/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/Problem11_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:18:09,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:18:09,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:18:09,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:18:09,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:18:09,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:18:09,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:18:09,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:18:10,009 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:18:10,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:18:10,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:18:10,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:18:10,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:18:10,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:18:10,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:18:10,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:18:10,012 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:18:10,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:18:10,012 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:18:10,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:18:10,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:18:10,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:18:10,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:18:10,015 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:18:10,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:18:10,015 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:18:10,015 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:18:10,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:18:10,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:18:10,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:18:10,188 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:18:10,189 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:18:10,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label56.c [2023-03-30 23:18:11,250 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:18:11,478 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:18:11,478 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label56.c [2023-03-30 23:18:11,491 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9822f084a/76925055a4c84b96b2381d2c968490c9/FLAG9c7ec6fe5 [2023-03-30 23:18:11,503 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9822f084a/76925055a4c84b96b2381d2c968490c9 [2023-03-30 23:18:11,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:18:11,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:18:11,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:18:11,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:18:11,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:18:11,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:18:11" (1/1) ... [2023-03-30 23:18:11,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f94c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:11, skipping insertion in model container [2023-03-30 23:18:11,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:18:11" (1/1) ... [2023-03-30 23:18:11,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:18:11,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:18:11,748 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/Problem11_label56.c[5994,6007] [2023-03-30 23:18:11,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:18:11,923 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:18:11,939 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/Problem11_label56.c[5994,6007] [2023-03-30 23:18:12,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:18:12,059 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:18:12,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12 WrapperNode [2023-03-30 23:18:12,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:18:12,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:18:12,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:18:12,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:18:12,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,155 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:18:12,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:18:12,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:18:12,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:18:12,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (1/1) ... [2023-03-30 23:18:12,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:18:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:12,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:18:12,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:18:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:18:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:18:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:18:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:18:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:18:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:18:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:18:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:18:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:18:12,280 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:18:12,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:18:13,345 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:18:13,357 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:18:13,357 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:18:13,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:18:13 BoogieIcfgContainer [2023-03-30 23:18:13,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:18:13,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:18:13,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:18:13,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:18:13,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:18:11" (1/3) ... [2023-03-30 23:18:13,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417da889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:18:13, skipping insertion in model container [2023-03-30 23:18:13,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:18:12" (2/3) ... [2023-03-30 23:18:13,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417da889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:18:13, skipping insertion in model container [2023-03-30 23:18:13,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:18:13" (3/3) ... [2023-03-30 23:18:13,371 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label56.c [2023-03-30 23:18:13,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:18:13,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:18:13,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:18:13,446 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;@34ad7191, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:18:13,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:18:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 292 states, 284 states have (on average 1.7077464788732395) internal successors, (485), 285 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:18:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 23:18:13,458 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:13,459 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] [2023-03-30 23:18:13,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:13,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1384529190, now seen corresponding path program 1 times [2023-03-30 23:18:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860241789] [2023-03-30 23:18:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:13,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860241789] [2023-03-30 23:18:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860241789] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:18:13,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:18:13,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778299790] [2023-03-30 23:18:13,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:18:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:18:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:18:13,933 INFO L87 Difference]: Start difference. First operand has 292 states, 284 states have (on average 1.7077464788732395) internal successors, (485), 285 states have internal predecessors, (485), 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:18:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:15,236 INFO L93 Difference]: Finished difference Result 791 states and 1386 transitions. [2023-03-30 23:18:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:18:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 47 [2023-03-30 23:18:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:15,247 INFO L225 Difference]: With dead ends: 791 [2023-03-30 23:18:15,247 INFO L226 Difference]: