/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:26:39,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:26:39,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:26:39,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:26:39,803 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 [2023-04-01 20:26:39,831 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:26:39,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:26:39,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:26:39,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:26:39,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:26:39,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:26:39,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:26:39,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:26:39,834 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:26:39,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:26:39,835 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:26:39,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:26:39,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:26:39,836 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:26:39,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:26:39,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:26:39,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:26:39,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:26:39,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:26:39,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:26:39,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:26:39,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:26:39,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:26:39,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:26:39,838 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:26:39,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:26:39,839 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:26:39,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:26:39,839 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:26:39,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:26:40,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:26:40,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:26:40,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:26:40,062 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:26:40,062 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:26:40,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label24.c [2023-04-01 20:26:41,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:26:41,438 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:26:41,439 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label24.c [2023-04-01 20:26:41,453 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/450259a0e/075bea2bc24d443eaaddd89aaf8816b5/FLAGbcc8897fa [2023-04-01 20:26:41,467 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/450259a0e/075bea2bc24d443eaaddd89aaf8816b5 [2023-04-01 20:26:41,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:26:41,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:26:41,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:26:41,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:26:41,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:26:41,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:26:41" (1/1) ... [2023-04-01 20:26:41,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b318455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:41, skipping insertion in model container [2023-04-01 20:26:41,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:26:41" (1/1) ... [2023-04-01 20:26:41,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:26:41,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:26:42,034 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_label24.c[60015,60028] [2023-04-01 20:26:42,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:26:42,072 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:26:42,373 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_label24.c[60015,60028] [2023-04-01 20:26:42,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:26:42,403 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:26:42,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42 WrapperNode [2023-04-01 20:26:42,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:26:42,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:26:42,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:26:42,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:26:42,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,529 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:26:42,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:26:42,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:26:42,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:26:42,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (1/1) ... [2023-04-01 20:26:42,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:26:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:42,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:26:42,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:26:42,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:26:42,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:26:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:26:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:26:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:26:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:26:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:26:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:26:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:26:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:26:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:26:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:26:42,745 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:26:42,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:26:44,263 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:26:44,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:26:44,277 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:26:44,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:26:44 BoogieIcfgContainer [2023-04-01 20:26:44,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:26:44,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:26:44,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:26:44,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:26:44,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:26:41" (1/3) ... [2023-04-01 20:26:44,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76143c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:26:44, skipping insertion in model container [2023-04-01 20:26:44,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:42" (2/3) ... [2023-04-01 20:26:44,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76143c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:26:44, skipping insertion in model container [2023-04-01 20:26:44,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:26:44" (3/3) ... [2023-04-01 20:26:44,288 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label24.c [2023-04-01 20:26:44,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:26:44,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:26:44,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:26:44,362 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;@2403adeb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:26:44,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:26:44,367 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) [2023-04-01 20:26:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-04-01 20:26:44,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:44,382 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] [2023-04-01 20:26:44,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:44,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 62061729, now seen corresponding path program 1 times [2023-04-01 20:26:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:44,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673190260] [2023-04-01 20:26:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673190260] [2023-04-01 20:26:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673190260] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:45,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:26:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748226553] [2023-04-01 20:26:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:26:45,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:26:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:26:45,748 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 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:26:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:47,692 INFO L93 Difference]: Finished difference Result 889 states and 1547 transitions. [2023-04-01 20:26:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:26:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 197 [2023-04-01 20:26:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:47,706 INFO L225 Difference]: With dead ends: 889 [2023-04-01 20:26:47,706 INFO L226 Difference]: Without dead ends: 485 [2023-04-01 20:26:47,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:26:47,714 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 648 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:47,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 51 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:26:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-04-01 20:26:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2023-04-01 20:26:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 465 states have (on average 1.5483870967741935) internal successors, (720), 467 states have internal predecessors, (720), 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) [2023-04-01 20:26:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 731 