/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/Problem18_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:45:27,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:45:27,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:45:27,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:45:27,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:45:27,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:45:27,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:45:27,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:45:27,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:45:27,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:45:27,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:45:27,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:45:27,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:45:27,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:45:27,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:45:27,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:45:27,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:45:27,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:45:27,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:45:27,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:45:27,580 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 23:45:27,607 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:45:27,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:45:27,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:45:27,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:45:27,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:45:27,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:45:27,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:45:27,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:45:27,609 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:45:27,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:45:27,610 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:45:27,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:45:27,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:45:27,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:45:27,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:45:27,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:45:27,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:45:27,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:45:27,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:45:27,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:45:27,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:45:27,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:45:27,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:45:27,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:45:27,613 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:45:27,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:45:27,613 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:45:27,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:45:27,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:45:27,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:45:27,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:45:27,820 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:45:27,821 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:45:27,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label35.c [2023-03-30 23:45:28,802 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:45:29,169 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:45:29,169 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label35.c [2023-03-30 23:45:29,189 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6312b73d9/253f48441ab7442d943bd724a673136e/FLAG50c58324e [2023-03-30 23:45:29,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6312b73d9/253f48441ab7442d943bd724a673136e [2023-03-30 23:45:29,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:45:29,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:45:29,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:45:29,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:45:29,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:45:29,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:45:29" (1/1) ... [2023-03-30 23:45:29,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d8c4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:29, skipping insertion in model container [2023-03-30 23:45:29,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:45:29" (1/1) ... [2023-03-30 23:45:29,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:45:29,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:45:29,657 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/Problem18_label35.c[1790,1803] [2023-03-30 23:45:30,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:45:30,170 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:45:30,179 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/Problem18_label35.c[1790,1803] [2023-03-30 23:45:30,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:45:30,417 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:45:30,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30 WrapperNode [2023-03-30 23:45:30,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:45:30,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:45:30,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:45:30,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:45:30,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:45:30,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:45:30,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:45:30,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:45:30,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (1/1) ... [2023-03-30 23:45:30,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:45:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:30,622 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 23:45:30,637 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 23:45:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:45:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:45:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:45:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:45:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:45:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:45:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:45:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:45:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:45:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:45:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:45:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:45:30,712 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:45:30,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:45:33,229 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:45:33,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:45:33,238 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:45:33,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:45:33 BoogieIcfgContainer [2023-03-30 23:45:33,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:45:33,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:45:33,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:45:33,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:45:33,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:45:29" (1/3) ... [2023-03-30 23:45:33,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661b03df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:45:33, skipping insertion in model container [2023-03-30 23:45:33,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:30" (2/3) ... [2023-03-30 23:45:33,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661b03df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:45:33, skipping insertion in model container [2023-03-30 23:45:33,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:45:33" (3/3) ... [2023-03-30 23:45:33,246 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label35.c [2023-03-30 23:45:33,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:45:33,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:45:33,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:45:33,307 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;@1c98b035, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:45:33,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:45:33,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 23:45:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-30 23:45:33,318 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:33,318 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] [2023-03-30 23:45:33,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:33,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1283904301, now seen corresponding path program 1 times [2023-03-30 23:45:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148301421] [2023-03-30 23:45:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:33,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:33,629 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 23:45:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:33,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148301421] [2023-03-30 