Without dead ends: 434 [2023-03-30 23:18:15,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:18:15,265 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 648 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:15,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 59 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 23:18:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-03-30 23:18:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 430. [2023-03-30 23:18:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 420 states have (on average 1.4452380952380952) internal successors, (607), 422 states have internal predecessors, (607), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:18:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 618 transitions. [2023-03-30 23:18:15,324 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 618 transitions. Word has length 47 [2023-03-30 23:18:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:15,324 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 618 transitions. [2023-03-30 23:18:15,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:18:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 618 transitions. [2023-03-30 23:18:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-30 23:18:15,329 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:15,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:15,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:18:15,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:15,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1448785154, now seen corresponding path program 1 times [2023-03-30 23:18:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:15,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651529068] [2023-03-30 23:18:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:15,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:15,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651529068] [2023-03-30 23:18:15,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651529068] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:15,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:18:15,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:18:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104722237] [2023-03-30 23:18:15,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:15,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:18:15,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:18:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:18:15,728 INFO L87 Difference]: Start difference. First operand 430 states and 618 transitions. Second operand has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:18:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:17,368 INFO L93 Difference]: Finished difference Result 1664 states and 2471 transitions. [2023-03-30 23:18:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-30 23:18:17,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 119 [2023-03-30 23:18:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:17,375 INFO L225 Difference]: With dead ends: 1664 [2023-03-30 23:18:17,375 INFO L226 Difference]: Without dead ends: 1240 [2023-03-30 23:18:17,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:18:17,377 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1649 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:17,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 146 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 23:18:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2023-03-30 23:18:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1208. [2023-03-30 23:18:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1181 states have (on average 1.3767993226079593) internal successors, (1626), 1192 states have internal predecessors, (1626), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) [2023-03-30 23:18:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1689 transitions. [2023-03-30 23:18:17,416 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1689 transitions. Word has length 119 [2023-03-30 23:18:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:17,416 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1689 transitions. [2023-03-30 23:18:17,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:18:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1689 transitions. [2023-03-30 23:18:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-30 23:18:17,418 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:17,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:18:17,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:17,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1517781598, now seen corresponding path program 1 times [2023-03-30 23:18:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:17,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470943314] [2023-03-30 23:18:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:17,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:17,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470943314] [2023-03-30 23:18:17,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470943314] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757160808] [2023-03-30 23:18:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:17,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:17,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:17,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:18:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:17,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:18:17,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:18,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:18:18,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757160808] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:18,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:18:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-30 23:18:18,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161601598] [2023-03-30 23:18:18,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:18,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:18:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:18:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:18:18,115 INFO L87 Difference]: Start difference. First operand 1208 states and 1689 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:18:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:18,984 INFO L93 Difference]: Finished difference Result 3042 states and 4229 transitions. [2023-03-30 23:18:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:18:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 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 121 [2023-03-30 23:18:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:18,991 INFO L225 Difference]: With dead ends: 3042 [2023-03-30 23:18:18,991 INFO L226 Difference]: Without dead ends: 1840 [2023-03-30 23:18:18,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:18:18,994 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 496 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:18,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 126 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 23:18:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2023-03-30 23:18:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1810. [2023-03-30 23:18:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1758 states have (on average 1.2667804323094425) internal successors, (2227), 1788 states have internal predecessors, (2227), 11 states have call successors, (11), 11 states have call predecessors, (11), 40 states have return successors, (128), 10 states have call predecessors, (128), 10 states have call successors, (128) [2023-03-30 23:18:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2366 transitions. [2023-03-30 23:18:19,064 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2366 transitions. Word has length 121 [2023-03-30 23:18:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:19,065 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 2366 transitions. [2023-03-30 23:18:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:18:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2366 transitions. [2023-03-30 23:18:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-03-30 23:18:19,075 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:19,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:19,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:19,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:19,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:19,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1581361940, now seen corresponding path program 1 times [2023-03-30 23:18:19,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:19,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044321582] [2023-03-30 