transitions. [2023-04-01 20:26:47,783 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 731 transitions. Word has length 197 [2023-04-01 20:26:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:47,784 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 731 transitions. [2023-04-01 20:26:47,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:26:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 731 transitions. [2023-04-01 20:26:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-01 20:26:47,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:47,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:26:47,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:47,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash 971764066, now seen corresponding path program 1 times [2023-04-01 20:26:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723143350] [2023-04-01 20:26:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:48,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:48,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723143350] [2023-04-01 20:26:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723143350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:48,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:26:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537515960] [2023-04-01 20:26:48,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:26:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:26:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:48,462 INFO L87 Difference]: Start difference. First operand 475 states and 731 transitions. Second operand has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 4 states have internal predecessors, (203), 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) [2023-04-01 20:26:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:50,317 INFO L93 Difference]: Finished difference Result 1426 states and 2228 transitions. [2023-04-01 20:26:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:26:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 4 states have internal predecessors, (203), 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 209 [2023-04-01 20:26:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:50,324 INFO L225 Difference]: With dead ends: 1426 [2023-04-01 20:26:50,324 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 20:26:50,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:50,326 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1651 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:50,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 125 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:26:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 20:26:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2023-04-01 20:26:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 915 states have (on average 1.5224043715846995) internal successors, (1393), 924 states have internal predecessors, (1393), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 20:26:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1428 transitions. [2023-04-01 20:26:50,387 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1428 transitions. Word has length 209 [2023-04-01 20:26:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:50,387 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1428 transitions. [2023-04-01 20:26:50,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 4 states have internal predecessors, (203), 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) [2023-04-01 20:26:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1428 transitions. [2023-04-01 20:26:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-01 20:26:50,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:50,393 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 20:26:50,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:26:50,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:50,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1123650435, now seen corresponding path program 1 times [2023-04-01 20:26:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064088130] [2023-04-01 20:26:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:50,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064088130] [2023-04-01 20:26:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064088130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:51,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:26:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694632991] [2023-04-01 20:26:51,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:51,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:26:51,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:26:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:51,071 INFO L87 Difference]: Start difference. First operand 936 states and 1428 transitions. Second operand has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 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) [2023-04-01 20:26:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:53,775 INFO L93 Difference]: Finished difference Result 3686 states and 5860 transitions. [2023-04-01 20:26:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:26:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 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 210 [2023-04-01 20:26:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:53,789 INFO L225 Difference]: With dead ends: 3686 [2023-04-01 20:26:53,789 INFO L226 Difference]: Without dead ends: 2756 [2023-04-01 20:26:53,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:26:53,793 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:53,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 159 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 20:26:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2023-04-01 20:26:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2712. [2023-04-01 20:26:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2641 states have (on average 1.408936009087467) internal successors, (3721), 2684 states have internal predecessors, (3721), 14 states have call successors, (14), 14 states have call predecessors, (14), 56 states have return successors, (213), 13 states have call predecessors, (213), 13 states have call successors, (213) [2023-04-01 20:26:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3948 transitions. [2023-04-01 20:26:53,919 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3948 transitions. Word has length 210 [2023-04-01 20:26:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:53,920 INFO L495 AbstractCegarLoop]: Abstraction has 2712 states and 3948 transitions. [2023-04-01 20:26:53,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 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) [2023-04-01 20:26:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3948 transitions. [2023-04-01 20:26:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-04-01 20:26:53,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:53,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:53,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:26:53,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:53,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1924267066, now seen corresponding path program 1 times [2023-04-01 20:26:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:53,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728699839] [2023-04-01 20:26:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:54,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728699839] [2023-04-01 20:26:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728699839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:54,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:26:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892601338] [2023-04-01 20:26:54,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:54,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:26:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:26:54,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:54,975 INFO L87 Difference]: Start difference. First operand 2712 states and 3948 transitions. Second operand has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 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) [2023-04-01 20:26:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:56,929 INFO L93 Difference]: Finished difference Result 6852 states and 10215 transitions. [2023-04-01 20:26:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:26:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 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 211 [2023-04-01 20:26:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:56,949 INFO L225 Difference]: With dead ends: 6852 [2023-04-01 20:26:56,949 INFO L226 Difference]: Without dead ends: 4146 [2023-04-01 20:26:56,955 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 [2023-04-01 20:26:56,962 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1203 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:56,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 118 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 20:26:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2023-04-01 20:26:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4075. [2023-04-01 20:26:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3943 states have (on average 1.3783920872432158) internal successors, (5435), 4035 states have internal predecessors, (5435), 20 states have call successors, (20), 20 states have call predecessors, (20), 111 states have return successors, (410), 19 states have call predecessors, (410), 19 states have call successors, (410) [2023-04-01 20:26:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 5865 transitions. [2023-04-01 20:26:57,100 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 5865 transitions. Word has length 211 [2023-04-01 20:26:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:57,100 