/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/array-cav19/array_init_nondet_vars.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:38:45,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:38:45,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:38:45,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:38:45,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:38:45,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:38:45,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:38:45,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:38:45,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:38:45,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:38:45,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:38:45,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:38:45,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:38:45,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:38:45,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:38:45,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:38:45,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:38:45,187 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 19:38:45,207 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:38:45,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:38:45,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:38:45,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:38:45,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:38:45,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:38:45,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:38:45,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:38:45,209 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:38:45,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:38:45,210 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:38:45,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:38:45,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:38:45,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:38:45,212 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:38:45,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:38:45,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:38:45,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:38:45,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:38:45,408 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:38:45,408 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:38:45,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-04-01 19:38:46,316 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:38:46,504 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:38:46,504 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-04-01 19:38:46,508 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb4fb8456/5fc7aae55dba4e4d8225091441d1dcfc/FLAGcf1d56fc5 [2023-04-01 19:38:46,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb4fb8456/5fc7aae55dba4e4d8225091441d1dcfc [2023-04-01 19:38:46,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:38:46,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:38:46,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:38:46,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:38:46,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:38:46,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7206311a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46, skipping insertion in model container [2023-04-01 19:38:46,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:38:46,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:38:46,624 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/array-cav19/array_init_nondet_vars.c[413,426] [2023-04-01 19:38:46,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:38:46,639 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:38:46,648 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/array-cav19/array_init_nondet_vars.c[413,426] [2023-04-01 19:38:46,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:38:46,667 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:38:46,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46 WrapperNode [2023-04-01 19:38:46,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:38:46,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:38:46,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:38:46,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:38:46,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:38:46,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:38:46,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:38:46,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:38:46,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (1/1) ... [2023-04-01 19:38:46,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:38:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:38:46,714 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 19:38:46,722 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 19:38:46,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:38:46,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:38:46,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:38:46,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:38:46,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:38:46,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:38:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:38:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:38:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:38:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:38:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:38:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:38:46,785 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:38:46,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:38:46,880 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:38:46,883 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:38:46,883 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 19:38:46,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:38:46 BoogieIcfgContainer [2023-04-01 19:38:46,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:38:46,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:38:46,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:38:46,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:38:46,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:38:46" (1/3) ... [2023-04-01 19:38:46,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f73e090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:38:46, skipping insertion in model container [2023-04-01 19:38:46,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:38:46" (2/3) ... [2023-04-01 19:38:46,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f73e090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:38:46, skipping insertion in model container [2023-04-01 19:38:46,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:38:46" (3/3) ... [2023-04-01 19:38:46,889 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2023-04-01 19:38:46,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:38:46,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:38:46,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:38:46,948 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;@52c3f0ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:38:46,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:38:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 19:38:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 19:38:46,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:38:46,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:38:46,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:38:46,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:38:46,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1812234348, now seen corresponding path program 1 times [2023-04-01 19:38:46,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:38:46,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023103894] [2023-04-01 19:38:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:46,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:38:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:38:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:38:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:38:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:38:47,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:38:47,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023103894] [2023-04-01 19:38:47,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023103894] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:38:47,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:38:47,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:38:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657330476] [2023-04-01 19:38:47,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:38:47,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:38:47,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:38:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:38:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:38:47,212 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:38:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:38:47,293 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2023-04-01 19:38:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:38:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-04-01 19:38:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:38:47,299 INFO L225 Difference]: With dead ends: 61 [2023-04-01 19:38:47,299 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 19:38:47,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:38:47,303 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:38:47,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:38:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 19:38:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 19:38:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:38:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 19:38:47,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2023-04-01 19:38:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:38:47,328 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 19:38:47,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:38:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 19:38:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 19:38:47,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:38:47,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:38:47,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:38:47,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:38:47,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:38:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash 924951024, now seen corresponding path program 1 times [2023-04-01 19:38:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:38:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318409605] [2023-04-01 19:38:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:47,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:38:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:38:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:38:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:38:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:38:47,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:38:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318409605] [2023-04-01 19:38:47,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318409605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:38:47,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:38:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 19:38:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112173792] [2023-04-01 19:38:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:38:47,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 19:38:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:38:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 19:38:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:38:47,447 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 19:38:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:38:47,526 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-04-01 19:38:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 19:38:47,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-04-01 19:38:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:38:47,527 INFO L225 Difference]: With dead ends: 49 [2023-04-01 19:38:47,527 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:38:47,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:38:47,528 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:38:47,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:38:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:38:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 19:38:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:38:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 19:38:47,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-04-01 19:38:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:38:47,536 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 19:38:47,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 19:38:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 19:38:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 19:38:47,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:38:47,537 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 19:38:47,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:38:47,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:38:47,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:38:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1597034047, now seen corresponding path program 1 times [2023-04-01 19:38:47,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:38:47,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036927806] [2023-04-01 19:38:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:38:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:38:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:38:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:38:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:38:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:38:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:38:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036927806] [2023-04-01 19:38:47,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036927806] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:38:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620059090] [2023-04-01 19:38:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:47,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:38:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:38:47,996 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 19:38:48,042 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 19:38:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:48,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 19:38:48,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:38:48,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:38:48,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:38:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:38:48,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:38:48,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:38:48,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:38:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:38:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620059090] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:38:48,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:38:48,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 24 [2023-04-01 19:38:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084104201] [2023-04-01 19:38:48,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:38:48,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 19:38:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:38:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 19:38:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:38:48,475 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 24 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:38:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:38:48,810 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2023-04-01 19:38:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 19:38:48,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-04-01 19:38:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:38:48,811 INFO L225 Difference]: With dead ends: 55 [2023-04-01 19:38:48,811 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 19:38:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 19:38:48,812 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:38:48,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 60 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:38:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 19:38:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2023-04-01 19:38:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:38:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-04-01 19:38:48,819 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 33 [2023-04-01 19:38:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:38:48,819 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-04-01 19:38:48,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:38:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-04-01 19:38:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 19:38:48,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:38:48,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:38:48,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 19:38:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:38:49,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:38:49,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:38:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash -982525171, now seen corresponding path program 1 times [2023-04-01 19:38:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:38:49,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778715850] [2023-04-01 19:38:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:38:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:38:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:38:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:38:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:38:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 19:38:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:38:49,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:38:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778715850] [2023-04-01 19:38:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778715850] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:38:49,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316659552] [2023-04-01 19:38:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:49,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:38:49,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:38:49,173 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 19:38:49,208 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 19:38:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:38:49,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:38:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:38:49,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:38:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:38:49,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316659552] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:38:49,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:38:49,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 19:38:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212330383] [2023-04-01 19:38:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:38:49,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:38:49,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:38:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:38:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:38:49,331 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 19:38:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:38:49,508 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-01 19:38:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 19:38:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 41 [2023-04-01 19:38:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:38:49,509 INFO L225 Difference]: With dead ends: 65 [2023-04-01 19:38:49,509 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 19:38:49,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:38:49,510 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:38:49,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 37 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:38:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 19:38:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2023-04-01 19:38:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 19:38:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-04-01 19:38:49,515 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 41 [2023-04-01 19:38:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:38:49,515 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-04-01 19:38:49,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 19:38:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-04-01 19:38:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 19:38:49,516 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:38:49,516 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:38:49,525 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 19:38:49,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 19:38:49,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:38:49,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:38:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1938670706, now seen corresponding path program 2 times [2023-04-01 19:38:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:38:49,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202203135] [2023-04-01 19:38:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:49,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:38:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:38:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:38:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:38:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:38:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:38:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:38:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:38:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202203135] [2023-04-01 19:38:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202203135] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:38:49,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555380028] [2023-04-01 19:38:49,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:38:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:38:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:38:49,967 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 19:38:49,969 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 