/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/Problem13_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:48:43,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:48:43,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:48:43,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:48:43,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:48:43,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:48:43,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:48:43,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:48:43,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:48:43,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:48:43,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:48:43,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:48:43,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:48:43,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:48:43,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:48:43,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:48:43,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 22:48:43,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:48:43,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:48:43,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:48:43,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:48:43,177 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:48:43,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:48:43,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:48:43,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:48:43,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:48:43,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:48:43,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:48:43,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:48:43,179 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:48:43,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:48:43,180 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:48:43,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:48:43,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:48:43,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:48:43,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:48:43,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:48:43,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:48:43,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:48:43,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:48:43,183 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:48:43,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:48:43,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:48:43,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:48:43,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:48:43,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:48:43,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:48:43,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:48:43,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:48:43,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:48:43,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:48:43,185 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:48:43,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:48:43,186 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:48:43,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:48:43,186 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:48:43,186 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:48:43,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:48:43,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:48:43,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:48:43,468 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:48:43,468 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:48:43,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2023-04-01 22:48:44,618 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:48:45,111 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:48:45,112 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2023-04-01 22:48:45,142 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb67e218/dc4d05bd55534fafbb565e696319abe1/FLAGcd6b1618c [2023-04-01 22:48:45,157 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb67e218/dc4d05bd55534fafbb565e696319abe1 [2023-04-01 22:48:45,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:48:45,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:48:45,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:48:45,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:48:45,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:48:45,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:48:45" (1/1) ... [2023-04-01 22:48:45,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796313e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:45, skipping insertion in model container [2023-04-01 22:48:45,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:48:45" (1/1) ... [2023-04-01 22:48:45,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:48:45,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:48:45,503 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/Problem13_label54.c[4044,4057] [2023-04-01 22:48:46,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:48:46,338 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:48:46,362 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/Problem13_label54.c[4044,4057] [2023-04-01 22:48:46,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:48:46,799 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:48:46,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46 WrapperNode [2023-04-01 22:48:46,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:48:46,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:48:46,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:48:46,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:48:46,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:46,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:46,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:46,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:46,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:47,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:47,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:47,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:47,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:48:47,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:48:47,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:48:47,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:48:47,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (1/1) ... [2023-04-01 22:48:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:48:47,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:47,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:48:47,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:48:47,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:48:47,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:48:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:48:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:48:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:48:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:48:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:48:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:48:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:48:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:48:47,279 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:48:47,281 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:48:52,067 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:48:52,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:48:52,080 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:48:52,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:48:52 BoogieIcfgContainer [2023-04-01 22:48:52,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:48:52,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:48:52,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:48:52,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:48:52,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:48:45" (1/3) ... [2023-04-01 22:48:52,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be44718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:48:52, skipping insertion in model container [2023-04-01 22:48:52,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:46" (2/3) ... [2023-04-01 22:48:52,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be44718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:48:52, skipping insertion in model container [2023-04-01 22:48:52,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:48:52" (3/3) ... [2023-04-01 22:48:52,090 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2023-04-01 22:48:52,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:48:52,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:48:52,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:48:52,170 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;@3f9e024c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:48:52,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:48:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:48:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 