23:18:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:19,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:19,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:19,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044321582] [2023-03-30 23:18:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044321582] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:19,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797482444] [2023-03-30 23:18:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:19,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:19,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:18:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:19,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:19,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:19,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:18:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797482444] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:19,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:18:19,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:18:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808224969] [2023-03-30 23:18:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:19,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:18:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:18:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:18:19,705 INFO L87 Difference]: Start difference. First operand 1810 states and 2366 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:18:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:20,301 INFO L93 Difference]: Finished difference Result 4013 states and 5362 transitions. [2023-03-30 23:18:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:18:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 178 [2023-03-30 23:18:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:20,308 INFO L225 Difference]: With dead ends: 4013 [2023-03-30 23:18:20,308 INFO L226 Difference]: Without dead ends: 2397 [2023-03-30 23:18:20,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:18:20,311 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 171 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:20,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 321 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 23:18:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2023-03-30 23:18:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2195. [2023-03-30 23:18:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2135 states have (on average 1.244496487119438) internal successors, (2657), 2169 states have internal predecessors, (2657), 13 states have call successors, (13), 13 states have call predecessors, (13), 46 states have return successors, (165), 12 states have call predecessors, (165), 12 states have call successors, (165) [2023-03-30 23:18:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 2835 transitions. [2023-03-30 23:18:20,353 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 2835 transitions. Word has length 178 [2023-03-30 23:18:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:20,353 INFO L495 AbstractCegarLoop]: Abstraction has 2195 states and 2835 transitions. [2023-03-30 23:18:20,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:18:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 2835 transitions. [2023-03-30 23:18:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-03-30 23:18:20,356 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:20,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:20,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:18:20,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:20,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 382609708, now seen corresponding path program 1 times [2023-03-30 23:18:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311031910] [2023-03-30 23:18:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-30 23:18:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311031910] [2023-03-30 23:18:20,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311031910] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276938811] [2023-03-30 23:18:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:20,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:20,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:20,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:18:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 23:18:20,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 71 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:21,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-30 23:18:22,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276938811] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:22,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:18:22,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 9] total 13 [2023-03-30 23:18:22,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98851245] [2023-03-30 23:18:22,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:22,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:18:22,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:18:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:18:22,123 INFO L87 Difference]: Start difference. First operand 2195 states and 2835 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:22,755 INFO L93 Difference]: Finished difference Result 5548 states and 7478 transitions. [2023-03-30 23:18:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:18:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 237 [2023-03-30 23:18:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:22,768 INFO L225 Difference]: With dead ends: 5548 [2023-03-30 23:18:22,769 INFO L226 Difference]: Without dead ends: 3547 [2023-03-30 23:18:22,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 472 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:18:22,774 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 190 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:22,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 92 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:18:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2023-03-30 23:18:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3544. [2023-03-30 23:18:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3454 states have (on average 1.265778807180081) internal successors, (4372), 3504 states have internal predecessors, (4372), 20 states have call successors, (20), 20 states have call predecessors, (20), 69 states have return successors, (358), 19 states have call predecessors, (358), 19 states have call successors, (358) [2023-03-30 23:18:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 4750 transitions. [2023-03-30 23:18:22,843 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 4750 transitions. Word has length 237 [2023-03-30 23:18:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:22,844 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 4750 transitions. [2023-03-30 23:18:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 4750 transitions. [2023-03-30 23:18:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-03-30 23:18:22,846 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:22,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:22,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:18:23,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:23,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:23,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1575672288, now seen corresponding path program 1 times [2023-03-30 23:18:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:23,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861632928] [2023-03-30 23:18:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:23,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:23,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:23,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:23,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 23:18:23,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861632928] [2023-03-30 23:18:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861632928] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107555598] [2023-03-30 23:18:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:23,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:23,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:18:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:23,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 23:18:23,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 23:18:23,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:18:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107555598] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:18:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:18:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313561836] [2023-03-30 