19:38:50,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:38:50,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:38:50,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 19:38:50,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:38:50,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:38:50,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:38:50,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:38:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:38:50,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:38:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555380028] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:38:50,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:38:50,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 27 [2023-04-01 19:38:50,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302707661] [2023-04-01 19:38:50,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:38:50,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 19:38:50,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:38:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 19:38:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2023-04-01 19:38:50,506 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 19:38:53,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:38:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:38:53,748 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-04-01 19:38:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:38:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 41 [2023-04-01 19:38:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:38:53,749 INFO L225 Difference]: With dead ends: 82 [2023-04-01 19:38:53,749 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 19:38:53,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 19:38:53,750 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 194 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 90 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 19:38:53,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 83 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 615 Invalid, 2 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 19:38:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 19:38:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2023-04-01 19:38:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 19:38:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-04-01 19:38:53,758 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 41 [2023-04-01 19:38:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:38:53,758 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-04-01 19:38:53,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 19:38:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-04-01 19:38:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 19:38:53,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:38:53,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-04-01 19:38:53,776 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 19:38:53,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:38:53,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:38:53,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:38:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 101878108, now seen corresponding path program 2 times [2023-04-01 19:38:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:38:53,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823941391] [2023-04-01 19:38:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:38:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:38:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:38:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:38:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:38:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:38:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:38:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 19:38:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:38:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:38:54,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:38:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823941391] [2023-04-01 19:38:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823941391] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:38:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409684228] [2023-04-01 19:38:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:38:54,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:38:54,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:38:54,293 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 19:38:54,309 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 19:38:54,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:38:54,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:38:54,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 19:38:54,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:38:54,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 19:38:56,630 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.offset_BEFORE_CALL_6| Int) (|v_main_~#a~0.base_BEFORE_CALL_2| Int) (v_main_~i~0_29 Int)) (and (<= (+ v_main_~i~0_29 2) (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_6| (* v_main_~i~0_29 4)))) (<= v_main_~i~0_29 2))) is different from true [2023-04-01 19:39:02,770 INFO L321 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2023-04-01 19:39:02,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 37 [2023-04-01 19:39:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 2 not checked. [2023-04-01 19:39:02,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:39:02,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409684228] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:39:02,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:39:02,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2023-04-01 19:39:02,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170901356] [2023-04-01 19:39:02,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:39:02,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 19:39:02,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:39:02,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 19:39:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=950, Unknown=2, NotChecked=62, Total=1122 [2023-04-01 19:39:02,908 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 32 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 25 states have internal predecessors, (49), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 19:39:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:39:55,383 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-04-01 19:39:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:39:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 25 states have internal predecessors, (49), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2023-04-01 19:39:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:39:55,385 INFO L225 Difference]: With dead ends: 82 [2023-04-01 19:39:55,385 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 19:39:55,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=385, Invalid=2570, Unknown=19, NotChecked=106, Total=3080 [2023-04-01 19:39:55,387 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:39:55,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 95 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 863 Invalid, 0 Unknown, 67 Unchecked, 1.4s Time] [2023-04-01 19:39:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 19:39:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2023-04-01 19:39:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 19:39:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 19:39:55,411 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 49 [2023-04-01 19:39:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:39:55,412 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 19:39:55,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 25 states have internal predecessors, (49), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 19:39:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 19:39:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 19:39:55,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:39:55,426 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:39:55,433 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 19:39:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:39:55,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:39:55,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:39:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash -918194005, now seen corresponding path program 3 times [2023-04-01 19:39:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:39:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970940698] [2023-04-01 19:39:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:39:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:39:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:39:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:39:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:39:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:56,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:39:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:39:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:56,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:39:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:56,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 19:39:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:39:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 19:39:56,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:39:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970940698] [2023-04-01 19:39:56,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970940698] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:39:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708484194] [2023-04-01 19:39:56,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:39:56,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:39:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:39:56,042 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 19:39:56,043 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 19:39:56,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 19:39:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:39:56,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 19:39:56,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:39:56,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:39:56,393 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:39:56,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:39:56,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:39:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:39:56,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:39:56,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:39:56,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:39:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 19:39:56,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708484194] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:39:56,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:39:56,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 31 [2023-04-01 19:39:56,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576846924] [2023-04-01 19:39:56,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:39:56,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 19:39:56,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:39:56,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 19:39:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2023-04-01 19:39:56,790 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 31 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 23 states have internal predecessors, (61), 12 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2023-04-01 19:39:59,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:39:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:39:59,514 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-04-01 19:39:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 19:39:59,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 23 states have internal predecessors, (61), 12 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 57 [2023-04-01 19:39:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:39:59,515 INFO L225 Difference]: With dead ends: 72 [2023-04-01 19:39:59,515 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 19:39:59,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 19:39:59,517 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:39:59,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 77 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 786 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 19:39:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 19:39:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-04-01 19:39:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 50 states have internal predecessors, (50), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 19:39:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-04-01 19:39:59,527 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 57 [2023-04-01 19:39:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:39:59,527 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-04-01 19:39:59,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 23 states have internal predecessors, (61), 12 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2023-04-01 19:39:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-04-01 19:39:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 19:39:59,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:39:59,528 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:39:59,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 19:39:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:39:59,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:39:59,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:39:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1874339540, now seen corresponding path program 3 times [2023-04-01 19:39:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:39:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733615287] [2023-04-01 19:39:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:39:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:39:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:40:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733615287] [2023-04-01 19:40:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733615287] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114796391] [2023-04-01 19:40:00,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:40:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:00,149 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 19:40:00,206 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 19:40:00,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 19:40:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:00,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 19:40:00,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:00,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:40:00,383 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 19:40:00,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 19:40:00,470 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 19:40:00,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 19:40:00,543 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 19:40:00,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 19:40:00,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 19:40:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:40:00,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:00,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:40:00,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:40:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 19:40:00,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114796391] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:00,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:00,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15] total 29 [2023-04-01 19:40:00,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681433762] [2023-04-01 19:40:00,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 19:40:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 19:40:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-04-01 19:40:00,820 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 22 states have internal predecessors, (52), 9 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 19:40:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:01,339 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2023-04-01 19:40:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 19:40:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 22 states have internal predecessors, (52), 9 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 57 [2023-04-01 19:40:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:01,340 INFO L225 Difference]: With dead ends: 80 [2023-04-01 19:40:01,340 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 19:40:01,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 19:40:01,341 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:01,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 54 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:40:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 19:40:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2023-04-01 19:40:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 19:40:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-04-01 19:40:01,352 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 57 [2023-04-01 19:40:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:01,352 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-04-01 19:40:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 22 states have internal predecessors, (52), 9 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 19:40:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-04-01 19:40:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 19:40:01,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:01,353 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:01,363 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 19:40:01,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:01,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:01,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash -635872903, now seen corresponding path program 4 times [2023-04-01 19:40:01,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:01,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190449148] [2023-04-01 19:40:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 19:40:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:40:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 19:40:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190449148] [2023-04-01 19:40:01,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190449148] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:01,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064958564] [2023-04-01 19:40:01,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:40:01,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:01,981 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 19:40:02,023 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 19:40:02,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:40:02,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:02,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 19:40:02,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:02,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:02,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:40:02,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:40:02,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-04-01 19:40:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 19:40:02,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:02,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:40:02,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:40:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 19:40:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064958564] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:02,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 16] total 39 [2023-04-01 19:40:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653214882] [2023-04-01 19:40:02,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 19:40:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 19:40:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 19:40:02,684 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 30 states have internal predecessors, (77), 17 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 17 states have call predecessors, (20), 15 states have call successors, (20) [2023-04-01 19:40:04,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:06,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:08,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:11,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:13,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:13,587 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2023-04-01 19:40:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 19:40:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 30 states have internal predecessors, (77), 17 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 17 states have call predecessors, (20), 15 states have call successors, (20) Word has length 65 [2023-04-01 19:40:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:13,588 INFO L225 Difference]: With dead ends: 113 [2023-04-01 19:40:13,588 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 19:40:13,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=476, Invalid=3556, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 19:40:13,590 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 172 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 80 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:13,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 87 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1055 Invalid, 5 Unknown, 0 Unchecked, 10.4s Time] [2023-04-01 19:40:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 19:40:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2023-04-01 19:40:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 19:40:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2023-04-01 19:40:13,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 65 [2023-04-01 19:40:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2023-04-01 19:40:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 30 states have internal predecessors, (77), 17 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 17 states have call predecessors, (20), 15 states have call successors, (20) [2023-04-01 19:40:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2023-04-01 19:40:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 19:40:13,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:13,622 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:13,629 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 