23:45:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148301421] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:33,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:45:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:45:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784430095] [2023-03-30 23:45:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:33,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:45:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:45:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:45:33,656 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 23:45:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:37,661 INFO L93 Difference]: Finished difference Result 2286 states and 4364 transitions. [2023-03-30 23:45:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:45:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 20 [2023-03-30 23:45:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:37,677 INFO L225 Difference]: With dead ends: 2286 [2023-03-30 23:45:37,677 INFO L226 Difference]: Without dead ends: 1432 [2023-03-30 23:45:37,683 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 23:45:37,686 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2265 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2265 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:37,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2265 Valid, 38 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-30 23:45:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-03-30 23:45:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1428. [2023-03-30 23:45:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1406 states have (on average 1.5896159317211949) internal successors, (2235), 1408 states have internal predecessors, (2235), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (19), 11 states have call predecessors, (19), 7 states have call successors, (19) [2023-03-30 23:45:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2262 transitions. [2023-03-30 23:45:37,761 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2262 transitions. Word has length 20 [2023-03-30 23:45:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:37,761 INFO L495 AbstractCegarLoop]: Abstraction has 1428 states and 2262 transitions. [2023-03-30 23:45:37,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 23:45:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2262 transitions. [2023-03-30 23:45:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-03-30 23:45:37,764 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:37,764 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:45:37,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:45:37,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:37,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1552806323, now seen corresponding path program 1 times [2023-03-30 23:45:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836451576] [2023-03-30 23:45:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:37,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:37,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:37,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:37,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836451576] [2023-03-30 23:45:37,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836451576] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:37,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:45:37,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:45:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849813622] [2023-03-30 23:45:37,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:37,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:45:37,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:45:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:37,977 INFO L87 Difference]: Start difference. First operand 1428 states and 2262 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 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 23:45:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:43,771 INFO L93 Difference]: Finished difference Result 5784 states and 9263 transitions. [2023-03-30 23:45:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:45:43,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 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 89 [2023-03-30 23:45:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:43,788 INFO L225 Difference]: With dead ends: 5784 [2023-03-30 23:45:43,788 INFO L226 Difference]: Without dead ends: 4362 [2023-03-30 23:45:43,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:45:43,797 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3829 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 7436 mSolverCounterSat, 1572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 9008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1572 IncrementalHoareTripleChecker+Valid, 7436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:43,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 120 Invalid, 9008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1572 Valid, 7436 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-03-30 23:45:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2023-03-30 23:45:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 4345. [2023-03-30 23:45:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4345 states, 4258 states have (on average 1.3586190699859089) internal successors, (5785), 4274 states have internal predecessors, (5785), 20 states have call successors, (20), 20 states have call predecessors, (20), 66 states have return successors, (175), 50 states have call predecessors, (175), 19 states have call successors, (175) [2023-03-30 23:45:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 5980 transitions. [2023-03-30 23:45:43,903 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 5980 transitions. Word has length 89 [2023-03-30 23:45:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:43,904 INFO L495 AbstractCegarLoop]: Abstraction has 4345 states and 5980 transitions. [2023-03-30 23:45:43,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 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 23:45:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 5980 transitions. [2023-03-30 23:45:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-03-30 23:45:43,916 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:43,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:45:43,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:43,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash -409696058, now seen corresponding path program 1 times [2023-03-30 23:45:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:43,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898068517] [2023-03-30 23:45:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:45:44,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898068517] [2023-03-30 23:45:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898068517] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191195047] [2023-03-30 23:45:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:44,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:44,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:44,272 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 23:45:44,278 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 23:45:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:44,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:44,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:45:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:44,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191195047] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:45:44,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:45:44,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:45:44,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017314753] [2023-03-30 23:45:44,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:45:44,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:45:44,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:44,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:45:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:45:44,846 INFO L87 Difference]: Start difference. First operand 4345 states and 5980 transitions. Second operand has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:45:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:51,385 INFO L93 Difference]: Finished difference Result 14716 states and 20304 transitions. [2023-03-30 23:45:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:45:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 215 [2023-03-30 23:45:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:51,411 INFO L225 Difference]: With dead ends: 14716 [2023-03-30 23:45:51,411 INFO L226 Difference]: Without dead ends: 8832 [2023-03-30 23:45:51,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 434 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:45:51,422 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3754 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 12035 mSolverCounterSat, 1946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 13981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1946 IncrementalHoareTripleChecker+Valid, 12035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:51,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3757 Valid, 208 Invalid, 13981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1946 Valid, 