23:18:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:23,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:18:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:18:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:18:23,481 INFO L87 Difference]: Start difference. First operand 3544 states and 4750 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:24,133 INFO L93 Difference]: Finished difference Result 8442 states and 11884 transitions. [2023-03-30 23:18:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:18:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 247 [2023-03-30 23:18:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:24,151 INFO L225 Difference]: With dead ends: 8442 [2023-03-30 23:18:24,151 INFO L226 Difference]: Without dead ends: 5092 [2023-03-30 23:18:24,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:18:24,158 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 176 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:24,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 404 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:18:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5092 states. [2023-03-30 23:18:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5092 to 5090. [2023-03-30 23:18:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5090 states, 4969 states have (on average 1.2714831958140471) internal successors, (6318), 5034 states have internal predecessors, (6318), 28 states have call successors, (28), 28 states have call predecessors, (28), 92 states have return successors, (670), 27 states have call predecessors, (670), 27 states have call successors, (670) [2023-03-30 23:18:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 7016 transitions. [2023-03-30 23:18:24,276 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 7016 transitions. Word has length 247 [2023-03-30 23:18:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:24,276 INFO L495 AbstractCegarLoop]: Abstraction has 5090 states and 7016 transitions. [2023-03-30 23:18:24,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 7016 transitions. [2023-03-30 23:18:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-03-30 23:18:24,281 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:24,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:18:24,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:24,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:24,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash 612499359, now seen corresponding path program 1 times [2023-03-30 23:18:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:24,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833939391] [2023-03-30 23:18:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:24,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:25,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:18:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-03-30 23:18:25,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:25,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833939391] [2023-03-30 23:18:25,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833939391] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:25,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662236437] [2023-03-30 23:18:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:25,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:25,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:25,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:18:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:25,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:18:25,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-03-30 23:18:25,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:18:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662236437] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:25,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:25,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2023-03-30 23:18:25,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100293654] [2023-03-30 23:18:25,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:25,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:18:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:18:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:18:25,843 INFO L87 Difference]: Start difference. First operand 5090 states and 7016 transitions. Second operand has 13 states, 13 states have (on average 41.61538461538461) internal successors, (541), 11 states have internal predecessors, (541), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:18:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:28,860 INFO L93 Difference]: Finished difference Result 16651 states and 24659 transitions. [2023-03-30 23:18:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 23:18:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 41.61538461538461) internal successors, (541), 11 states have internal predecessors, (541), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 286 [2023-03-30 23:18:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:28,909 INFO L225 Difference]: With dead ends: 16651 [2023-03-30 23:18:28,909 INFO L226 Difference]: Without dead ends: 11755 [2023-03-30 23:18:28,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 581 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2023-03-30 23:18:28,921 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1536 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 3601 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 4317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 3601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:28,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 220 Invalid, 4317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 3601 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:18:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11755 states. [2023-03-30 23:18:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11755 to 10372. [2023-03-30 23:18:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10372 states, 10102 states have (on average 1.22817263908137) internal successors, (12407), 10262 states have internal predecessors, (12407), 55 states have call successors, (55), 55 states have call predecessors, (55), 214 states have return successors, (1832), 54 states have call predecessors, (1832), 54 states have call successors, (1832) [2023-03-30 23:18:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10372 states to 10372 states and 14294 transitions. [2023-03-30 23:18:29,169 INFO L78 Accepts]: Start accepts. Automaton has 10372 states and 14294 transitions. Word has length 286 [2023-03-30 23:18:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:29,169 INFO L495 AbstractCegarLoop]: Abstraction has 10372 states and 14294 transitions. [2023-03-30 23:18:29,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.61538461538461) internal successors, (541), 11 states have internal predecessors, (541), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:18:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10372 states and 14294 transitions. [2023-03-30 23:18:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2023-03-30 23:18:29,181 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:29,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:29,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:29,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:29,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:29,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1079126113, now seen corresponding path program 1 times [2023-03-30 23:18:29,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400482228] [2023-03-30 23:18:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:29,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:18:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:29,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2023-03-30 23:18:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-30 23:18:29,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400482228] [2023-03-30 23:18:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400482228] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898960250] [2023-03-30 23:18:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:29,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:29,730 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) [2023-03-30 23:18:29,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:18:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:29,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:29,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 299 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-03-30 23:18:29,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 299 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-03-30 