19:40:13,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:13,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:13,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1742828473, now seen corresponding path program 5 times [2023-04-01 19:40:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:13,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660388911] [2023-04-01 19:40:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 19:40:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:40:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 19:40:13,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660388911] [2023-04-01 19:40:13,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660388911] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024289055] [2023-04-01 19:40:13,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:40:13,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:13,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:13,954 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 19:40:13,956 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 19:40:14,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-01 19:40:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:14,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 19:40:14,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 19:40:14,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 19:40:14,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024289055] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:14,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:14,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-04-01 19:40:14,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856548859] [2023-04-01 19:40:14,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:14,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 19:40:14,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 19:40:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:40:14,185 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 13 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-04-01 19:40:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:14,420 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2023-04-01 19:40:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 19:40:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 13 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 73 [2023-04-01 19:40:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:14,421 INFO L225 Difference]: With dead ends: 109 [2023-04-01 19:40:14,421 INFO L226 Difference]: Without dead ends: 81 [2023-04-01 19:40:14,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2023-04-01 19:40:14,421 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:14,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 37 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-01 19:40:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2023-04-01 19:40:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 50 states have internal predecessors, (50), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 19:40:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-04-01 19:40:14,434 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 73 [2023-04-01 19:40:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:14,434 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-04-01 19:40:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 13 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-04-01 19:40:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-04-01 19:40:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 19:40:14,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:14,435 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:14,451 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 19:40:14,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 19:40:14,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:14,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1945750216, now seen corresponding path program 6 times [2023-04-01 19:40:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7909271] [2023-04-01 19:40:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:40:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:40:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7909271] [2023-04-01 19:40:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7909271] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788655507] [2023-04-01 19:40:15,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:40:15,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:15,101 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 19:40:15,102 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 19:40:15,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-01 19:40:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:15,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 19:40:15,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:15,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:40:15,435 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 19:40:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 19:40:15,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 19:40:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 61 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 19:40:15,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788655507] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:15,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:40:15,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 34 [2023-04-01 19:40:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174806890] [2023-04-01 19:40:15,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 19:40:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 19:40:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 19:40:15,979 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 34 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 27 states have internal predecessors, (70), 16 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2023-04-01 19:40:18,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:20,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:20,990 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-04-01 19:40:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:40:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 27 states have internal predecessors, (70), 16 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) Word has length 73 [2023-04-01 19:40:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:21,004 INFO L225 Difference]: With dead ends: 81 [2023-04-01 19:40:21,004 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 19:40:21,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=3045, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 19:40:21,005 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 115 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:21,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1321 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 19:40:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 19:40:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-04-01 19:40:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 19:40:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-04-01 19:40:21,015 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 73 [2023-04-01 19:40:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:21,015 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-04-01 19:40:21,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 27 states have internal predecessors, (70), 16 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2023-04-01 19:40:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-04-01 19:40:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 19:40:21,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:21,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:21,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 19:40:21,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:21,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:21,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1209810582, now seen corresponding path program 7 times [2023-04-01 19:40:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771664003] [2023-04-01 19:40:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:40:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:40:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 19:40:21,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:21,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771664003] [2023-04-01 19:40:21,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771664003] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:21,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199918000] [2023-04-01 19:40:21,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:40:21,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:21,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:40:21,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:40:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:21,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 19:40:21,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:21,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:22,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:40:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 19:40:22,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:22,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:40:22,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:40:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 19:40:22,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199918000] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:22,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:22,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 18] total 42 [2023-04-01 19:40:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504819145] [2023-04-01 19:40:22,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 19:40:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 19:40:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 19:40:22,447 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 42 states, 38 states have (on average 2.236842105263158) internal successors, (85), 34 states have internal predecessors, (85), 20 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) [2023-04-01 19:40:24,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:26,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:28,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:30,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:33,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:35,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:35,562 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2023-04-01 19:40:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 19:40:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 2.236842105263158) internal successors, (85), 34 states have internal predecessors, (85), 20 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) Word has length 81 [2023-04-01 19:40:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:35,563 INFO L225 Difference]: With dead ends: 137 [2023-04-01 19:40:35,563 INFO L226 Difference]: Without dead ends: 135 [2023-04-01 19:40:35,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=511, Invalid=4319, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 19:40:35,564 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 167 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 86 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:35,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 109 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1609 Invalid, 6 Unknown, 0 Unchecked, 12.6s Time] [2023-04-01 19:40:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-01 19:40:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2023-04-01 19:40:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 19:40:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2023-04-01 19:40:35,586 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 81 [2023-04-01 19:40:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:35,586 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2023-04-01 19:40:35,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 2.236842105263158) internal successors, (85), 34 states have internal predecessors, (85), 20 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) [2023-04-01 19:40:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2023-04-01 19:40:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 19:40:35,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:35,587 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:35,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:35,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 19:40:35,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:35,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:35,792 INFO L85 PathProgramCache]: Analyzing trace with hash -416480156, now seen corresponding path program 8 times [2023-04-01 19:40:35,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:35,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236204086] [2023-04-01 19:40:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:35,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:40:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:40:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:40:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 19:40:35,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:35,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236204086] [2023-04-01 19:40:35,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236204086] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:35,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134476859] [2023-04-01 19:40:35,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:40:35,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:35,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:40:35,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:40:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:40:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:36,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:40:36,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 19:40:36,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 19:40:36,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134476859] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:36,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:36,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2023-04-01 19:40:36,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618638711] [2023-04-01 19:40:36,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:36,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 19:40:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 19:40:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-04-01 19:40:36,240 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2023-04-01 19:40:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:36,527 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2023-04-01 19:40:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:40:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 89 [2023-04-01 19:40:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:36,528 INFO L225 Difference]: With dead ends: 129 [2023-04-01 19:40:36,528 INFO L226 Difference]: Without dead ends: 97 [2023-04-01 19:40:36,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 184 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:40:36,529 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:36,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 42 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:40:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-01 19:40:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2023-04-01 19:40:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 62 states have internal predecessors, (62), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 19:40:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-04-01 19:40:36,544 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 89 [2023-04-01 19:40:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:36,544 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-04-01 19:40:36,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2023-04-01 19:40:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-04-01 19:40:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 19:40:36,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:36,545 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:36,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:40:36,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:36,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash 23474661, now seen corresponding path program 9 times [2023-04-01 19:40:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:36,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590140771] [2023-04-01 19:40:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:40:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:40:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:40:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 19:40:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590140771] [2023-04-01 19:40:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590140771] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883386938] [2023-04-01 19:40:37,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:40:37,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:37,221 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:40:37,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:40:37,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 19:40:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:37,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 19:40:37,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:37,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:40:39,771 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:40:39,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:40:40,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:40:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 33 proven. 84 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 19:40:40,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:40,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:40:40,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:40:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 19:40:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883386938] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:40,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:40,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 39 [2023-04-01 19:40:40,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047005373] [2023-04-01 19:40:40,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:40,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 19:40:40,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 19:40:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1349, Unknown=1, NotChecked=0, Total=1482 [2023-04-01 19:40:40,596 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 39 states, 36 states have (on average 2.361111111111111) internal successors, (85), 31 states have internal predecessors, (85), 20 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2023-04-01 19:40:42,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:44,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:46,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:47,766 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2023-04-01 19:40:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 19:40:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.361111111111111) internal successors, (85), 31 states have internal predecessors, (85), 20 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) Word has length 89 [2023-04-01 19:40:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:47,767 INFO L225 Difference]: With dead ends: 97 [2023-04-01 19:40:47,767 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 19:40:47,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 170 SyntacticMatches, 14 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=364, Invalid=3295, Unknown=1, NotChecked=0, Total=3660 [2023-04-01 19:40:47,768 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 112 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:47,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 85 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1519 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 19:40:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 19:40:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-04-01 19:40:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 68 states have internal predecessors, (68), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 19:40:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2023-04-01 19:40:47,786 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 89 [2023-04-01 19:40:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:47,786 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2023-04-01 19:40:47,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.361111111111111) internal successors, (85), 31 states have internal predecessors, (85), 20 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2023-04-01 19:40:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2023-04-01 19:40:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 19:40:47,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:47,787 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:47,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 19:40:47,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:47,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash -34457421, now seen corresponding path program 10 times [2023-04-01 19:40:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:47,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554546668] [2023-04-01 19:40:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:47,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:40:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:40:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:40:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:40:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 19:40:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554546668] [2023-04-01 19:40:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554546668] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698574585] [2023-04-01 19:40:48,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:40:48,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:48,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:40:48,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:40:48,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:40:48,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:48,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 19:40:48,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:48,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:49,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:40:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 