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 5865 transitions. [2023-04-01 20:26:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 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) [2023-04-01 20:26:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 5865 transitions. [2023-04-01 20:26:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-01 20:26:57,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:57,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:57,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 20:26:57,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:57,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1597146381, now seen corresponding path program 1 times [2023-04-01 20:26:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181305304] [2023-04-01 20:26:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:57,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:58,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:58,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181305304] [2023-04-01 20:26:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181305304] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390469875] [2023-04-01 20:26:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:58,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:58,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:58,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:26:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:59,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:26:59,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:59,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:59,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390469875] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:59,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:59,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 20:26:59,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982952465] [2023-04-01 20:26:59,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:59,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:59,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:59,610 INFO L87 Difference]: Start difference. First operand 4075 states and 5865 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:27:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:00,444 INFO L93 Difference]: Finished difference Result 12014 states and 17852 transitions. [2023-04-01 20:27:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:27:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2023-04-01 20:27:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:00,480 INFO L225 Difference]: With dead ends: 12014 [2023-04-01 20:27:00,481 INFO L226 Difference]: Without dead ends: 7945 [2023-04-01 20:27:00,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:27:00,493 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 72 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:00,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 414 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:27:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2023-04-01 20:27:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 7939. [2023-04-01 20:27:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7939 states, 7706 states have (on average 1.3102777056838828) internal successors, (10097), 7863 states have internal predecessors, (10097), 38 states have call successors, (38), 38 states have call predecessors, (38), 194 states have return successors, (1089), 37 states have call predecessors, (1089), 37 states have call successors, (1089) [2023-04-01 20:27:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7939 states to 7939 states and 11224 transitions. [2023-04-01 20:27:00,731 INFO L78 Accepts]: Start accepts. Automaton has 7939 states and 11224 transitions. Word has length 218 [2023-04-01 20:27:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:00,731 INFO L495 AbstractCegarLoop]: Abstraction has 7939 states and 11224 transitions. [2023-04-01 20:27:00,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:27:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7939 states and 11224 transitions. [2023-04-01 20:27:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-04-01 20:27:00,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:00,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:27:00,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:00,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:00,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:00,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash -782612098, now seen corresponding path program 1 times [2023-04-01 20:27:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:00,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645681705] [2023-04-01 20:27:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:27:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:02,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645681705] [2023-04-01 20:27:02,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645681705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:02,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610671318] [2023-04-01 20:27:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:02,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:02,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:02,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:02,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:27:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:02,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:27:02,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:27:02,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:02,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610671318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:02,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:02,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-04-01 20:27:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409302950] [2023-04-01 20:27:02,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:02,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:27:02,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:27:02,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:02,563 INFO L87 Difference]: Start difference. First operand 7939 states and 11224 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:27:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:03,447 INFO L93 Difference]: Finished difference Result 22708 states and 32879 transitions. [2023-04-01 20:27:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:27:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 222 [2023-04-01 20:27:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:03,526 INFO L225 Difference]: With dead ends: 22708 [2023-04-01 20:27:03,526 INFO L226 Difference]: Without dead ends: 14775 [2023-04-01 20:27:03,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:03,551 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:03,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 429 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:27:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2023-04-01 20:27:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 14717. [2023-04-01 20:27:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14717 states, 14343 states have (on average 1.2929652095098654) internal successors, (18545), 14577 states have internal predecessors, (18545), 70 states have call successors, (70), 70 states have call predecessors, (70), 303 states have return successors, (2495), 69 states have call predecessors, (2495), 69 states have call successors, (2495) [2023-04-01 20:27:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14717 states to 14717 states and 21110 transitions. [2023-04-01 20:27:04,120 INFO L78 Accepts]: Start accepts. Automaton has 14717 states and 21110 transitions. Word has length 222 [2023-04-01 20:27:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:04,120 INFO L495 AbstractCegarLoop]: Abstraction has 14717 states and 21110 transitions. [2023-04-01 20:27:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:27:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 14717 states and 21110 transitions. [2023-04-01 20:27:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 20:27:04,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:04,160 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:27:04,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 20:27:04,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:04,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1360604173, now seen corresponding path program 1 times [2023-04-01 20:27:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:04,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232388516] [2023-04-01 20:27:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:04,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:05,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:05,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:27:05,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:05,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232388516] [2023-04-01 20:27:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232388516] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473766665] [2023-04-01 20:27:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:05,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:05,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:05,481 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) [2023-04-01 20:27:05,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:27:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:05,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:27:05,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:27:05,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:27:05,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473766665] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:05,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:27:05,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2023-04-01 