23:18:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898960250] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:30,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:18:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271484728] [2023-03-30 23:18:30,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:18:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:18:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:18:30,208 INFO L87 Difference]: Start difference. First operand 10372 states and 14294 transitions. Second operand has 11 states, 11 states have (on average 44.81818181818182) internal successors, (493), 9 states have internal predecessors, (493), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:18:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:32,747 INFO L93 Difference]: Finished difference Result 24542 states and 35520 transitions. [2023-03-30 23:18:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-03-30 23:18:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 44.81818181818182) internal successors, (493), 9 states have internal predecessors, (493), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 356 [2023-03-30 23:18:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:32,841 INFO L225 Difference]: With dead ends: 24542 [2023-03-30 23:18:32,841 INFO L226 Difference]: Without dead ends: 14364 [2023-03-30 23:18:32,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 737 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1255, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 23:18:32,862 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1637 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:32,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 251 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 23:18:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14364 states. [2023-03-30 23:18:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14364 to 13075. [2023-03-30 23:18:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13075 states, 12738 states have (on average 1.1666666666666667) internal successors, (14861), 12937 states have internal predecessors, (14861), 69 states have call successors, (69), 69 states have call predecessors, (69), 267 states have return successors, (1807), 68 states have call predecessors, (1807), 68 states have call successors, (1807) [2023-03-30 23:18:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13075 states to 13075 states and 16737 transitions. [2023-03-30 23:18:33,147 INFO L78 Accepts]: Start accepts. Automaton has 13075 states and 16737 transitions. Word has length 356 [2023-03-30 23:18:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:33,147 INFO L495 AbstractCegarLoop]: Abstraction has 13075 states and 16737 transitions. [2023-03-30 23:18:33,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 44.81818181818182) internal successors, (493), 9 states have internal predecessors, (493), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:18:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 13075 states and 16737 transitions. [2023-03-30 23:18:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-03-30 23:18:33,157 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:33,158 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:33,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:33,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:33,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:33,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash -229209929, now seen corresponding path program 1 times [2023-03-30 23:18:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222630977] [2023-03-30 23:18:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:33,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:33,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:18:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 85 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:18:33,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222630977] [2023-03-30 23:18:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222630977] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823922692] [2023-03-30 23:18:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:33,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:33,827 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) [2023-03-30 23:18:33,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:18:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:33,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:33,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-03-30 23:18:34,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:18:34,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823922692] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:34,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:18:34,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:18:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331462032] [2023-03-30 23:18:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:18:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:18:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:18:34,022 INFO L87 Difference]: Start difference. First operand 13075 states and 16737 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:34,600 INFO L93 Difference]: Finished difference Result 27669 states and 35435 transitions. [2023-03-30 23:18:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:18:34,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 357 [2023-03-30 23:18:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:34,633 INFO L225 Difference]: With dead ends: 27669 [2023-03-30 23:18:34,633 INFO L226 Difference]: Without dead ends: 14978 [2023-03-30 23:18:34,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:18:34,655 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 182 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:34,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 164 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 23:18:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14978 states. [2023-03-30 23:18:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14978 to 14976. [2023-03-30 23:18:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14976 states, 14608 states have (on average 1.1596385542168675) internal successors, (16940), 14818 states have internal predecessors, (16940), 79 states have call successors, (79), 79 states have call predecessors, (79), 288 states have return successors, (2067), 78 states have call predecessors, (2067), 78 states have call successors, (2067) [2023-03-30 23:18:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14976 states to 14976 states and 19086 transitions. [2023-03-30 23:18:34,972 INFO L78 Accepts]: Start accepts. Automaton has 14976 states and 19086 transitions. Word has length 357 [2023-03-30 23:18:34,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:34,972 INFO L495 AbstractCegarLoop]: Abstraction has 14976 states and 19086 transitions. [2023-03-30 23:18:34,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 14976 states and 19086 transitions. [2023-03-30 23:18:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-03-30 23:18:34,989 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:34,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:34,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:35,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:35,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:35,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -475677433, now seen corresponding path program 1 times [2023-03-30 23:18:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610360233] [2023-03-30 23:18:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:35,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:35,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:35,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:35,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-03-30 23:18:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 319 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-03-30 23:18:35,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:35,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610360233] [2023-03-30 23:18:35,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610360233] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:35,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463136437] [2023-03-30 23:18:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:35,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:35,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:35,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:35,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 23:18:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:35,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:35,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-30 23:18:35,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-30 