22:48:52,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:52,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:52,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:52,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 73473324, now seen corresponding path program 1 times [2023-04-01 22:48:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897810449] [2023-04-01 22:48:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:52,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:48:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897810449] [2023-04-01 22:48:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897810449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:52,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:48:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:48:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867943494] [2023-04-01 22:48:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:52,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:48:52,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:48:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:48:52,711 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:48:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:59,157 INFO L93 Difference]: Finished difference Result 3204 states and 5913 transitions. [2023-04-01 22:48:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:48:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 33 [2023-04-01 22:48:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:59,212 INFO L225 Difference]: With dead ends: 3204 [2023-04-01 22:48:59,212 INFO L226 Difference]: Without dead ends: 2006 [2023-04-01 22:48:59,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:48:59,228 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 2892 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:59,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2892 Valid, 304 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 22:48:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2023-04-01 22:48:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1920. [2023-04-01 22:48:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1896 states have (on average 1.729957805907173) internal successors, (3280), 1897 states have internal predecessors, (3280), 10 states have call successors, (10), 10 states have call predecessors, (10), 13 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2023-04-01 22:48:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 3311 transitions. [2023-04-01 22:48:59,392 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 3311 transitions. Word has length 33 [2023-04-01 22:48:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:59,394 INFO L495 AbstractCegarLoop]: Abstraction has 1920 states and 3311 transitions. [2023-04-01 22:48:59,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:48:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 3311 transitions. [2023-04-01 22:48:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 22:48:59,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:59,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:59,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:48:59,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:59,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -157632979, now seen corresponding path program 1 times [2023-04-01 22:48:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:59,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085318812] [2023-04-01 22:48:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:59,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:48:59,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:59,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085318812] [2023-04-01 22:48:59,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085318812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:48:59,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:48:59,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939827160] [2023-04-01 22:48:59,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:59,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:48:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:48:59,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:48:59,922 INFO L87 Difference]: Start difference. First operand 1920 states and 3311 transitions. Second operand has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:08,510 INFO L93 Difference]: Finished difference Result 7220 states and 12706 transitions. [2023-04-01 22:49:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:49:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 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 102 [2023-04-01 22:49:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:08,543 INFO L225 Difference]: With dead ends: 7220 [2023-04-01 22:49:08,544 INFO L226 Difference]: Without dead ends: 5306 [2023-04-01 22:49:08,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:49:08,559 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 5957 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 8451 mSolverCounterSat, 1797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5957 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 10248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1797 IncrementalHoareTripleChecker+Valid, 8451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:08,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5957 Valid, 812 Invalid, 10248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1797 Valid, 8451 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-04-01 22:49:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2023-04-01 22:49:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5282. [2023-04-01 22:49:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5181 states have (on average 1.4589847519783825) internal successors, (7559), 5195 states have internal predecessors, (7559), 26 states have call successors, (26), 26 states have call predecessors, (26), 74 states have return successors, (219), 60 states have call predecessors, (219), 25 states have call successors, (219) [2023-04-01 22:49:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 7804 transitions. [2023-04-01 22:49:08,725 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 7804 transitions. Word has length 102 [2023-04-01 22:49:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:08,725 INFO L495 AbstractCegarLoop]: Abstraction has 5282 states and 7804 transitions. [2023-04-01 22:49:08,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 7804 transitions. [2023-04-01 22:49:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 22:49:08,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:08,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:08,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:49:08,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:08,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -332618415, now seen corresponding path program 1 times [2023-04-01 22:49:08,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:08,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790422189] [2023-04-01 22:49:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:08,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:08,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:49:09,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:09,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790422189] [2023-04-01 22:49:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790422189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:09,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:49:09,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:49:09,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386052267] [2023-04-01 22:49:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:09,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:49:09,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:49:09,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:49:09,096 INFO L87 Difference]: Start difference. First operand 5282 states and 7804 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:15,703 INFO L93 Difference]: Finished difference Result 15889 states and 24278 transitions. [2023-04-01 22:49:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:49:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 4 states have internal predecessors, (98), 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 104 [2023-04-01 22:49:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:15,757 INFO L225 Difference]: With dead ends: 15889 [2023-04-01 22:49:15,757 INFO L226 Difference]: Without dead ends: 10613 [2023-04-01 22:49:15,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:49:15,774 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 4878 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 7051 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4878 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 8039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 7051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:15,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4878 Valid, 808 Invalid, 8039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 7051 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-04-01 22:49:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10613 states. [2023-04-01 22:49:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10613 to 10441. [2023-04-01 