20:27:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813372846] [2023-04-01 20:27:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:05,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:27:05,989 INFO L87 Difference]: Start difference. First operand 14717 states and 21110 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:27:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:07,028 INFO L93 Difference]: Finished difference Result 29616 states and 42666 transitions. [2023-04-01 20:27:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:27:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 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 225 [2023-04-01 20:27:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:07,082 INFO L225 Difference]: With dead ends: 29616 [2023-04-01 20:27:07,082 INFO L226 Difference]: Without dead ends: 14905 [2023-04-01 20:27:07,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 444 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:27:07,121 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 785 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:07,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 153 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:27:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14905 states. [2023-04-01 20:27:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14905 to 14881. [2023-04-01 20:27:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14881 states, 14425 states have (on average 1.2401386481802426) internal successors, (17889), 14741 states have internal predecessors, (17889), 70 states have call successors, (70), 70 states have call predecessors, (70), 385 states have return successors, (2192), 69 states have call predecessors, (2192), 69 states have call successors, (2192) [2023-04-01 20:27:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14881 states to 14881 states and 20151 transitions. [2023-04-01 20:27:07,533 INFO L78 Accepts]: Start accepts. Automaton has 14881 states and 20151 transitions. Word has length 225 [2023-04-01 20:27:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:07,534 INFO L495 AbstractCegarLoop]: Abstraction has 14881 states and 20151 transitions. [2023-04-01 20:27:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:27:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 14881 states and 20151 transitions. [2023-04-01 20:27:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-04-01 20:27:07,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:07,582 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:27:07,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:07,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:07,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:07,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 723386653, now seen corresponding path program 1 times [2023-04-01 20:27:07,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:07,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576604507] [2023-04-01 20:27:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:07,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:08,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:08,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:27:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:08,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 20:27:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 20:27:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576604507] [2023-04-01 20:27:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576604507] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464161653] [2023-04-01 20:27:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:08,303 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) [2023-04-01 20:27:08,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:27:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:08,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:27:08,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:27:08,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464161653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:08,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:27:08,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69708834] [2023-04-01 20:27:08,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:08,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:08,638 INFO L87 Difference]: Start difference. First operand 14881 states and 20151 transitions. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:27:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:09,417 INFO L93 Difference]: Finished difference Result 44444 states and 62763 transitions. [2023-04-01 20:27:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:27:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 244 [2023-04-01 20:27:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:09,534 INFO L225 Difference]: With dead ends: 44444 [2023-04-01 20:27:09,534 INFO L226 Difference]: Without dead ends: 29569 [2023-04-01 20:27:09,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:09,572 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1080 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:09,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 917 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:27:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29569 states. [2023-04-01 20:27:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29569 to 29299. [2023-04-01 20:27:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29299 states, 28400 states have (on average 1.240105633802817) internal successors, (35219), 29027 states have internal predecessors, (35219), 136 states have call successors, (136), 136 states have call predecessors, (136), 762 states have return successors, (4658), 135 states have call predecessors, (4658), 135 states have call successors, (4658) [2023-04-01 20:27:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29299 states to 29299 states and 40013 transitions. [2023-04-01 20:27:10,554 INFO L78 Accepts]: Start accepts. Automaton has 29299 states and 40013 transitions. Word has length 244 [2023-04-01 20:27:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:10,555 INFO L495 AbstractCegarLoop]: Abstraction has 29299 states and 40013 transitions. [2023-04-01 20:27:10,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:27:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 29299 states and 40013 transitions. [2023-04-01 20:27:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-04-01 20:27:10,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:10,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:10,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:10,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:10,817 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:10,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1607055229, now seen corresponding path program 1 times [2023-04-01 20:27:10,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:10,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681839627] [2023-04-01 20:27:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:10,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:11,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 20:27:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 53 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 20:27:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:12,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681839627] [2023-04-01 20:27:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681839627] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:12,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532810803] [2023-04-01 20:27:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:12,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:12,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:12,089 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) [2023-04-01 20:27:12,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:27:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:27:12,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 20:27:12,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532810803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:12,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:27:12,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033448911] [2023-04-01 20:27:12,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:27:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:27:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:12,580 INFO L87 Difference]: Start difference. First operand 29299 states and 40013 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:27:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:13,717 INFO L93 Difference]: Finished difference Result 58598 states and 80050 transitions. [2023-04-01 20:27:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:27:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 257 [2023-04-01 20:27:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:13,813 INFO L225 Difference]: With dead ends: 58598 [2023-04-01 20:27:13,814 INFO L226 Difference]: Without dead ends: 29305 [2023-04-01 20:27:13,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:13,866 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:13,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 415 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:27:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29305 states. [2023-04-01 20:27:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29305 to 29279. [2023-04-01 20:27:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29279 states, 28390 states have (on average 1.23349771046143) internal successors, (35019), 29007 states have internal predecessors, (35019), 136 states have call successors, (136), 136 states have call predecessors, (136), 