19:40:49,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:49,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:40:49,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:40:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 19:40:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698574585] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:49,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 20] total 44 [2023-04-01 19:40:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906017682] [2023-04-01 19:40:49,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 19:40:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 19:40:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1732, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 19:40:49,530 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 44 states, 41 states have (on average 2.341463414634146) internal successors, (96), 37 states have internal predecessors, (96), 23 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-04-01 19:40:51,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:54,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:56,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:58,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:59,312 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2023-04-01 19:40:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 19:40:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.341463414634146) internal successors, (96), 37 states have internal predecessors, (96), 23 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) Word has length 97 [2023-04-01 19:40:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:59,313 INFO L225 Difference]: With dead ends: 161 [2023-04-01 19:40:59,313 INFO L226 Difference]: Without dead ends: 159 [2023-04-01 19:40:59,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 187 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=562, Invalid=4988, Unknown=0, NotChecked=0, Total=5550 [2023-04-01 19:40:59,315 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 184 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 101 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:59,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 121 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2100 Invalid, 4 Unknown, 0 Unchecked, 9.2s Time] [2023-04-01 19:40:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-04-01 19:40:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 110. [2023-04-01 19:40:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 81 states have internal predecessors, (82), 17 states have call successors, (17), 14 states have call predecessors, (17), 13 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 19:40:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2023-04-01 19:40:59,330 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 97 [2023-04-01 19:40:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:59,330 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2023-04-01 19:40:59,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.341463414634146) internal successors, (96), 37 states have internal predecessors, (96), 23 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-04-01 19:40:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2023-04-01 19:40:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 19:40:59,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:59,331 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:59,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-01 19:40:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 19:40:59,533 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:59,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1742106239, now seen corresponding path program 11 times [2023-04-01 19:40:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199580674] [2023-04-01 19:40:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:40:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:40:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:40:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:40:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:40:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:40:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:40:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:40:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:40:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:40:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:40:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 43 proven. 62 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 19:40:59,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:59,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199580674] [2023-04-01 19:40:59,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199580674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:59,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282015903] [2023-04-01 19:40:59,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:40:59,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:59,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:40:59,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 19:40:59,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-04-01 19:40:59,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:59,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 19:40:59,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 19:40:59,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 19:41:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282015903] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:00,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:00,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-04-01 19:41:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903662101] [2023-04-01 19:41:00,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 19:41:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 19:41:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:41:00,059 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 19 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-04-01 19:41:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:00,397 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2023-04-01 19:41:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 19:41:00,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 19 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 105 [2023-04-01 19:41:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:00,398 INFO L225 Difference]: With dead ends: 149 [2023-04-01 19:41:00,398 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 19:41:00,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 217 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1084, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 19:41:00,399 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:00,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 57 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:41:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 19:41:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2023-04-01 19:41:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 74 states have internal predecessors, (74), 16 states have call successors, (16), 13 states have call predecessors, (16), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 19:41:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2023-04-01 19:41:00,413 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 105 [2023-04-01 19:41:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:00,413 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2023-04-01 19:41:00,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 19 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-04-01 19:41:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2023-04-01 19:41:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 19:41:00,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:00,414 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:00,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:00,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:00,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:00,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash 660712962, now seen corresponding path program 12 times [2023-04-01 19:41:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:00,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641621389] [2023-04-01 19:41:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:00,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:41:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:41:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 26 proven. 116 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 19:41:01,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:01,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641621389] [2023-04-01 19:41:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641621389] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:01,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998367196] [2023-04-01 19:41:01,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:41:01,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:01,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:01,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 19:41:01,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-04-01 19:41:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:01,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 19:41:01,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:01,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:41:05,459 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:41:05,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:41:05,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:41:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 40 proven. 130 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 19:41:06,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:06,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:41:06,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:41:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 26 proven. 116 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 19:41:06,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998367196] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:06,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:06,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 41 [2023-04-01 19:41:06,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963868055] [2023-04-01 19:41:06,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:06,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:41:06,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:06,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:41:06,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1499, Unknown=2, NotChecked=0, Total=1640 [2023-04-01 19:41:06,351 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 41 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 34 states have internal predecessors, (96), 23 states have call successors, (28), 5 states have call predecessors, (28), 3 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2023-04-01 19:41:08,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:10,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:13,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:15,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:17,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:17,825 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2023-04-01 19:41:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 19:41:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 34 states have internal predecessors, (96), 23 states have call successors, (28), 5 states have call predecessors, (28), 3 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) Word has length 105 [2023-04-01 19:41:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:17,826 INFO L225 Difference]: With dead ends: 117 [2023-04-01 19:41:17,826 INFO L226 Difference]: Without dead ends: 115 [2023-04-01 19:41:17,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 202 SyntacticMatches, 17 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=378, Invalid=3652, Unknown=2, NotChecked=0, Total=4032 [2023-04-01 19:41:17,827 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 129 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 69 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:17,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 89 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1615 Invalid, 6 Unknown, 0 Unchecked, 11.1s Time] [2023-04-01 19:41:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-04-01 19:41:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2023-04-01 19:41:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 16 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 19:41:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2023-04-01 19:41:17,844 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 105 [2023-04-01 19:41:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:17,844 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2023-04-01 19:41:17,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 34 states have internal predecessors, (96), 23 states have call successors, (28), 5 states have call predecessors, (28), 3 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2023-04-01 19:41:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2023-04-01 19:41:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 19:41:17,845 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:17,845 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:17,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-01 19:41:18,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 19:41:18,050 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:18,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -361609264, now seen corresponding path program 13 times [2023-04-01 19:41:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:18,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278845180] [2023-04-01 19:41:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:18,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:41:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:41:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:41:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 31 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 19:41:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278845180] [2023-04-01 19:41:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278845180] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746117155] [2023-04-01 19:41:18,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:41:18,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:18,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:18,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 19:41:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:18,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 19:41:18,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:18,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:41:19,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:41:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 30 proven. 144 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-04-01 19:41:19,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:19,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:41:19,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:41:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 31 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 19:41:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746117155] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:19,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 22] total 50 [2023-04-01 19:41:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754851430] [2023-04-01 19:41:19,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 19:41:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 19:41:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2263, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 19:41:19,968 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 50 states, 46 states have (on average 2.369565217391304) internal successors, (109), 42 states have internal predecessors, (109), 28 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (28), 27 states have call predecessors, (28), 26 states have call successors, (28) [2023-04-01 19:41:22,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:24,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:26,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:27,335 INFO L93 Difference]: Finished difference Result 185 states and 191 transitions. [2023-04-01 19:41:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-01 19:41:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 2.369565217391304) internal successors, (109), 42 states have internal predecessors, (109), 28 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (28), 27 states have call predecessors, (28), 26 states have call successors, (28) Word has length 113 [2023-04-01 19:41:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:27,336 INFO L225 Difference]: With dead ends: 185 [2023-04-01 19:41:27,336 INFO L226 Difference]: Without dead ends: 183 [2023-04-01 19:41:27,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 219 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=645, Invalid=6327, Unknown=0, NotChecked=0, Total=6972 [2023-04-01 19:41:27,338 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 240 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 130 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:27,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 113 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2323 Invalid, 3 Unknown, 0 Unchecked, 6.8s Time] [2023-04-01 19:41:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-04-01 19:41:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 126. [2023-04-01 19:41:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 91 states have (on average 1.032967032967033) internal successors, (94), 93 states have internal predecessors, (94), 19 states have call successors, (19), 16 states have call predecessors, (19), 15 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 19:41:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2023-04-01 19:41:27,358 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 113 [2023-04-01 19:41:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:27,358 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2023-04-01 19:41:27,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 2.369565217391304) internal successors, (109), 42 states have internal predecessors, (109), 28 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (28), 27 states have call predecessors, (28), 26 states have call successors, (28) [2023-04-01 19:41:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2023-04-01 19:41:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 19:41:27,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:27,362 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:27,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:27,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 19:41:27,567 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:27,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -756337762, now seen corresponding path program 14 times [2023-04-01 19:41:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:27,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063292741] [2023-04-01 19:41:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:27,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:41:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:41:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:41:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:41:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-01 19:41:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063292741] [2023-04-01 19:41:27,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063292741] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723880592] [2023-04-01 19:41:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:41:27,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:27,786 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:27,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 19:41:27,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:41:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:27,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 19:41:27,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-01 19:41:28,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-01 19:41:28,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723880592] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:28,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:28,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2023-04-01 19:41:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115346406] [2023-04-01 19:41:28,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:28,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 19:41:28,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 19:41:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-04-01 19:41:28,268 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 22 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-04-01 19:41:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:28,628 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2023-04-01 19:41:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 19:41:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 22 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 121 [2023-04-01 19:41:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:28,629 INFO L225 Difference]: With dead ends: 169 [2023-04-01 19:41:28,629 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 19:41:28,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 250 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 19:41:28,630 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 138 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:28,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 42 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:41:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 19:41:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2023-04-01 19:41:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 86 states have internal predecessors, (86), 18 states have call successors, (18), 15 states have call predecessors, (18), 14 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 19:41:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2023-04-01 19:41:28,650 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 121 [2023-04-01 19:41:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:28,651 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2023-04-01 19:41:28,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 22 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-04-01 19:41:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2023-04-01 19:41:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 19:41:28,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:28,652 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:28,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:28,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:28,857 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:28,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:28,857 INFO L85 PathProgramCache]: Analyzing trace with hash -591184097, now seen corresponding path program 15 times [2023-04-01 19:41:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:28,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262734451] [2023-04-01 19:41:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:28,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:41:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:41:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:41:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:41:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 31 proven. 