12035 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-03-30 23:45:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8832 states. [2023-03-30 23:45:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8832 to 7297. [2023-03-30 23:45:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7297 states, 7129 states have (on average 1.1161453219245336) internal successors, (7957), 7172 states have internal predecessors, (7957), 32 states have call successors, (32), 32 states have call predecessors, (32), 135 states have return successors, (343), 92 states have call predecessors, (343), 31 states have call successors, (343) [2023-03-30 23:45:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 8332 transitions. [2023-03-30 23:45:51,562 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 8332 transitions. Word has length 215 [2023-03-30 23:45:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:51,563 INFO L495 AbstractCegarLoop]: Abstraction has 7297 states and 8332 transitions. [2023-03-30 23:45:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:45:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 8332 transitions. [2023-03-30 23:45:51,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-03-30 23:45:51,565 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:51,565 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 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] [2023-03-30 23:45:51,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:45:51,770 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 23:45:51,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:51,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2028004465, now seen corresponding path program 1 times [2023-03-30 23:45:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226768176] [2023-03-30 23:45:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:51,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:52,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-03-30 23:45:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226768176] [2023-03-30 23:45:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226768176] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871027848] [2023-03-30 23:45:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:52,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:52,065 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 23:45:52,066 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 23:45:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:52,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:52,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-03-30 23:45:52,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871027848] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:52,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:52,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:45:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639382777] [2023-03-30 23:45:52,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:52,201 INFO L87 Difference]: Start difference. First operand 7297 states and 8332 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 23:45:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:53,531 INFO L93 Difference]: Finished difference Result 14588 states and 16658 transitions. [2023-03-30 23:45:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 248 [2023-03-30 23:45:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:53,554 INFO L225 Difference]: With dead ends: 14588 [2023-03-30 23:45:53,554 INFO L226 Difference]: Without dead ends: 7297 [2023-03-30 23:45:53,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:53,568 INFO L413 NwaCegarLoop]: 918 mSDtfsCounter, 755 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:53,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 944 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 23:45:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2023-03-30 23:45:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 7289. [2023-03-30 23:45:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7124 states have (on average 1.0765019651880965) internal successors, (7669), 7166 states have internal predecessors, (7669), 32 states have call successors, (32), 32 states have call predecessors, (32), 132 states have return successors, (244), 90 states have call predecessors, (244), 31 states have call successors, (244) [2023-03-30 23:45:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 7945 transitions. [2023-03-30 23:45:53,687 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 7945 transitions. Word has length 248 [2023-03-30 23:45:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:53,687 INFO L495 AbstractCegarLoop]: Abstraction has 7289 states and 7945 transitions. [2023-03-30 23:45:53,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 23:45:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 7945 transitions. [2023-03-30 23:45:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-03-30 23:45:53,692 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:53,692 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:45:53,713 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 23:45:53,898 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 23:45:53,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:53,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1576556911, now seen corresponding path program 1 times [2023-03-30 23:45:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:53,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791617719] [2023-03-30 23:45:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:54,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:54,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:54,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:45:54,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:54,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791617719] [2023-03-30 23:45:54,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791617719] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:54,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110619549] [2023-03-30 23:45:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:54,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:54,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:54,111 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 23:45:54,133 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 23:45:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:54,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:54,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:45:54,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110619549] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:54,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:54,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:45:54,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580440835] [2023-03-30 23:45:54,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:54,258 INFO L87 Difference]: Start difference. First operand 7289 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 23:45:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:55,736 INFO L93 Difference]: Finished difference Result 18850 states and 20880 transitions. [2023-03-30 23:45:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 317 [2023-03-30 23:45:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:55,763 INFO L225 Difference]: With dead ends: 18850 [2023-03-30 23:45:55,763 INFO L226 Difference]: Without dead ends: 11567 [2023-03-30 23:45:55,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:55,777 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 705 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:55,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 282 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:45:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11567 states. [2023-03-30 23:45:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11567 to 10865. [2023-03-30 23:45:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10865 states, 10644 states have (on average 1.0697106350995866) internal successors, (11386), 10698 states have internal predecessors, (11386), 47 states have call successors, (47), 47 states have call predecessors, (47), 173 states have return successors, (445), 119 states have call predecessors, (445), 46 states have call successors, (445) [2023-03-30 23:45:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10865 states to 10865 states and 11878 transitions. [2023-03-30 23:45:55,969 INFO L78 Accepts]: Start accepts. Automaton has 10865 states and 11878 transitions. Word has length 317 [2023-03-30 23:45:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:55,969 INFO L495 AbstractCegarLoop]: Abstraction has 10865 states and 11878 transitions. [2023-03-30 23:45:55,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 23:45:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10865 states and 11878 transitions. [2023-03-30 23:45:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-03-30 23:45:55,973 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:55,973 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 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 23:45:55,993 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 23:45:56,178 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 