22:49:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10441 states, 10176 states have (on average 1.3250786163522013) internal successors, (13484), 10229 states have internal predecessors, (13484), 50 states have call successors, (50), 50 states have call predecessors, (50), 214 states have return successors, (901), 161 states have call predecessors, (901), 49 states have call successors, (901) [2023-04-01 22:49:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10441 states to 10441 states and 14435 transitions. [2023-04-01 22:49:16,059 INFO L78 Accepts]: Start accepts. Automaton has 10441 states and 14435 transitions. Word has length 104 [2023-04-01 22:49:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:16,061 INFO L495 AbstractCegarLoop]: Abstraction has 10441 states and 14435 transitions. [2023-04-01 22:49:16,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10441 states and 14435 transitions. [2023-04-01 22:49:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 22:49:16,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:16,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:49:16,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:16,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2054923139, now seen corresponding path program 1 times [2023-04-01 22:49:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:16,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388553822] [2023-04-01 22:49:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:16,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:16,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:49:16,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388553822] [2023-04-01 22:49:16,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388553822] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:16,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:49:16,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:49:16,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124955374] [2023-04-01 22:49:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:16,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:49:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:16,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:49:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:16,391 INFO L87 Difference]: Start difference. First operand 10441 states and 14435 transitions. Second operand has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:24,413 INFO L93 Difference]: Finished difference Result 39747 states and 59289 transitions. [2023-04-01 22:49:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:49:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 5 states have internal predecessors, (104), 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 110 [2023-04-01 22:49:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:24,536 INFO L225 Difference]: With dead ends: 39747 [2023-04-01 22:49:24,536 INFO L226 Difference]: Without dead ends: 29312 [2023-04-01 22:49:24,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:49:24,573 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 8354 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 7619 mSolverCounterSat, 2162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8354 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 9781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2162 IncrementalHoareTripleChecker+Valid, 7619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:24,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8354 Valid, 765 Invalid, 9781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2162 Valid, 7619 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-04-01 22:49:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29312 states. [2023-04-01 22:49:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29312 to 28383. [2023-04-01 22:49:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28383 states, 27541 states have (on average 1.241639737119204) internal successors, (34196), 27755 states have internal predecessors, (34196), 134 states have call successors, (134), 134 states have call predecessors, (134), 707 states have return successors, (5503), 493 states have call predecessors, (5503), 133 states have call successors, (5503) [2023-04-01 22:49:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28383 states to 28383 states and 39833 transitions. [2023-04-01 22:49:25,458 INFO L78 Accepts]: Start accepts. Automaton has 28383 states and 39833 transitions. Word has length 110 [2023-04-01 22:49:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:25,458 INFO L495 AbstractCegarLoop]: Abstraction has 28383 states and 39833 transitions. [2023-04-01 22:49:25,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 28383 states and 39833 transitions. [2023-04-01 22:49:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 22:49:25,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:25,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:25,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 22:49:25,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:25,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2055394653, now seen corresponding path program 1 times [2023-04-01 22:49:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:25,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429214480] [2023-04-01 22:49:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:25,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:49:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429214480] [2023-04-01 22:49:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429214480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414429057] [2023-04-01 22:49:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:25,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:25,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:49:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:25,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 22:49:25,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:49:26,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:49:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:49:26,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414429057] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:26,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:49:26,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2023-04-01 22:49:26,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402815376] [2023-04-01 22:49:26,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:26,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:49:26,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:49:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:26,436 INFO L87 Difference]: Start difference. First operand 28383 states and 39833 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:30,507 INFO L93 Difference]: Finished difference Result 79907 states and 118870 transitions. [2023-04-01 22:49:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 22:49:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 126 [2023-04-01 22:49:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:30,764 INFO L225 Difference]: With dead ends: 79907 [2023-04-01 22:49:30,764 INFO L226 Difference]: Without dead ends: 51530 [2023-04-01 22:49:30,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:30,842 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 3481 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:30,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3481 Valid, 569 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 22:49:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51530 states. [2023-04-01 22:49:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51530 to 51484. [2023-04-01 22:49:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51484 states, 49928 states have (on average 1.2011496555039256) internal successors, (59971), 50346 states have internal predecessors, (59971), 242 states have call successors, (242), 242 states have call predecessors, (242), 1313 states have return successors, (12979), 895 states have call predecessors, (12979), 241 states have call successors, (12979) [2023-04-01 22:49:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51484 states to 51484 states and 73192 transitions. [2023-04-01 22:49:32,341 INFO L78 Accepts]: Start accepts. Automaton has 51484 states and 73192 transitions. Word has length 126 [2023-04-01 22:49:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:32,342 INFO L495 AbstractCegarLoop]: Abstraction has 51484 states and 73192 transitions. [2023-04-01 22:49:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:49:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 51484 states and 73192 transitions. [2023-04-01 22:49:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-04-01 22:49:32,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:32,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:49:32,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:32,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:32,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:32,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:32,554 INFO L85 PathProgramCache]: Analyzing trace with hash 182772968, now seen corresponding path program 1 times [2023-04-01 22:49:32,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:32,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535679808] [2023-04-01 22:49:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:32,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:33,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:49:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:49:33,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535679808] [2023-04-01 22:49:33,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535679808] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977020505] [2023-04-01 22:49:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:33,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:33,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:33,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:33,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:49:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:33,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:33,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:49:33,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:33,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977020505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:33,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:33,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:49:33,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906120337] [2023-04-01 22:49:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:33,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:33,339 INFO L87 Difference]: Start difference. First operand 51484 states and 73192 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:37,181 INFO L93 Difference]: Finished difference Result 116256 states and 168755 transitions. [2023-04-01 22:49:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:37,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 233 [2023-04-01 22:49:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:37,537 INFO L225 Difference]: With dead ends: 116256 [2023-04-01 22:49:37,537 INFO L226 Difference]: Without dead ends: 64778 [2023-04-01 22:49:37,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:37,618 INFO L413 NwaCegarLoop]: 1893 mSDtfsCounter, 833 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:37,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 2066 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 22:49:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64778 states. [2023-04-01 22:49:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64778 to 64752. [2023-04-01 22:49:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64752 states, 62905 states have (on average 1.1752006994674509) internal successors, (73926), 63396 states have internal predecessors, (73926), 306 states have call successors, (306), 306 states have call predecessors, (306), 1540 states have return successors, (15975), 1049 states have call predecessors, (15975), 305 states have call successors, (15975) [2023-04-01 22:49:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64752 states to 64752 states and 90207 transitions. [2023-04-01 22:49:39,344 INFO L78 Accepts]: Start accepts. Automaton has 64752 states and 90207 transitions. Word has length 233 [2023-04-01 22:49:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:39,345 INFO L495 AbstractCegarLoop]: Abstraction has 64752 states and 90207 transitions. [2023-04-01 22:49:39,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 64752 states and 90207 transitions. [2023-04-01 22:49:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-04-01 22:49:39,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:39,359 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:39,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:39,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 22:49:39,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:39,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1010678338, now seen corresponding path program 1 times [2023-04-01 22:49:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:39,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315024484] [2023-04-01 22:49:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:39,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:39,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:49:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-01 22:49:40,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:40,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315024484] [2023-04-01 22:49:40,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315024484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647967188] [2023-04-01 22:49:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:40,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:40,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:40,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:49:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:40,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:40,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:49:40,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:40,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647967188] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:40,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:40,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:49:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827034227] [2023-04-01 22:49:40,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:40,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:40,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:40,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:40,251 INFO L87 Difference]: Start difference. First operand 64752 states and 90207 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:43,720 INFO L93 Difference]: Finished difference Result 129499 states and 180597 transitions. [2023-04-01 22:49:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:43,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 242 [2023-04-01 22:49:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:43,930 INFO L225 Difference]: With dead ends: 129499 [2023-04-01 22:49:43,930 INFO L226 Difference]: Without dead ends: 64753 [2023-04-01 22:49:44,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:44,195 INFO L413 NwaCegarLoop]: 1399 mSDtfsCounter, 1198 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:44,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1503 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 22:49:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64753 states. [2023-04-01 22:49:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64753 to 60721. [2023-04-01 22:49:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60721 states, 58920 states have (on average 1.1250678886625933) internal successors, (66289), 59409 states have internal predecessors, (66289), 286 states have call successors, (286), 286 states have call predecessors, (286), 1514 states have return successors, (10822), 1025 states have call predecessors, (10822), 285 states have call successors, (10822) [2023-04-01 22:49:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60721 states to 60721 states and 77397 transitions. [2023-04-01 22:49:45,642 INFO L78 Accepts]: Start accepts. Automaton has 60721 states and 77397 transitions. Word has length 242 [2023-04-01 22:49:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:45,642 INFO L495 AbstractCegarLoop]: Abstraction has 60721 states and 77397 transitions. [2023-04-01 22:49:45,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 60721 states and 77397 transitions. [2023-04-01 22:49:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-04-01 22:49:45,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:45,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:49:45,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:45,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:45,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1316903901, now seen corresponding path program 1 times [2023-04-01 22:49:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:45,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733770154] [2023-04-01 22:49:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:46,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:49:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:49:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733770154] [2023-04-01 22:49:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733770154] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861114841] [2023-04-01 22:49:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:46,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:46,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:46,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:49:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:46,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:46,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:49:46,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861114841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:46,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:46,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 22:49:46,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773908351] [2023-04-01 22:49:46,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:46,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:46,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:46,507 