162 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-04-01 19:41:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262734451] [2023-04-01 19:41:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262734451] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096888318] [2023-04-01 19:41:29,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:41:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:29,417 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:29,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-01 19:41:29,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-04-01 19:41:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:29,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 19:41:29,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:29,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:41:30,192 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:41:30,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:41:30,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:41:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 47 proven. 172 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 19:41:30,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:30,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:41:30,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:41:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 31 proven. 162 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-04-01 19:41:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096888318] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:31,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 45 [2023-04-01 19:41:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703633542] [2023-04-01 19:41:31,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-01 19:41:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-01 19:41:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 19:41:31,119 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 45 states, 43 states have (on average 2.511627906976744) internal successors, (108), 38 states have internal predecessors, (108), 27 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (29), 27 states have call predecessors, (29), 25 states have call successors, (29) [2023-04-01 19:41:33,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:35,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:37,063 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2023-04-01 19:41:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-01 19:41:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.511627906976744) internal successors, (108), 38 states have internal predecessors, (108), 27 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (29), 27 states have call predecessors, (29), 25 states have call successors, (29) Word has length 121 [2023-04-01 19:41:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:37,064 INFO L225 Difference]: With dead ends: 133 [2023-04-01 19:41:37,064 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 19:41:37,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 234 SyntacticMatches, 19 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=4546, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 19:41:37,065 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 84 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:37,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 89 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2286 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 19:41:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 19:41:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2023-04-01 19:41:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 91 states have internal predecessors, (92), 18 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 19:41:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2023-04-01 19:41:37,086 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 121 [2023-04-01 19:41:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:37,086 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2023-04-01 19:41:37,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.511627906976744) internal successors, (108), 38 states have internal predecessors, (108), 27 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (29), 27 states have call predecessors, (29), 25 states have call successors, (29) [2023-04-01 19:41:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2023-04-01 19:41:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-01 19:41:37,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:37,087 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:37,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-04-01 19:41:37,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:37,291 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:37,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1030974445, now seen corresponding path program 16 times [2023-04-01 19:41:37,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:37,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694332258] [2023-04-01 19:41:37,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:37,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:41:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:41:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:41:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:41:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:41:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 36 proven. 181 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 19:41:37,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:37,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694332258] [2023-04-01 19:41:37,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694332258] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:37,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242797154] [2023-04-01 19:41:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:41:37,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:37,898 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:37,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-01 19:41:37,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:41:37,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:37,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-01 19:41:37,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:38,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:41:39,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:41:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 208 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-04-01 19:41:39,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:41:39,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:41:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 36 proven. 181 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 19:41:39,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242797154] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:39,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:39,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 24] total 52 [2023-04-01 19:41:39,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947491851] [2023-04-01 19:41:39,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:39,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 19:41:39,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 19:41:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2456, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 19:41:39,491 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 52 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 45 states have internal predecessors, (120), 31 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (31), 30 states have call predecessors, (31), 29 states have call successors, (31) [2023-04-01 19:41:41,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:43,336 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2023-04-01 19:41:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 19:41:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 45 states have internal predecessors, (120), 31 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (31), 30 states have call predecessors, (31), 29 states have call successors, (31) Word has length 129 [2023-04-01 19:41:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:43,337 INFO L225 Difference]: With dead ends: 209 [2023-04-01 19:41:43,337 INFO L226 Difference]: Without dead ends: 207 [2023-04-01 19:41:43,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2315 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=696, Invalid=7136, Unknown=0, NotChecked=0, Total=7832 [2023-04-01 19:41:43,339 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 240 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 138 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:43,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 138 Invalid, 2993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2854 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 19:41:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-04-01 19:41:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 142. [2023-04-01 19:41:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.029126213592233) internal successors, (106), 105 states have internal predecessors, (106), 21 states have call successors, (21), 18 states have call predecessors, (21), 17 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 19:41:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2023-04-01 19:41:43,369 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 129 [2023-04-01 19:41:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:43,370 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2023-04-01 19:41:43,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 45 states have internal predecessors, (120), 31 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (31), 30 states have call predecessors, (31), 29 states have call successors, (31) [2023-04-01 19:41:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2023-04-01 19:41:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 19:41:43,371 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:43,371 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:43,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:43,577 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:43,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:43,577 INFO L85 PathProgramCache]: Analyzing trace with hash 4778683, now seen corresponding path program 17 times [2023-04-01 19:41:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661940207] [2023-04-01 19:41:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:41:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:41:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:41:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:41:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:41:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:41:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 87 proven. 116 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-04-01 19:41:43,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661940207] [2023-04-01 19:41:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661940207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334968389] [2023-04-01 19:41:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:41:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:43,814 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:43,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-01 19:41:43,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-04-01 19:41:43,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:43,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 19:41:43,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 112 proven. 91 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-04-01 19:41:44,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 112 proven. 91 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-04-01 19:41:44,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334968389] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:44,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:44,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2023-04-01 19:41:44,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097785203] [2023-04-01 19:41:44,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:44,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 19:41:44,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 19:41:44,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2023-04-01 19:41:44,372 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 25 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2023-04-01 19:41:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:44,733 INFO L93 Difference]: Finished difference Result 189 states and 202 transitions. [2023-04-01 19:41:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 19:41:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 25 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) Word has length 137 [2023-04-01 19:41:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:44,734 INFO L225 Difference]: With dead ends: 189 [2023-04-01 19:41:44,734 INFO L226 Difference]: Without dead ends: 145 [2023-04-01 19:41:44,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 283 SyntacticMatches, 15 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1756, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 19:41:44,736 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:44,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 42 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:41:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-01 19:41:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2023-04-01 19:41:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 98 states have internal predecessors, (98), 20 states have call successors, (20), 17 states have call predecessors, (20), 16 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 19:41:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2023-04-01 19:41:44,761 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 137 [2023-04-01 19:41:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2023-04-01 19:41:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 25 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2023-04-01 19:41:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2023-04-01 19:41:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 19:41:44,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:44,763 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:44,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-01 19:41:44,969 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:44,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1499587900, now seen corresponding path program 18 times [2023-04-01 19:41:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712201359] [2023-04-01 19:41:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:41:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:41:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:41:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:41:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:41:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:41:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:41:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:41:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:41:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:41:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:41:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:41:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:41:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:41:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:41:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:41:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 36 proven. 216 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 19:41:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712201359] [2023-04-01 19:41:45,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712201359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994323793] [2023-04-01 19:41:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:41:45,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:45,561 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:45,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-01 19:41:45,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-04-01 19:41:45,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:45,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 19:41:45,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:46,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:41:46,280 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:41:46,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:41:47,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:41:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 54 proven. 228 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 19:41:47,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:47,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:41:47,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:41:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 36 proven. 216 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 19:41:47,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994323793] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:47,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:47,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 49 [2023-04-01 19:41:47,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010701343] [2023-04-01 19:41:47,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 19:41:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 19:41:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2181, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 19:41:47,539 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 49 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 42 states have internal predecessors, (120), 31 states have call successors, (36), 5 states have call predecessors, (36), 3 states have return successors, (33), 31 states have call predecessors, (33), 29 states have call successors, (33) [2023-04-01 19:41:49,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:51,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:54,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:56,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:58,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:59,409 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2023-04-01 19:41:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 19:41:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 42 states have internal predecessors, (120), 31 states have call successors, (36), 5 states have call predecessors, (36), 3 states have return successors, (33), 31 states have call predecessors, (33), 29 states have call successors, (33) Word has length 137 [2023-04-01 19:41:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:59,410 INFO L225 Difference]: With dead ends: 149 [2023-04-01 19:41:59,410 INFO L226 Difference]: Without dead ends: 147 [2023-04-01 19:41:59,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 266 SyntacticMatches, 21 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=462, Invalid=5390, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 19:41:59,411 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 137 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 3145 mSolverCounterSat, 83 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3145 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:59,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 130 Invalid, 3233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3145 Invalid, 5 Unknown, 0 Unchecked, 11.2s Time] [2023-04-01 19:41:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-01 19:41:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2023-04-01 19:41:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 103 states have internal predecessors, (104), 20 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 19:41:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2023-04-01 19:41:59,441 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 137 [2023-04-01 19:41:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:59,441 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2023-04-01 19:41:59,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 42 states have internal predecessors, (120), 31 states have call successors, (36), 5 states have call predecessors, (36), 3 states have return successors, (33), 31 states have call predecessors, (33), 29 states have call successors, (33) [2023-04-01 19:41:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2023-04-01 19:41:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 19:41:59,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:59,442 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:59,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:59,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-01 19:41:59,647 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:59,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1741464842, now seen corresponding path program 19 times [2023-04-01 19:41:59,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:59,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655678325] [2023-04-01 19:41:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:42:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:42:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 41 proven. 239 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-04-01 19:42:00,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655678325] [2023-04-01 19:42:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655678325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785740732] [2023-04-01 19:42:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:42:00,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:00,238 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:00,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-01 19:42:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:00,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-01 19:42:00,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:00,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:42:01,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:42:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 42 proven. 