23:45:56,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:56,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1075603724, now seen corresponding path program 1 times [2023-03-30 23:45:56,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:56,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339826177] [2023-03-30 23:45:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:56,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:45:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339826177] [2023-03-30 23:45:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339826177] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668242893] [2023-03-30 23:45:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:56,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:56,642 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 23:45:56,644 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 23:45:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:56,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:45:56,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:56,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668242893] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:56,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:56,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-30 23:45:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929730776] [2023-03-30 23:45:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:45:56,773 INFO L87 Difference]: Start difference. First operand 10865 states and 11878 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 23:45:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:58,270 INFO L93 Difference]: Finished difference Result 25997 states and 28758 transitions. [2023-03-30 23:45:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:58,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 336 [2023-03-30 23:45:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:58,299 INFO L225 Difference]: With dead ends: 25997 [2023-03-30 23:45:58,299 INFO L226 Difference]: Without dead ends: 15138 [2023-03-30 23:45:58,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:45:58,316 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 718 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:58,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 194 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:45:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2023-03-30 23:45:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 13727. [2023-03-30 23:45:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13727 states, 13461 states have (on average 1.0728029121164846) internal successors, (14441), 13524 states have internal predecessors, (14441), 59 states have call successors, (59), 59 states have call predecessors, (59), 206 states have return successors, (651), 143 states have call predecessors, (651), 58 states have call successors, (651) [2023-03-30 23:45:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13727 states to 13727 states and 15151 transitions. [2023-03-30 23:45:58,543 INFO L78 Accepts]: Start accepts. Automaton has 13727 states and 15151 transitions. Word has length 336 [2023-03-30 23:45:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:58,543 INFO L495 AbstractCegarLoop]: Abstraction has 13727 states and 15151 transitions. [2023-03-30 23:45:58,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 23:45:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13727 states and 15151 transitions. [2023-03-30 23:45:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-03-30 23:45:58,548 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:58,548 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:58,555 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 23:45:58,755 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 23:45:58,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:58,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1425043352, now seen corresponding path program 1 times [2023-03-30 23:45:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:58,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626575034] [2023-03-30 23:45:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:58,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:58,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:58,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:58,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:45:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626575034] [2023-03-30 23:45:59,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626575034] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423811975] [2023-03-30 23:45:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:59,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:59,014 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 23:45:59,041 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 23:45:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:59,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:59,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:45:59,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:59,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423811975] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:59,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:59,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:45:59,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353576637] [2023-03-30 23:45:59,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:59,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:59,166 INFO L87 Difference]: Start difference. First operand 13727 states and 15151 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 23:46:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:00,930 INFO L93 Difference]: Finished difference Result 39532 states and 44396 transitions. [2023-03-30 23:46:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 398 [2023-03-30 23:46:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:00,988 INFO L225 Difference]: With dead ends: 39532 [2023-03-30 23:46:00,989 INFO L226 Difference]: Without dead ends: 25811 [2023-03-30 23:46:01,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 406 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 23:46:01,016 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 692 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:01,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1007 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:46:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25811 states. [2023-03-30 23:46:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25811 to 24407. [2023-03-30 23:46:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 23991 states have (on average 1.0591471801925723) internal successors, (25410), 24084 states have internal predecessors, (25410), 104 states have call successors, (104), 104 states have call predecessors, (104), 311 states have return successors, (1391), 218 states have call predecessors, (1391), 103 states have call successors, (1391) [2023-03-30 23:46:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 26905 transitions. [2023-03-30 23:46:01,310 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 26905 transitions. Word has length 398 [2023-03-30 23:46:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:01,310 INFO L495 AbstractCegarLoop]: Abstraction has 24407 states and 26905 transitions. [2023-03-30 23:46:01,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 23:46:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 26905 transitions. [2023-03-30 23:46:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-03-30 23:46:01,386 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:01,386 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2023-03-30 23:46:01,393 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 23:46:01,586 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 23:46:01,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:01,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:01,587 INFO L85 PathProgramCache]: Analyzing trace with hash 535796618, now seen corresponding path program 1 times [2023-03-30 23:46:01,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:01,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577835361] [2023-03-30 23:46:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:01,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:01,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:01,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:01,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2023-03-30 23:46:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 333 proven. 