INFO L87 Difference]: Start difference. First operand 60721 states and 77397 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:50,410 INFO L93 Difference]: Finished difference Result 136242 states and 177471 transitions. [2023-04-01 22:49:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 255 [2023-04-01 22:49:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:50,593 INFO L225 Difference]: With dead ends: 136242 [2023-04-01 22:49:50,594 INFO L226 Difference]: Without dead ends: 75527 [2023-04-01 22:49:50,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:50,754 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 1006 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 3293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:50,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 885 Invalid, 3293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 22:49:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75527 states. [2023-04-01 22:49:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75527 to 74704. [2023-04-01 22:49:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74704 states, 72637 states have (on average 1.1092693806186928) internal successors, (80574), 73185 states have internal predecessors, (80574), 354 states have call successors, (354), 354 states have call predecessors, (354), 1712 states have return successors, (13139), 1164 states have call predecessors, (13139), 353 states have call successors, (13139) [2023-04-01 22:49:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74704 states to 74704 states and 94067 transitions. [2023-04-01 22:49:51,974 INFO L78 Accepts]: Start accepts. Automaton has 74704 states and 94067 transitions. Word has length 255 [2023-04-01 22:49:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:51,975 INFO L495 AbstractCegarLoop]: Abstraction has 74704 states and 94067 transitions. [2023-04-01 22:49:51,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 74704 states and 94067 transitions. [2023-04-01 22:49:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-01 22:49:51,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:51,986 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:51,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:52,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:52,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:52,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1256925965, now seen corresponding path program 1 times [2023-04-01 22:49:52,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:52,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264075707] [2023-04-01 22:49:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:52,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:53,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:53,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:49:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-04-01 22:49:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 83 proven. 237 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:49:53,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264075707] [2023-04-01 22:49:53,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264075707] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926872423] [2023-04-01 22:49:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:53,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:53,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:53,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:49:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:53,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:53,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:49:53,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:49:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:49:54,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926872423] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:49:54,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:49:54,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-04-01 22:49:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922855604] [2023-04-01 22:49:54,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:49:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:49:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:54,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:49:54,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:49:54,095 INFO L87 Difference]: Start difference. First operand 74704 states and 94067 transitions. Second operand has 15 states, 15 states have (on average 34.333333333333336) internal successors, (515), 13 states have internal predecessors, (515), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:50:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:10,069 INFO L93 Difference]: Finished difference Result 196802 states and 247329 transitions. [2023-04-01 22:50:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 22:50:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 34.333333333333336) internal successors, (515), 13 states have internal predecessors, (515), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 324 [2023-04-01 22:50:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:10,384 INFO L225 Difference]: With dead ends: 196802 [2023-04-01 22:50:10,384 INFO L226 Difference]: Without dead ends: 122104 [2023-04-01 22:50:10,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 728 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3754 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=9229, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 22:50:10,455 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 37623 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 15955 mSolverCounterSat, 4825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37634 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 20780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4825 IncrementalHoareTripleChecker+Valid, 15955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:10,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37634 Valid, 1961 Invalid, 20780 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4825 Valid, 15955 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2023-04-01 22:50:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122104 states. [2023-04-01 22:50:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122104 to 116244. [2023-04-01 22:50:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116244 states, 113488 states have (on average 1.0696108839701113) internal successors, (121388), 114187 states have internal predecessors, (121388), 575 states have call successors, (575), 558 states have call predecessors, (575), 2180 states have return successors, (15207), 1498 states have call predecessors, (15207), 574 states have call successors, (15207) [2023-04-01 22:50:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116244 states to 116244 states and 137170 transitions. [2023-04-01 22:50:12,265 INFO L78 Accepts]: Start accepts. Automaton has 116244 states and 137170 transitions. Word has length 324 [2023-04-01 22:50:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:50:12,266 INFO L495 AbstractCegarLoop]: Abstraction has 116244 states and 137170 transitions. [2023-04-01 22:50:12,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 34.333333333333336) internal successors, (515), 13 states have internal predecessors, (515), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:50:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 116244 states and 137170 transitions. [2023-04-01 22:50:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 22:50:12,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:50:12,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:50:12,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 22:50:12,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:12,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:50:12,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:50:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1835883912, now seen corresponding path program 1 times [2023-04-01 22:50:12,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:50:12,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656974498] [2023-04-01 22:50:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:12,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:50:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:50:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:13,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:50:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:13,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:50:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:50:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:50:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656974498] [2023-04-01 22:50:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656974498] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:50:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667844705] [2023-04-01 22:50:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:13,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:50:13,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:50:13,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:50:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:13,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:50:13,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:50:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 22:50:14,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:50:14,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667844705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:50:14,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:50:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 22:50:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726494468] [2023-04-01 22:50:14,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:50:14,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:50:14,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:50:14,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:50:14,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:50:14,193 INFO L87 Difference]: Start difference. First operand 116244 states and 137170 transitions. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 4 states have internal predecessors, (305), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:50:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:19,416 INFO L93 Difference]: Finished difference Result 239395 states and 282857 transitions. [2023-04-01 22:50:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:50:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 4 states have internal predecessors, (305), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 338 [2023-04-01 22:50:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:19,873 INFO L225 Difference]: With dead ends: 239395 [2023-04-01 22:50:19,874 INFO L226 Difference]: Without dead ends: 123157 [2023-04-01 22:50:19,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:50:19,956 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 2667 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 5990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 5116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:19,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 552 Invalid, 5990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 5116 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 22:50:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123157 states. [2023-04-01 22:50:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123157 to 122165. [2023-04-01 22:50:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122165 states, 119235 states have (on average 1.0669350442403656) internal successors, (127216), 119996 states have internal predecessors, (127216), 604 states have call successors, (604), 586 states have call predecessors, (604), 2325 states have return successors, (16144), 1582 states have call predecessors, (16144), 603 states have call successors, (16144) [2023-04-01 22:50:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122165 states to 122165 states and 143964 transitions. [2023-04-01 22:50:22,151 INFO L78 Accepts]: Start accepts. Automaton has 122165 states and 143964 transitions. Word has length 338 [2023-04-01 22:50:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:50:22,151 INFO L495 AbstractCegarLoop]: Abstraction has 122165 states and 143964 transitions. [2023-04-01 22:50:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 4 states have internal predecessors, (305), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:50:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 122165 states and 143964 transitions. [2023-04-01 22:50:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-04-01 22:50:22,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:50:22,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:50:22,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:50:22,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:22,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:50:22,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:50:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1705255275, now seen corresponding path program 1 times [2023-04-01 22:50:22,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:50:22,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882428959] [2023-04-01 22:50:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:50:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:22,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:50:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:22,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:50:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:23,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:50:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2023-04-01 22:50:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-04-01 22:50:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:50:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882428959] [2023-04-01 22:50:23,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882428959] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:50:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493517429] [2023-04-01 22:50:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:23,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:50:23,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:50:23,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:50:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:23,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:50:23,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:50:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 22:50:24,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:50:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 83 proven. 277 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:50:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493517429] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:50:25,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:50:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2023-04-01 22:50:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965857103] [2023-04-01 22:50:25,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:50:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 22:50:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:50:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 22:50:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:50:25,676 INFO L87 Difference]: Start difference. First operand 122165 states and 143964 transitions. Second operand has 16 states, 16 states have (on average 52.3125) internal successors, (837), 14 states have internal predecessors, (837), 7 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 22:51:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:51:01,488 INFO L93 Difference]: Finished difference Result 467117 states and 568388 transitions. [2023-04-01 22:51:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-04-01 22:51:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 52.3125) internal successors, (837), 14 states have internal predecessors, (837), 7 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 438 [2023-04-01 22:51:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:51:02,588 INFO L225 Difference]: With dead ends: 467117 [2023-04-01 22:51:02,588 INFO L226 Difference]: Without dead ends: 344962 [2023-04-01 22:51:02,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 962 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4746 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2204, Invalid=10006, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 22:51:02,710 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 16344 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 38731 mSolverCounterSat, 5602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16347 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 44333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5602 IncrementalHoareTripleChecker+Valid, 38731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:51:02,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16347 Valid, 2188 Invalid, 44333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5602 Valid, 38731 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2023-04-01 22:51:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344962 states. [2023-04-01 22:51:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344962 to 322129. [2023-04-01 22:51:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322129 states, 316613 states have (on average 1.0550388013126435) internal successors, (334039), 317679 states have internal predecessors, (334039), 1600 states have call successors, (1600), 1574 states have call predecessors, (1600), 3915 states have return successors, (39318), 2875 states have call predecessors, (39318), 1599 states have call successors, (39318) [2023-04-01 22:51:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322129 states to 322129 states and 374957 transitions. [2023-04-01 22:51:09,659 INFO L78 Accepts]: Start accepts. Automaton has 322129 states and 374957 transitions. Word has length 438 [2023-04-01 22:51:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:51:09,659 INFO L495 AbstractCegarLoop]: Abstraction has 322129 states and 374957 transitions. [2023-04-01 22:51:09,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.3125) internal successors, (837), 14 states have internal predecessors, (837), 7 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 22:51:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 322129 states and 374957 transitions. [2023-04-01 22:51:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-04-01 22:51:09,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:51:09,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:51:09,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:51:09,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:51:09,889 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:51:09,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:51:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 340949649, now seen corresponding path program 1 times [2023-04-01 22:51:09,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:51:09,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947149806] [2023-04-01 22:51:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:51:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:51:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:10,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:51:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:10,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:51:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:10,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:51:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:10,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 22:51:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 324 proven. 