256 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-04-01 19:42:01,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:01,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:42:01,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:42:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 41 proven. 239 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-04-01 19:42:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785740732] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:01,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 26] total 56 [2023-04-01 19:42:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807194879] [2023-04-01 19:42:01,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 19:42:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 19:42:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2866, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 19:42:01,778 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 56 states, 53 states have (on average 2.490566037735849) internal successors, (132), 49 states have internal predecessors, (132), 35 states have call successors, (39), 5 states have call predecessors, (39), 4 states have return successors, (35), 34 states have call predecessors, (35), 33 states have call successors, (35) [2023-04-01 19:42:04,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:05,954 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2023-04-01 19:42:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-01 19:42:05,954 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.490566037735849) internal successors, (132), 49 states have internal predecessors, (132), 35 states have call successors, (39), 5 states have call predecessors, (39), 4 states have return successors, (35), 34 states have call predecessors, (35), 33 states have call successors, (35) Word has length 145 [2023-04-01 19:42:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:05,955 INFO L225 Difference]: With dead ends: 233 [2023-04-01 19:42:05,955 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 19:42:05,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 283 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2749 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=763, Invalid=8357, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 19:42:05,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 315 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3347 mSolverCounterSat, 171 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 3519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:05,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 117 Invalid, 3519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3347 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 19:42:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 19:42:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 158. [2023-04-01 19:42:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 117 states have internal predecessors, (118), 23 states have call successors, (23), 20 states have call predecessors, (23), 19 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 19:42:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 163 transitions. [2023-04-01 19:42:05,986 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 163 transitions. Word has length 145 [2023-04-01 19:42:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:05,986 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 163 transitions. [2023-04-01 19:42:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.490566037735849) internal successors, (132), 49 states have internal predecessors, (132), 35 states have call successors, (39), 5 states have call predecessors, (39), 4 states have return successors, (35), 34 states have call predecessors, (35), 33 states have call successors, (35) [2023-04-01 19:42:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 163 transitions. [2023-04-01 19:42:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 19:42:05,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:05,987 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:05,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:06,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:06,192 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:06,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash -904284456, now seen corresponding path program 20 times [2023-04-01 19:42:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:06,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310371234] [2023-04-01 19:42:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:06,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 19:42:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:42:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 115 proven. 149 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-04-01 19:42:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310371234] [2023-04-01 19:42:06,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310371234] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546699864] [2023-04-01 19:42:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:42:06,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:06,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:06,541 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:06,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-01 19:42:06,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:42:06,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:06,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 19:42:06,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 144 proven. 120 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-04-01 19:42:06,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 144 proven. 120 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-04-01 19:42:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546699864] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:07,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:07,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2023-04-01 19:42:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780879763] [2023-04-01 19:42:07,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:07,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:42:07,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:42:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:42:07,141 INFO L87 Difference]: Start difference. First operand 158 states and 163 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 28 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2023-04-01 19:42:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:07,672 INFO L93 Difference]: Finished difference Result 209 states and 223 transitions. [2023-04-01 19:42:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:42:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 28 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) Word has length 153 [2023-04-01 19:42:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:07,673 INFO L225 Difference]: With dead ends: 209 [2023-04-01 19:42:07,673 INFO L226 Difference]: Without dead ends: 161 [2023-04-01 19:42:07,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 316 SyntacticMatches, 17 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=604, Invalid=2152, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 19:42:07,674 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 174 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:07,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 52 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:42:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-04-01 19:42:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2023-04-01 19:42:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 110 states have internal predecessors, (110), 22 states have call successors, (22), 19 states have call predecessors, (22), 18 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 19:42:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2023-04-01 19:42:07,714 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 153 [2023-04-01 19:42:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:07,714 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2023-04-01 19:42:07,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 28 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2023-04-01 19:42:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2023-04-01 19:42:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 19:42:07,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:07,715 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:07,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:07,920 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:07,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 370450521, now seen corresponding path program 21 times [2023-04-01 19:42:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721288584] [2023-04-01 19:42:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:07,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:42:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 41 proven. 278 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-04-01 19:42:08,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721288584] [2023-04-01 19:42:08,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721288584] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343796542] [2023-04-01 19:42:08,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:42:08,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:08,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:08,658 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:08,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-04-01 19:42:08,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-01 19:42:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:08,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-01 19:42:08,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:09,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:42:09,470 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:42:09,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:42:10,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:42:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 61 proven. 292 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-04-01 19:42:10,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:10,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:42:10,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:42:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 41 proven. 278 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-04-01 19:42:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343796542] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:10,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:10,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 55 [2023-04-01 19:42:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561926699] [2023-04-01 19:42:10,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-01 19:42:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-01 19:42:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2774, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 19:42:10,734 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 55 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 47 states have internal predecessors, (133), 36 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (38), 36 states have call predecessors, (38), 34 states have call successors, (38) [2023-04-01 19:42:13,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:15,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:17,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:19,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:20,908 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2023-04-01 19:42:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 19:42:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 47 states have internal predecessors, (133), 36 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (38), 36 states have call predecessors, (38), 34 states have call successors, (38) Word has length 153 [2023-04-01 19:42:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:20,909 INFO L225 Difference]: With dead ends: 165 [2023-04-01 19:42:20,909 INFO L226 Difference]: Without dead ends: 163 [2023-04-01 19:42:20,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 298 SyntacticMatches, 22 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=516, Invalid=6624, Unknown=0, NotChecked=0, Total=7140 [2023-04-01 19:42:20,910 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 3960 mSolverCounterSat, 97 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3960 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:20,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 140 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3960 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2023-04-01 19:42:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-04-01 19:42:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2023-04-01 19:42:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 115 states have internal predecessors, (116), 22 states have call successors, (22), 20 states have call predecessors, (22), 19 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 19:42:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2023-04-01 19:42:20,954 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 153 [2023-04-01 19:42:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:20,954 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2023-04-01 19:42:20,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 47 states have internal predecessors, (133), 36 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (38), 36 states have call predecessors, (38), 34 states have call successors, (38) [2023-04-01 19:42:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2023-04-01 19:42:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 19:42:20,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:20,955 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:20,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:21,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-01 19:42:21,155 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:21,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 458552103, now seen corresponding path program 22 times [2023-04-01 19:42:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:21,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410566873] [2023-04-01 19:42:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:21,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:42:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 46 proven. 305 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-04-01 19:42:21,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410566873] [2023-04-01 19:42:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410566873] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636177282] [2023-04-01 19:42:21,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:42:21,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:21,795 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:21,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-04-01 19:42:21,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:42:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:21,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-01 19:42:21,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:22,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:42:23,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:42:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 30 proven. 342 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-04-01 19:42:23,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:23,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:42:23,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:42:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 46 proven. 305 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-04-01 19:42:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636177282] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:23,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:23,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 28] total 60 [2023-04-01 19:42:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440351349] [2023-04-01 19:42:23,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:23,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-04-01 19:42:23,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-04-01 19:42:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3308, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 19:42:23,738 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 60 states, 57 states have (on average 2.526315789473684) internal successors, (144), 53 states have internal predecessors, (144), 39 states have call successors, (43), 5 states have call predecessors, (43), 4 states have return successors, (39), 38 states have call predecessors, (39), 37 states have call successors, (39) [2023-04-01 19:42:26,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:28,118 INFO L93 Difference]: Finished difference Result 257 states and 263 transitions. [2023-04-01 19:42:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 19:42:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 2.526315789473684) internal successors, (144), 53 states have internal predecessors, (144), 39 states have call successors, (43), 5 states have call predecessors, (43), 4 states have return successors, (39), 38 states have call predecessors, (39), 37 states have call successors, (39) Word has length 161 [2023-04-01 19:42:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:28,119 INFO L225 Difference]: With dead ends: 257 [2023-04-01 19:42:28,119 INFO L226 Difference]: Without dead ends: 255 [2023-04-01 19:42:28,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 315 SyntacticMatches, 19 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=830, Invalid=9676, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 19:42:28,121 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 253 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4545 mSolverCounterSat, 151 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 4697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 4545 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:28,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 161 Invalid, 4697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 4545 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 19:42:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-04-01 19:42:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 174. [2023-04-01 19:42:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 129 states have internal predecessors, (130), 25 states have call successors, (25), 22 states have call predecessors, (25), 21 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 19:42:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2023-04-01 19:42:28,221 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 161 [2023-04-01 19:42:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:28,221 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2023-04-01 19:42:28,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 2.526315789473684) internal successors, (144), 53 states have internal predecessors, (144), 39 states have call successors, (43), 5 states have call predecessors, (43), 4 states have return successors, (39), 38 states have call predecessors, (39), 37 states have call successors, (39) [2023-04-01 19:42:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2023-04-01 19:42:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 19:42:28,222 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:28,222 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:28,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:28,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-04-01 19:42:28,427 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:28,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 456431605, now seen corresponding path program 23 times [2023-04-01 19:42:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:28,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876471279] [2023-04-01 19:42:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:28,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-04-01 19:42:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:42:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 147 proven. 186 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-04-01 19:42:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876471279] [2023-04-01 19:42:28,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876471279] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625993309] [2023-04-01 19:42:28,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:42:28,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:28,768 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:28,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-04-01 19:42:28,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-04-01 19:42:28,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:28,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 19:42:28,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 180 proven. 153 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-04-01 19:42:29,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 180 proven. 