11 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-03-30 23:46:01,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577835361] [2023-03-30 23:46:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577835361] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066990170] [2023-03-30 23:46:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:01,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:01,954 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 23:46:01,981 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 23:46:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:02,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 339 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:46:02,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 339 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:46:02,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066990170] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:02,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:02,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-03-30 23:46:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100712390] [2023-03-30 23:46:02,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:46:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:46:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:46:02,527 INFO L87 Difference]: Start difference. First operand 24407 states and 26905 transitions. Second operand has 13 states, 13 states have (on average 35.38461538461539) internal successors, (460), 11 states have internal predecessors, (460), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:46:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:05,914 INFO L93 Difference]: Finished difference Result 52496 states and 58062 transitions. [2023-03-30 23:46:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:46:05,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 35.38461538461539) internal successors, (460), 11 states have internal predecessors, (460), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 425 [2023-03-30 23:46:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:05,968 INFO L225 Difference]: With dead ends: 52496 [2023-03-30 23:46:05,968 INFO L226 Difference]: Without dead ends: 28095 [2023-03-30 23:46:05,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 860 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-03-30 23:46:05,999 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5190 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 5049 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5190 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 5826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 5049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:05,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5190 Valid, 145 Invalid, 5826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 5049 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-30 23:46:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2023-03-30 23:46:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 28069. [2023-03-30 23:46:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28069 states, 27562 states have (on average 1.047456643204412) internal successors, (28870), 27686 states have internal predecessors, (28870), 119 states have call successors, (119), 119 states have call predecessors, (119), 387 states have return successors, (1459), 263 states have call predecessors, (1459), 118 states have call successors, (1459) [2023-03-30 23:46:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28069 states to 28069 states and 30448 transitions. [2023-03-30 23:46:06,387 INFO L78 Accepts]: Start accepts. Automaton has 28069 states and 30448 transitions. Word has length 425 [2023-03-30 23:46:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:06,389 INFO L495 AbstractCegarLoop]: Abstraction has 28069 states and 30448 transitions. [2023-03-30 23:46:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 35.38461538461539) internal successors, (460), 11 states have internal predecessors, (460), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:46:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 28069 states and 30448 transitions. [2023-03-30 23:46:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-03-30 23:46:06,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:06,398 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:06,407 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 23:46:06,604 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 23:46:06,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:06,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 112829240, now seen corresponding path program 1 times [2023-03-30 23:46:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:06,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930611417] [2023-03-30 23:46:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:06,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:06,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2023-03-30 23:46:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 162 proven. 93 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-03-30 23:46:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930611417] [2023-03-30 23:46:07,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930611417] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459521443] [2023-03-30 23:46:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:07,081 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 23:46:07,084 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 23:46:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:07,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 333 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 23:46:07,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 163 proven. 94 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-03-30 23:46:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459521443] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:07,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:07,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:46:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656680668] [2023-03-30 23:46:07,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:07,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:46:07,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:46:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:07,977 INFO L87 Difference]: Start difference. First operand 28069 states and 30448 transitions. Second operand has 12 states, 12 states have (on average 70.58333333333333) internal successors, (847), 10 states have internal predecessors, (847), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:46:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:13,674 INFO L93 Difference]: Finished difference Result 90393 states and 100867 transitions. [2023-03-30 23:46:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:46:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 70.58333333333333) internal successors, (847), 10 states have internal predecessors, (847), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 446 [2023-03-30 23:46:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:13,797 INFO L225 Difference]: With dead ends: 90393 [2023-03-30 23:46:13,797 INFO L226 Difference]: Without dead ends: 62330 [2023-03-30 23:46:13,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 907 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:46:13,823 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 5039 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 9852 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5039 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 10952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 9852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:13,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5039 Valid, 217 Invalid, 10952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 9852 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-03-30 23:46:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62330 states. [2023-03-30 23:46:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62330 to 57406. [2023-03-30 23:46:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57406 states, 56423 states have (on average 1.0494301969055173) internal successors, (59212), 56682 states have internal predecessors, (59212), 242 states have call successors, (242), 242 states have call predecessors, (242), 740 states have return successors, (4347), 481 states have call predecessors, (4347), 241 states have call successors, (4347) [2023-03-30 23:46:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57406 states to 57406 states and 63801 transitions. [2023-03-30 23:46:14,705 INFO L78 Accepts]: Start accepts. Automaton has 57406 states and 63801 transitions. Word has length 446 [2023-03-30 23:46:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:14,706 INFO L495 AbstractCegarLoop]: Abstraction has 57406 states and 63801 transitions. [2023-03-30 23:46:14,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.58333333333333) internal successors, (847), 10 states have internal predecessors, (847), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:46:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 57406 states and 63801 transitions. [2023-03-30 23:46:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-03-30 23:46:14,710 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:14,710 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:14,722 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 23:46:14,916 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 23:46:14,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:14,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1898994233, now seen corresponding path program 1 times [2023-03-30 23:46:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:14,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078954582] [2023-03-30 23:46:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:46:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2023-03-30 