2 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-04-01 22:51:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:51:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947149806] [2023-04-01 22:51:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947149806] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:51:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476376389] [2023-04-01 22:51:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:51:11,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:51:11,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:51:11,065 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) [2023-04-01 22:51:11,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:51:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:11,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:51:11,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:51:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-01 22:51:11,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:51:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-01 22:51:12,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476376389] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:51:12,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:51:12,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:51:12,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476490614] [2023-04-01 22:51:12,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:51:12,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:51:12,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:51:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:51:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:51:12,072 INFO L87 Difference]: Start difference. First operand 322129 states and 374957 transitions. Second operand has 11 states, 11 states have (on average 66.81818181818181) internal successors, (735), 9 states have internal predecessors, (735), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:51:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:51:22,232 INFO L93 Difference]: Finished difference Result 633305 states and 743379 transitions. [2023-04-01 22:51:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 22:51:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 66.81818181818181) internal successors, (735), 9 states have internal predecessors, (735), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 475 [2023-04-01 22:51:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:51:23,411 INFO L225 Difference]: With dead ends: 633305 [2023-04-01 22:51:23,411 INFO L226 Difference]: Without dead ends: 311985 [2023-04-01 22:51:23,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 959 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:51:23,642 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 7417 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 10494 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7417 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 11440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 10494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:51:23,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7417 Valid, 688 Invalid, 11440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 10494 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 22:51:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311985 states. [2023-04-01 22:51:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311985 to 310526. [2023-04-01 22:51:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310526 states, 305240 states have (on average 1.0485060935657189) internal successors, (320046), 306259 states have internal predecessors, (320046), 1540 states have call successors, (1540), 1518 states have call predecessors, (1540), 3745 states have return successors, (32477), 2748 states have call predecessors, (32477), 1539 states have call successors, (32477) [2023-04-01 22:51:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310526 states to 310526 states and 354063 transitions. [2023-04-01 22:51:29,480 INFO L78 Accepts]: Start accepts. Automaton has 310526 states and 354063 transitions. Word has length 475 [2023-04-01 22:51:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:51:29,481 INFO L495 AbstractCegarLoop]: Abstraction has 310526 states and 354063 transitions. [2023-04-01 22:51:29,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.81818181818181) internal successors, (735), 9 states have internal predecessors, (735), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:51:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 310526 states and 354063 transitions. [2023-04-01 22:51:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-04-01 22:51:29,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:51:29,492 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:51:29,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:51:29,700 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,SelfDestructingSolverStorable11 [2023-04-01 22:51:29,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:51:29,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:51:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash -571663113, now seen corresponding path program 1 times [2023-04-01 22:51:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:51:29,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320274534] [2023-04-01 22:51:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:51:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:51:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:30,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:51:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:51:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:30,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:51:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:31,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 403 [2023-04-01 22:51:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 208 proven. 152 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:51:31,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:51:31,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320274534] [2023-04-01 22:51:31,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320274534] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:51:31,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389499818] [2023-04-01 22:51:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:51:31,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:51:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:51:31,160 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) [2023-04-01 22:51:31,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:51:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:31,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:51:31,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:51:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 22:51:35,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:51:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 83 proven. 280 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:51:41,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389499818] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:51:41,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:51:41,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:51:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740251664] [2023-04-01 22:51:41,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:51:41,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:51:41,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:51:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:51:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:51:41,958 INFO L87 Difference]: Start difference. First operand 310526 states and 354063 transitions. Second operand has 25 states, 25 states have (on average 53.56) internal successors, (1339), 23 states have internal predecessors, (1339), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11)