153 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-04-01 19:42:29,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625993309] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:29,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:29,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2023-04-01 19:42:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403590768] [2023-04-01 19:42:29,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:29,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 19:42:29,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 19:42:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:42:29,383 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 35 states have internal predecessors, (109), 31 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-04-01 19:42:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:29,940 INFO L93 Difference]: Finished difference Result 229 states and 244 transitions. [2023-04-01 19:42:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:42:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 35 states have internal predecessors, (109), 31 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) Word has length 169 [2023-04-01 19:42:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:29,941 INFO L225 Difference]: With dead ends: 229 [2023-04-01 19:42:29,941 INFO L226 Difference]: Without dead ends: 177 [2023-04-01 19:42:29,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 349 SyntacticMatches, 19 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=2588, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 19:42:29,942 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 177 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:29,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 67 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:42:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-01 19:42:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2023-04-01 19:42:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 122 states have internal predecessors, (122), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 19:42:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2023-04-01 19:42:29,976 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 169 [2023-04-01 19:42:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:29,976 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2023-04-01 19:42:29,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 35 states have internal predecessors, (109), 31 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-04-01 19:42:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2023-04-01 19:42:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 19:42:29,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:29,977 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:29,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-04-01 19:42:30,182 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:30,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -860721034, now seen corresponding path program 24 times [2023-04-01 19:42:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:30,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743177937] [2023-04-01 19:42:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:42:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:42:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 46 proven. 348 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-04-01 19:42:30,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743177937] [2023-04-01 19:42:30,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743177937] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48247745] [2023-04-01 19:42:30,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:42:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:30,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:30,905 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:30,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-04-01 19:42:31,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-04-01 19:42:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:31,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 19:42:31,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:31,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:42:35,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-04-01 19:42:36,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:42:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 68 proven. 364 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-04-01 19:42:36,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:36,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-04-01 19:42:37,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-04-01 19:42:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 46 proven. 348 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-04-01 19:42:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48247745] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:37,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:37,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 59 [2023-04-01 19:42:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362676497] [2023-04-01 19:42:37,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-04-01 19:42:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-04-01 19:42:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3201, Unknown=2, NotChecked=0, Total=3422 [2023-04-01 19:42:37,292 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 59 states, 56 states have (on average 2.5892857142857144) internal successors, (145), 51 states have internal predecessors, (145), 40 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (42), 40 states have call predecessors, (42), 38 states have call successors, (42) [2023-04-01 19:42:39,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:42,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:43,105 INFO L93 Difference]: Finished difference Result 287 states and 300 transitions. [2023-04-01 19:42:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 19:42:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 2.5892857142857144) internal successors, (145), 51 states have internal predecessors, (145), 40 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (42), 40 states have call predecessors, (42), 38 states have call successors, (42) Word has length 169 [2023-04-01 19:42:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:43,107 INFO L225 Difference]: With dead ends: 287 [2023-04-01 19:42:43,107 INFO L226 Difference]: Without dead ends: 285 [2023-04-01 19:42:43,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 330 SyntacticMatches, 24 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=668, Invalid=8450, Unknown=2, NotChecked=0, Total=9120 [2023-04-01 19:42:43,108 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 324 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4080 mSolverCounterSat, 201 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 4283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 4080 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:43,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 100 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 4080 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 19:42:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-04-01 19:42:43,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 190. [2023-04-01 19:42:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 28 states have call successors, (28), 23 states have call predecessors, (28), 22 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 19:42:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 199 transitions. [2023-04-01 19:42:43,169 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 199 transitions. Word has length 169 [2023-04-01 19:42:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:43,169 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 199 transitions. [2023-04-01 19:42:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 2.5892857142857144) internal successors, (145), 51 states have internal predecessors, (145), 40 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (42), 40 states have call predecessors, (42), 38 states have call successors, (42) [2023-04-01 19:42:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 199 transitions. [2023-04-01 19:42:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 19:42:43,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:43,170 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:43,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:43,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-04-01 19:42:43,376 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:43,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1256412740, now seen corresponding path program 25 times [2023-04-01 19:42:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653218978] [2023-04-01 19:42:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:42:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:42:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:42:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 51 proven. 379 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-04-01 19:42:44,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653218978] [2023-04-01 19:42:44,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653218978] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673190682] [2023-04-01 19:42:44,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:42:44,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:44,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:44,132 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:44,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-04-01 19:42:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:44,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-01 19:42:44,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:44,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:42:46,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:42:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 54 proven. 400 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-04-01 19:42:46,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:46,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:42:46,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:42:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 51 proven. 379 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-04-01 19:42:46,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673190682] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:46,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:46,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 30] total 66 [2023-04-01 19:42:46,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317191720] [2023-04-01 19:42:46,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:46,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-04-01 19:42:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-04-01 19:42:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4031, Unknown=0, NotChecked=0, Total=4290 [2023-04-01 19:42:46,505 INFO L87 Difference]: Start difference. First operand 190 states and 199 transitions. Second operand has 66 states, 62 states have (on average 2.532258064516129) internal successors, (157), 58 states have internal predecessors, (157), 44 states have call successors, (48), 5 states have call predecessors, (48), 4 states have return successors, (44), 43 states have call predecessors, (44), 42 states have call successors, (44) [2023-04-01 19:42:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:49,168 INFO L93 Difference]: Finished difference Result 327 states and 345 transitions. [2023-04-01 19:42:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 19:42:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 62 states have (on average 2.532258064516129) internal successors, (157), 58 states have internal predecessors, (157), 44 states have call successors, (48), 5 states have call predecessors, (48), 4 states have return successors, (44), 43 states have call predecessors, (44), 42 states have call successors, (44) Word has length 177 [2023-04-01 19:42:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:49,170 INFO L225 Difference]: With dead ends: 327 [2023-04-01 19:42:49,170 INFO L226 Difference]: Without dead ends: 325 [2023-04-01 19:42:49,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 347 SyntacticMatches, 20 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3866 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=913, Invalid=11519, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 19:42:49,172 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 324 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4446 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:49,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 137 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4446 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 19:42:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-04-01 19:42:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 203. [2023-04-01 19:42:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 151 states have internal predecessors, (154), 29 states have call successors, (29), 25 states have call predecessors, (29), 24 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 19:42:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 211 transitions. [2023-04-01 19:42:49,231 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 211 transitions. Word has length 177 [2023-04-01 19:42:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:49,232 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 211 transitions. [2023-04-01 19:42:49,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 62 states have (on average 2.532258064516129) internal successors, (157), 58 states have internal predecessors, (157), 44 states have call successors, (48), 5 states have call predecessors, (48), 4 states have return successors, (44), 43 states have call predecessors, (44), 42 states have call successors, (44) [2023-04-01 19:42:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 211 transitions. [2023-04-01 19:42:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 19:42:49,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:49,233 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:49,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-04-01 19:42:49,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:49,438 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:49,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash 527470098, now seen corresponding path program 26 times [2023-04-01 19:42:49,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:49,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613272902] [2023-04-01 19:42:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:49,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:42:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 19:42:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:42:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:42:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 19:42:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 183 proven. 227 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-04-01 19:42:49,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:49,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613272902] [2023-04-01 19:42:49,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613272902] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:49,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648076570] [2023-04-01 19:42:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:42:49,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:49,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:49,780 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:49,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-04-01 19:42:49,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:42:49,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:49,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 19:42:49,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 220 proven. 190 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-04-01 19:42:50,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 220 proven. 190 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-04-01 19:42:50,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648076570] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:50,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:50,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2023-04-01 19:42:50,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048874149] [2023-04-01 19:42:50,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 19:42:50,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 19:42:50,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 19:42:50,403 INFO L87 Difference]: Start difference. First operand 203 states and 211 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 38 states have internal predecessors, (118), 34 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2023-04-01 19:42:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:51,047 INFO L93 Difference]: Finished difference Result 294 states and 322 transitions. [2023-04-01 19:42:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 19:42:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 38 states have internal predecessors, (118), 34 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) Word has length 185 [2023-04-01 19:42:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:51,049 INFO L225 Difference]: With dead ends: 294 [2023-04-01 19:42:51,049 INFO L226 Difference]: Without dead ends: 238 [2023-04-01 19:42:51,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 382 SyntacticMatches, 21 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=842, Invalid=3064, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 19:42:51,050 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 216 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:51,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 37 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:42:51,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-01 19:42:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2023-04-01 19:42:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 142 states have (on average 1.028169014084507) internal successors, (146), 144 states have internal predecessors, (146), 28 states have call successors, (28), 24 states have call predecessors, (28), 23 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 19:42:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2023-04-01 19:42:51,096 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 185 [2023-04-01 19:42:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:51,096 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2023-04-01 19:42:51,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 38 states have internal predecessors, (118), 34 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2023-04-01 19:42:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2023-04-01 19:42:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 19:42:51,097 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:51,097 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:51,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:51,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:51,303 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:51,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2014467475, now seen corresponding path program 27 times [2023-04-01 19:42:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:51,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43188689] [2023-04-01 19:42:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:51,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:42:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 19:42:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:42:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:42:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 19:42:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 51 proven. 426 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-01 19:42:52,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43188689] [2023-04-01 19:42:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43188689] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258026313] [2023-04-01 19:42:52,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:42:52,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:52,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:52,128 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:52,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-04-01 19:42:52,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-04-01 19:42:52,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:52,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-01 19:42:52,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:52,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:42:53,061 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:42:53,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-04-01 19:42:54,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-04-01 19:42:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 75 proven. 444 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-04-01 19:42:54,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:54,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:42:54,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:42:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 51 proven. 426 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-01 19:42:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258026313] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:54,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:54,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 61 [2023-04-01 19:42:54,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525358292] [2023-04-01 19:42:54,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:54,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-01 19:42:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:54,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-01 19:42:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3441, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 19:42:54,613 INFO L87 Difference]: Start difference. First operand 194 states and 201 transitions. Second operand has 61 states, 59 states have (on average 2.6440677966101696) internal successors, (156), 54 states have internal predecessors, (156), 43 states have call successors, (48), 5 states have call predecessors, (48), 3 states have return successors, (45), 43 states have call predecessors, (45), 41 states have call successors, (45) [2023-04-01 19:42:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:56,975 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2023-04-01 19:42:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 19:42:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.6440677966101696) internal successors, (156), 54 states have internal predecessors, (156), 43 states have call successors, (48), 5 states have call predecessors, (48), 3 states have return successors, (45), 43 states have call predecessors, (45), 41 states have call successors, (45) Word has length 185 [2023-04-01 19:42:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:56,996 INFO L225 Difference]: With dead ends: 244 [2023-04-01 19:42:56,996 INFO L226 Difference]: Without dead ends: 242 [2023-04-01 19:42:56,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 362 SyntacticMatches, 27 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=576, Invalid=8354, Unknown=0, NotChecked=0, Total=8930 [2023-04-01 19:42:56,997 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 178 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4378 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 4487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:56,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 122 Invalid, 4487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4378 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 19:42:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-04-01 19:42:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2023-04-01 19:42:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 179 states have internal predecessors, (180), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-01 19:42:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 255 transitions. [2023-04-01 19:42:57,119 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 255 transitions. Word has length 185 [2023-04-01 19:42:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:57,119 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 255 transitions. [2023-04-01 19:42:57,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.6440677966101696) internal successors, (156), 54 states have internal predecessors, (156), 43 states have call successors, (48), 5 states have call predecessors, (48), 3 states have return successors, (45), 43 states have call predecessors, (45), 41 states have call successors, (45) [2023-04-01 19:42:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 255 transitions. [2023-04-01 19:42:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 19:42:57,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:57,120 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:57,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:57,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-04-01 19:42:57,326 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:57,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 709807713, now seen corresponding path program 28 times [2023-04-01 19:42:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:57,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320342141] [2023-04-01 19:42:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:57,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:42:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:42:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:42:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:42:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:42:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:42:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:42:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:42:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:42:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:42:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:42:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:42:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 19:42:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:42:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:42:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:42:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:42:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:42:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:42:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:42:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:42:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 19:42:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 19:42:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 56 proven. 