752 states have return successors, (4514), 135 states have call predecessors, (4514), 135 states have call successors, (4514) [2023-04-01 20:27:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29279 states to 29279 states and 39669 transitions. [2023-04-01 20:27:14,805 INFO L78 Accepts]: Start accepts. Automaton has 29279 states and 39669 transitions. Word has length 257 [2023-04-01 20:27:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:14,806 INFO L495 AbstractCegarLoop]: Abstraction has 29279 states and 39669 transitions. [2023-04-01 20:27:14,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:27:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 29279 states and 39669 transitions. [2023-04-01 20:27:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-04-01 20:27:14,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:14,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:14,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:15,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:15,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2011532503, now seen corresponding path program 1 times [2023-04-01 20:27:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409507459] [2023-04-01 20:27:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:15,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:27:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:27:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409507459] [2023-04-01 20:27:16,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409507459] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151557918] [2023-04-01 20:27:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:16,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:16,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:16,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:27:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:16,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:27:16,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:16,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:16,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151557918] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:16,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:16,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:27:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185494784] [2023-04-01 20:27:16,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:16,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:27:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:27:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:27:16,575 INFO L87 Difference]: Start difference. First operand 29279 states and 39669 transitions. Second operand has 13 states, 13 states have (on average 25.0) internal successors, (325), 11 states have internal predecessors, (325), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:27:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:28,076 INFO L93 Difference]: Finished difference Result 74176 states and 122810 transitions. [2023-04-01 20:27:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-04-01 20:27:28,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 25.0) internal successors, (325), 11 states have internal predecessors, (325), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 256 [2023-04-01 20:27:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:28,327 INFO L225 Difference]: With dead ends: 74176 [2023-04-01 20:27:28,327 INFO L226 Difference]: Without dead ends: 44903 [2023-04-01 20:27:28,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=885, Invalid=5121, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 20:27:28,387 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 3086 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 9717 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3098 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 10767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 9717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:28,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3098 Valid, 607 Invalid, 10767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 9717 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-04-01 20:27:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44903 states. [2023-04-01 20:27:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44903 to 42321. [2023-04-01 20:27:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42321 states, 40955 states have (on average 1.1619338298132096) internal successors, (47587), 41918 states have internal predecessors, (47587), 208 states have call successors, (208), 195 states have call predecessors, (208), 1157 states have return successors, (5520), 207 states have call predecessors, (5520), 207 states have call successors, (5520) [2023-04-01 20:27:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42321 states to 42321 states and 53315 transitions. [2023-04-01 20:27:30,154 INFO L78 Accepts]: Start accepts. Automaton has 42321 states and 53315 transitions. Word has length 256 [2023-04-01 20:27:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:30,155 INFO L495 AbstractCegarLoop]: Abstraction has 42321 states and 53315 transitions. [2023-04-01 20:27:30,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.0) internal successors, (325), 11 states have internal predecessors, (325), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:27:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 42321 states and 53315 transitions. [2023-04-01 20:27:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-04-01 20:27:30,229 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:30,229 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, 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] [2023-04-01 20:27:30,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:30,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:30,437 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:30,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -149289417, now seen corresponding path program 1 times [2023-04-01 20:27:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:30,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947058039] [2023-04-01 20:27:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:31,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:31,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:31,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:27:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947058039] [2023-04-01 20:27:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947058039] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664020319] [2023-04-01 20:27:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:31,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:31,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:31,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:31,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:27:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:31,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:27:31,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:27:32,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:27:32,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664020319] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:32,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:32,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2023-04-01 20:27:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704771119] [2023-04-01 20:27:32,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:32,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:27:32,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:32,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:27:32,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:32,554 INFO L87 Difference]: Start difference. First operand 42321 states and 53315 transitions. Second operand has 10 states, 10 states have (on average 67.6) internal successors, (676), 8 states have internal predecessors, (676), 4 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:27:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:35,100 INFO L93 Difference]: Finished difference Result 98042 states and 127146 transitions. [2023-04-01 20:27:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:27:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 67.6) internal successors, (676), 8 states have internal predecessors, (676), 4 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 305 [2023-04-01 20:27:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:35,101 INFO L225 Difference]: With dead ends: 98042 [2023-04-01 20:27:35,101 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 20:27:35,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 614 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:27:35,235 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1614 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:35,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1614 Valid, 63 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:27:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 20:27:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 20:27:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 20:27:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 20:27:35,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 305 [2023-04-01 20:27:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:35,237 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 20:27:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.6) internal successors, (676), 8 states have internal predecessors, (676), 4 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:27:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 20:27:35,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 20:27:35,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:27:35,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:35,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.