23:46:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-03-30 23:46:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078954582] [2023-03-30 23:46:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078954582] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966221799] [2023-03-30 23:46:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:15,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:15,720 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 23:46:15,722 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 23:46:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:15,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:15,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-03-30 23:46:15,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966221799] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:15,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:15,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-03-30 23:46:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348291967] [2023-03-30 23:46:15,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:15,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:15,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:46:15,896 INFO L87 Difference]: Start difference. First operand 57406 states and 63801 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-30 23:46:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:17,504 INFO L93 Difference]: Finished difference Result 114806 states and 127596 transitions. [2023-03-30 23:46:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 525 [2023-03-30 23:46:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:17,805 INFO L225 Difference]: With dead ends: 114806 [2023-03-30 23:46:17,805 INFO L226 Difference]: Without dead ends: 57406 [2023-03-30 23:46:17,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:46:17,983 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 793 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:17,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 791 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 23:46:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57406 states. [2023-03-30 23:46:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57406 to 57406. [2023-03-30 23:46:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57406 states, 56423 states have (on average 1.0434929018308137) internal successors, (58877), 56682 states have internal predecessors, (58877), 242 states have call successors, (242), 242 states have call predecessors, (242), 740 states have return successors, (3857), 481 states have call predecessors, (3857), 241 states have call successors, (3857) [2023-03-30 23:46:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57406 states to 57406 states and 62976 transitions. [2023-03-30 23:46:18,916 INFO L78 Accepts]: Start accepts. Automaton has 57406 states and 62976 transitions. Word has length 525 [2023-03-30 23:46:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:18,917 INFO L495 AbstractCegarLoop]: Abstraction has 57406 states and 62976 transitions. [2023-03-30 23:46:18,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-30 23:46:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 57406 states and 62976 transitions. [2023-03-30 23:46:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2023-03-30 23:46:18,936 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:18,936 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:18,942 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 23:46:19,142 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 23:46:19,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:19,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1287128504, now seen corresponding path program 1 times [2023-03-30 23:46:19,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:19,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975671832] [2023-03-30 23:46:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:46:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2023-03-30 23:46:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-03-30 23:46:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2023-03-30 23:46:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 445 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-03-30 23:46:19,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975671832] [2023-03-30 23:46:19,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975671832] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254778447] [2023-03-30 23:46:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:19,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:19,875 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 23:46:19,875 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 23:46:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:20,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:20,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 448 proven. 2 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-03-30 23:46:20,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 448 proven. 2 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-03-30 23:46:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254778447] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:20,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:20,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:46:20,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813338282] [2023-03-30 23:46:20,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:46:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:46:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:46:20,637 INFO L87 Difference]: Start difference. First operand 57406 states and 62976 transitions. Second operand has 11 states, 11 states have (on average 81.81818181818181) internal successors, (900), 9 states have internal predecessors, (900), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:46:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:27,208 INFO L93 Difference]: Finished difference Result 120582 states and 132362 transitions. [2023-03-30 23:46:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:46:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 81.81818181818181) internal successors, (900), 9 states have internal predecessors, (900), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 719 [2023-03-30 23:46:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:27,333 INFO L225 Difference]: With dead ends: 120582 [2023-03-30 23:46:27,333 INFO L226 Difference]: Without dead ends: 60332 [2023-03-30 23:46:27,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1457 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-03-30 23:46:27,385 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 3016 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 13065 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3020 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 13779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 13065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:27,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3020 Valid, 236 Invalid, 13779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 13065 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-03-30 23:46:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60332 states. [2023-03-30 23:46:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60332 to 54625. [2023-03-30 23:46:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54625 states, 53653 states have (on average 1.0291689187929844) internal successors, (55218), 53924 states have internal predecessors, (55218), 230 states have call successors, (230), 230 states have call predecessors, (230), 741 states have return successors, (2613), 470 states have call predecessors, (2613), 229 states have call successors, (2613) [2023-03-30 23:46:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54625 states to 54625 states and 58061 transitions. [2023-03-30 23:46:28,354 INFO L78 Accepts]: Start accepts. Automaton has 54625 states and 58061 transitions. Word has length 719 [2023-03-30 23:46:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:28,354 INFO L495 AbstractCegarLoop]: Abstraction has 54625 states and 58061 transitions. [2023-03-30 23:46:28,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.81818181818181) internal successors, (900), 9 states have internal predecessors, (900), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:46:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 54625 states and 58061 transitions. [2023-03-30 23:46:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-03-30 23:46:28,369 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:28,378 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:28,385 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 23:46:28,578 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 23:46:28,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:28,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -23368529, now seen corresponding path program 1 times [2023-03-30 23:46:28,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:28,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741815557] [2023-03-30 23:46:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:28,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms