:53,973 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:53,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:51:53,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:53,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 629616615, now seen corresponding path program 1 times [2023-03-30 23:51:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949948106] [2023-03-30 23:51:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:54,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949948106] [2023-03-30 23:51:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949948106] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:51:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510638099] [2023-03-30 23:51:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:51:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:51:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:51:54,556 INFO L87 Difference]: Start difference. First operand 18154 states and 26476 transitions. Second operand has 8 states, 7 states have (on average 33.285714285714285) internal successors, (233), 5 states have internal predecessors, (233), 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)