23:18:36,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463136437] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:36,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:36,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:18:36,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900669194] [2023-03-30 23:18:36,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:36,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:18:36,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:18:36,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:18:36,073 INFO L87 Difference]: Start difference. First operand 14976 states and 19086 transitions. Second operand has 11 states, 11 states have (on average 43.0) internal successors, (473), 9 states have internal predecessors, (473), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:18:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:37,769 INFO L93 Difference]: Finished difference Result 33005 states and 42421 transitions. [2023-03-30 23:18:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:18:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 43.0) internal successors, (473), 9 states have internal predecessors, (473), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 396 [2023-03-30 23:18:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:37,812 INFO L225 Difference]: With dead ends: 33005 [2023-03-30 23:18:37,812 INFO L226 Difference]: Without dead ends: 17643 [2023-03-30 23:18:37,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 802 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:18:37,830 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1135 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:37,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 148 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:18:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17643 states. [2023-03-30 23:18:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17643 to 16439. [2023-03-30 23:18:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16439 states, 16006 states have (on average 1.1523178807947019) internal successors, (18444), 16267 states have internal predecessors, (18444), 86 states have call successors, (86), 86 states have call predecessors, (86), 346 states have return successors, (2282), 85 states have call predecessors, (2282), 85 states have call successors, (2282) [2023-03-30 23:18:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16439 states to 16439 states and 20812 transitions. [2023-03-30 23:18:38,203 INFO L78 Accepts]: Start accepts. Automaton has 16439 states and 20812 transitions. Word has length 396 [2023-03-30 23:18:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:38,204 INFO L495 AbstractCegarLoop]: Abstraction has 16439 states and 20812 transitions. [2023-03-30 23:18:38,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 43.0) internal successors, (473), 9 states have internal predecessors, (473), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:18:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16439 states and 20812 transitions. [2023-03-30 23:18:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2023-03-30 23:18:38,230 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:38,230 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:38,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-30 23:18:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 23:18:38,436 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:38,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -480450349, now seen corresponding path program 1 times [2023-03-30 23:18:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:38,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875272103] [2023-03-30 23:18:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:38,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:18:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:38,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2023-03-30 23:18:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 174 proven. 4 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2023-03-30 23:18:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875272103] [2023-03-30 23:18:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875272103] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402571262] [2023-03-30 23:18:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:38,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:38,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:38,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 23:18:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:39,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 23:18:39,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2023-03-30 23:18:39,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:18:39,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402571262] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:39,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:18:39,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-03-30 23:18:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112517914] [2023-03-30 23:18:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:39,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:18:39,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:18:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:18:39,086 INFO L87 Difference]: Start difference. First operand 16439 states and 20812 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:40,098 INFO L93 Difference]: Finished difference Result 35920 states and 45676 transitions. [2023-03-30 23:18:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 23:18:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 488 [2023-03-30 23:18:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:40,141 INFO L225 Difference]: With dead ends: 35920 [2023-03-30 23:18:40,141 INFO L226 Difference]: Without dead ends: 19281 [2023-03-30 23:18:40,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:18:40,163 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 383 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:40,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 392 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 23:18:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19281 states. [2023-03-30 23:18:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19281 to 18339. [2023-03-30 23:18:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 17880 states have (on average 1.1373601789709171) internal successors, (20336), 18147 states have internal predecessors, (20336), 96 states have call successors, (96), 96 states have call predecessors, (96), 362 states have return successors, (2388), 95 states have call predecessors, (2388), 95 states have call successors, (2388) [2023-03-30 23:18:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 22820 transitions. [2023-03-30 23:18:40,437 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 22820 transitions. Word has length 488 [2023-03-30 23:18:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:40,437 INFO L495 AbstractCegarLoop]: Abstraction has 18339 states and 22820 transitions. [2023-03-30 23:18:40,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:18:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 22820 transitions. [2023-03-30 23:18:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2023-03-30 23:18:40,496 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:40,496 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:18:40,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:40,705 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:40,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash -752998987, now seen corresponding path program 1 times [2023-03-30 23:18:40,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:40,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278033384] [2023-03-30 23:18:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:40,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:41,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:41,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:18:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:41,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2023-03-30 23:18:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 251 proven. 168 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-03-30 23:18:41,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278033384] [2023-03-30 23:18:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278033384] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601044969] [2023-03-30 23:18:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:41,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 23:18:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:41,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:41,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 468 proven. 2 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-03-30 23:18:41,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 468 proven. 2 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-03-30 23:18:41,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601044969] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:41,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:41,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:18:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677010002] [2023-03-30 23:18:41,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:41,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:18:41,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:18:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:18:41,922 INFO L87 Difference]: Start difference. First operand 18339 states and 22820 transitions. Second operand has 11 states, 11 states have (on average 48.90909090909091) internal successors, (538), 9 states have internal predecessors, (538), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:18:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:44,748 INFO L93 Difference]: Finished difference Result 39727 states and 50530 transitions. [2023-03-30 23:18:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-03-30 23:18:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 48.90909090909091) internal successors, (538), 9 states have internal predecessors, (538), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 488 [2023-03-30 23:18:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:44,796 INFO L225 Difference]: With dead ends: 39727 [2023-03-30 23:18:44,797 INFO L226 Difference]: Without dead ends: 21580 [2023-03-30 23:18:44,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1003 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2023-03-30 23:18:44,822 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1345 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 3240 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 3240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:44,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1347 Valid, 279 Invalid, 3600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 3240 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-30 23:18:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21580 states. [2023-03-30 23:18:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21580 to 20995. [2023-03-30 23:18:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20995 states, 20500 states have (on average 1.1239024390243904) internal successors, (23040), 20775 states have internal predecessors, (23040), 110 states have call successors, (110), 110 states have call predecessors, (110), 384 states have return successors, (2431), 109 states have call predecessors, (2431), 109 states have call successors, (2431) [2023-03-30 23:18:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20995 states to 20995 states and 25581 transitions. [2023-03-30 23:18:45,284 INFO L78 Accepts]: Start accepts. Automaton has 20995 states and 25581 transitions. Word has length 488 [2023-03-30 23:18:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:45,285 INFO L495 AbstractCegarLoop]: Abstraction has 20995 states and 25581 transitions. [2023-03-30 23:18:45,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 48.90909090909091) internal successors, (538), 9 states have internal predecessors, (538), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:18:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 20995 states and 25581 transitions. [2023-03-30 23:18:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-03-30 23:18:45,322 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:45,323 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:45,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:45,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 23:18:45,529 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:45,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1167444225, now seen corresponding path program 1 times [2023-03-30 23:18:45,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:45,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003332879] [2023-03-30 23:18:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:45,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-03-30 23:18:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2023-03-30 23:18:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2023-03-30 23:18:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 177 proven. 338 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-03-30 23:18:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:46,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003332879] [2023-03-30 23:18:46,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003332879] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:46,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054989902] [2023-03-30 23:18:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:46,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:46,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 23:18:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:46,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:18:46,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 477 proven. 4 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-03-30 23:18:46,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 179 proven. 539 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-03-30 23:18:48,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054989902] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:48,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:48,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 18 [2023-03-30 23:18:48,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558258931] [2023-03-30 23:18:48,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:48,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 23:18:48,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 23:18:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:18:48,864 INFO L87 Difference]: Start difference. First operand 20995 states and 25581 transitions. Second operand has 18 states, 18 states have (on average 45.22222222222222) internal successors, (814), 16 states have internal predecessors, (814), 6 states have call successors, (13), 9 states have call predecessors, (13), 12 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-03-30 23:18:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:52,389 INFO L93 Difference]: Finished difference Result 63316 states and 77096 transitions. [2023-03-30 23:18:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-30 23:18:52,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 45.22222222222222) internal successors, (814), 16 states have internal predecessors, (814), 6 states have call successors, (13), 9 states have call predecessors, (13), 12 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 533 [2023-03-30 23:18:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:52,485 INFO L225 Difference]: With dead ends: 63316 [2023-03-30 23:18:52,485 INFO L226 Difference]: Without dead ends: 41931 [2023-03-30 23:18:52,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1084 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 23:18:52,520 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3828 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3956 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 3956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:52,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3831 Valid, 231 Invalid, 4886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 3956 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:18:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41931 states. [2023-03-30 23:18:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41931 to 39207. [2023-03-30 23:18:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39207 states, 38374 states have (on average 1.1097878772085266) internal successors, (42587), 38797 states have internal predecessors, (42587), 205 states have call successors, (205), 205 states have call predecessors, (205), 627 states have return successors, (3924), 204 states have call predecessors, (3924), 204 states have call successors, (3924) [2023-03-30 23:18:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39207 states to 39207 states and 46716 transitions. [2023-03-30 23:18:53,231 INFO L78 Accepts]: Start accepts. Automaton has 39207 states and 46716 transitions. Word has length 533 [2023-03-30 23:18:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:53,231 INFO L495 AbstractCegarLoop]: Abstraction has 39207 states and 46716 transitions. [2023-03-30 23:18:53,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 45.22222222222222) internal successors, (814), 16 states have internal predecessors, (814), 6 states have call successors, (13), 9 states have call predecessors, (13), 12 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-03-30 23:18:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39207 states and 46716 transitions. [2023-03-30 23:18:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-03-30 23:18:53,306 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:53,306 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:53,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:53,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-30 23:18:53,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:53,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1434317844, now seen corresponding path program 1 times [2023-03-30 23:18:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:53,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211269073] [2023-03-30 23:18:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:18:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2023-03-30 23:18:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2023-03-30 23:18:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 537 [2023-03-30 23:18:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 459 proven. 248 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-03-30 23:18:54,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:54,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211269073] [2023-03-30 23:18:54,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211269073] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:54,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412133287] [2023-03-30 23:18:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:54,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:54,639 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:54,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 23:18:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:54,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-30 23:18:54,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 1141 proven. 2 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-03-30 23:18:56,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 463 proven. 244 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-03-30 23:18:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412133287] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:57,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:57,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2023-03-30 23:18:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599502154] [2023-03-30 23:18:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:18:57,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:18:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:18:57,607 INFO L87 Difference]: Start difference. First operand 39207 states and 46716 transitions. Second operand has 16 states, 16 states have (on average 47.375) internal successors, (758), 14 states have internal predecessors, (758), 5 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:19:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:19:00,790 INFO L93 Difference]: Finished difference Result 72453 states and 86204 transitions. [2023-03-30 23:19:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 23:19:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 47.375) internal successors, (758), 14 states have internal predecessors, (758), 5 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 713 [2023-03-30 23:19:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:19:00,866 INFO L225 Difference]: With dead ends: 72453 [2023-03-30 23:19:00,866 INFO L226 Difference]: Without dead ends: 35178 [2023-03-30 23:19:00,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1478 GetRequests, 1445 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 23:19:00,907 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1074 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 4855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:19:00,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 249 Invalid, 4855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-30 23:19:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35178 states. [2023-03-30 23:19:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35178 to 35133. [2023-03-30 23:19:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35133 states, 34373 states have (on average 1.103453291827888) internal successors, (37929), 34765 states have internal predecessors, (37929), 184 states have call successors, (184), 184 states have call predecessors, (184), 575 states have return successors, (3183), 183 states have call predecessors, (3183), 183 states have call successors, (3183) [2023-03-30 23:19:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35133 states to 35133 states and 41296 transitions. [2023-03-30 23:19:01,453 INFO L78 Accepts]: Start accepts. Automaton has 35133 states and 41296 transitions. Word has length 713 [2023-03-30 23:19:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:19:01,454 INFO L495 AbstractCegarLoop]: Abstraction has 35133 states and 41296 transitions. [2023-03-30 23:19:01,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 47.375) internal successors, (758), 14 states have internal predecessors, (758), 5 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:19:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 35133 states and 41296 transitions. [2023-03-30 23:19:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2023-03-30 23:19:01,499 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:19:01,499 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:19:01,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-30 23:19:01,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-30 23:19:01,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:19:01,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:19:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1926500521, now seen corresponding path program 1 times [2023-03-30 23:19:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:19:01,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918609860] [2023-03-30 23:19:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:19:01,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:19:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:19:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:19:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:19:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-03-30 23:19:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 375 [2023-03-30 23:19:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2023-03-30 23:19:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 667 [2023-03-30 23:19:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 632 proven. 268 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-03-30 23:19:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:19:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918609860] [2023-03-30 23:19:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918609860] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:19:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733734119] [2023-03-30 23:19:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:19:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:19:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:19:02,448 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:19:02,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-30 23:19:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:19:02,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:19:02,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:19:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 1535 proven. 2 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2023-03-30 23:19:02,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:19:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 635 proven. 270 refuted. 0 times theorem prover too weak. 1195 trivial. 0 not checked. [2023-03-30 23:19:03,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733734119] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:19:03,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:19:03,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-03-30 23:19:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902179776] [2023-03-30 23:19:03,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:19:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 23:19:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:19:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 23:19:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:19:03,158 INFO L87 Difference]: Start difference. First operand 35133 states and 41296 transitions. Second operand has 9 states, 9 states have (on average 82.0) internal successors, (738), 7 states have internal predecessors, (738), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)