461 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2023-04-01 19:42:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320342141] [2023-04-01 19:42:58,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320342141] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22438094] [2023-04-01 19:42:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:42:58,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:58,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:58,530 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:58,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-04-01 19:42:58,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:42:58,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:58,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 71 conjunts are in the unsatisfiable core [2023-04-01 19:42:58,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:59,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:43:00,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:43:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 36 proven. 508 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2023-04-01 19:43:00,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:43:00,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 19:43:00,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 19:43:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 56 proven. 461 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2023-04-01 19:43:01,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22438094] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:43:01,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:43:01,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 32] total 68 [2023-04-01 19:43:01,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985039638] [2023-04-01 19:43:01,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:43:01,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-04-01 19:43:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:43:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-04-01 19:43:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=4288, Unknown=0, NotChecked=0, Total=4556 [2023-04-01 19:43:01,162 INFO L87 Difference]: Start difference. First operand 240 states and 255 transitions. Second operand has 68 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 61 states have internal predecessors, (168), 47 states have call successors, (51), 5 states have call predecessors, (51), 4 states have return successors, (47), 46 states have call predecessors, (47), 45 states have call successors, (47) [2023-04-01 19:43:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:43:03,951 INFO L93 Difference]: Finished difference Result 351 states and 366 transitions. [2023-04-01 19:43:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-01 19:43:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 61 states have internal predecessors, (168), 47 states have call successors, (51), 5 states have call predecessors, (51), 4 states have return successors, (47), 46 states have call predecessors, (47), 45 states have call successors, (47) Word has length 193 [2023-04-01 19:43:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:43:03,952 INFO L225 Difference]: With dead ends: 351 [2023-04-01 19:43:03,952 INFO L226 Difference]: Without dead ends: 349 [2023-04-01 19:43:03,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 379 SyntacticMatches, 23 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=964, Invalid=12608, Unknown=0, NotChecked=0, Total=13572 [2023-04-01 19:43:03,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 339 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 5963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:43:03,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 179 Invalid, 5963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 5755 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 19:43:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-04-01 19:43:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 334. [2023-04-01 19:43:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 247 states have (on average 1.0202429149797572) internal successors, (252), 250 states have internal predecessors, (252), 49 states have call successors, (49), 38 states have call predecessors, (49), 37 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-01 19:43:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 349 transitions. [2023-04-01 19:43:04,144 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 349 transitions. Word has length 193 [2023-04-01 19:43:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:43:04,144 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 349 transitions. [2023-04-01 19:43:04,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 61 states have internal predecessors, (168), 47 states have call successors, (51), 5 states have call predecessors, (51), 4 states have return successors, (47), 46 states have call predecessors, (47), 45 states have call successors, (47) [2023-04-01 19:43:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 349 transitions. [2023-04-01 19:43:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 19:43:04,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:43:04,145 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:43:04,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-04-01 19:43:04,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:43:04,351 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:43:04,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:43:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash 879652451, now seen corresponding path program 29 times [2023-04-01 19:43:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:43:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125393310] [2023-04-01 19:43:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:43:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:43:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:43:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:43:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:43:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:43:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:43:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:43:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:43:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:43:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:43:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:43:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:43:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:43:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:43:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 19:43:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 19:43:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-04-01 19:43:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:43:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:43:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:43:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:43:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:43:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:43:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 19:43:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 19:43:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 58 proven. 489 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 19:43:05,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:43:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125393310] [2023-04-01 19:43:05,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125393310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:43:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165943360] [2023-04-01 19:43:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:43:05,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:43:05,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:43:05,417 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:43:05,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-04-01 19:43:05,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-04-01 19:43:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:43:05,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 75 conjunts are in the unsatisfiable core [2023-04-01 19:43:05,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:43:06,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:43:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:43:06,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:43:06,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:43:06,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:43:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:43:06,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:43:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:43:06,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:43:07,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:43:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 212 proven. 505 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-04-01 19:43:07,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:43:07,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-04-01 19:43:07,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 19:43:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 46 proven. 486 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-04-01 19:43:08,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165943360] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:43:08,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:43:08,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 31] total 67 [2023-04-01 19:43:08,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532244154] [2023-04-01 19:43:08,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:43:08,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-01 19:43:08,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:43:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-01 19:43:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 19:43:08,018 INFO L87 Difference]: Start difference. First operand 334 states and 349 transitions. Second operand has 67 states, 64 states have (on average 2.65625) internal successors, (170), 60 states have internal predecessors, (170), 47 states have call successors, (51), 5 states have call predecessors, (51), 3 states have return successors, (47), 46 states have call predecessors, (47), 45 states have call successors, (47) [2023-04-01 19:43:10,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:43:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:43:12,230 INFO L93 Difference]: Finished difference Result 360 states and 376 transitions. [2023-04-01 19:43:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 19:43:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 64 states have (on average 2.65625) internal successors, (170), 60 states have internal predecessors, (170), 47 states have call successors, (51), 5 states have call predecessors, (51), 3 states have return successors, (47), 46 states have call predecessors, (47), 45 states have call successors, (47) Word has length 193 [2023-04-01 19:43:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:43:12,232 INFO L225 Difference]: With dead ends: 360 [2023-04-01 19:43:12,232 INFO L226 Difference]: Without dead ends: 358 [2023-04-01 19:43:12,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 374 SyntacticMatches, 31 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3832 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=770, Invalid=9532, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 19:43:12,233 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5877 mSolverCounterSat, 108 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 5986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5877 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:43:12,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 162 Invalid, 5986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5877 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 19:43:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-04-01 19:43:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 302. [2023-04-01 19:43:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 226 states have internal predecessors, (227), 44 states have call successors, (44), 35 states have call predecessors, (44), 34 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 19:43:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 314 transitions. [2023-04-01 19:43:12,345 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 314 transitions. Word has length 193 [2023-04-01 19:43:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:43:12,345 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 314 transitions. [2023-04-01 19:43:12,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 64 states have (on average 2.65625) internal successors, (170), 60 states have internal predecessors, (170), 47 states have call successors, (51), 5 states have call predecessors, (51), 3 states have return successors, (47), 46 states have call predecessors, (47), 45 states have call successors, (47) [2023-04-01 19:43:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 314 transitions. [2023-04-01 19:43:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-01 19:43:12,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:43:12,346 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:43:12,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-04-01 19:43:12,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:43:12,552 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:43:12,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:43:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1134860591, now seen corresponding path program 30 times [2023-04-01 19:43:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:43:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558880099] [2023-04-01 19:43:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:43:12,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:43:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:43:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:43:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:43:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:43:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:43:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:43:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:43:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:43:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:43:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:43:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:43:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:43:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:43:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 19:43:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 19:43:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:43:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:43:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:43:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:43:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:43:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:43:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:43:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 19:43:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 19:43:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2023-04-01 19:43:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 223 proven. 272 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-04-01 19:43:12,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:43:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558880099] [2023-04-01 19:43:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558880099] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:43:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15126407] [2023-04-01 19:43:12,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:43:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:43:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:43:12,945 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:43:12,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-04-01 19:43:13,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-04-01 19:43:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:43:13,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 19:43:13,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:43:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 264 proven. 231 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-04-01 19:43:13,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:43:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 264 proven. 231 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-04-01 19:43:13,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15126407] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:43:13,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:43:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2023-04-01 19:43:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746371890] [2023-04-01 19:43:13,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:43:13,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 19:43:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:43:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 19:43:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 19:43:13,975 INFO L87 Difference]: Start difference. First operand 302 states and 314 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 41 states have internal predecessors, (127), 37 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 36 states have call predecessors, (38), 36 states have call successors, (38) [2023-04-01 19:43:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:43:14,700 INFO L93 Difference]: Finished difference Result 337 states and 354 transitions. [2023-04-01 19:43:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 19:43:14,700 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 41 states have internal predecessors, (127), 37 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 36 states have call predecessors, (38), 36 states have call successors, (38) Word has length 201 [2023-04-01 19:43:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:43:14,701 INFO L225 Difference]: With dead ends: 337 [2023-04-01 19:43:14,701 INFO L226 Difference]: Without dead ends: 249 [2023-04-01 19:43:14,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 415 SyntacticMatches, 23 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=976, Invalid=3580, Unknown=0, NotChecked=0, Total=4556 [2023-04-01 19:43:14,703 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 237 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:43:14,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 47 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:43:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-01 19:43:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2023-04-01 19:43:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 178 states have internal predecessors, (179), 36 states have call successors, (36), 27 states have call predecessors, (36), 26 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-04-01 19:43:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 250 transitions. [2023-04-01 19:43:14,791 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 250 transitions. Word has length 201 [2023-04-01 19:43:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:43:14,791 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 250 transitions. [2023-04-01 19:43:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 41 states have internal predecessors, (127), 37 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 36 states have call predecessors, (38), 36 states have call successors, (38) [2023-04-01 19:43:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 250 transitions. [2023-04-01 19:43:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-01 19:43:14,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:43:14,792 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:43:14,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-04-01 19:43:14,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-04-01 19:43:14,999 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:43:14,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:43:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1410027440, now seen corresponding path program 31 times [2023-04-01 19:43:14,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:43:14,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417866851] [2023-04-01 19:43:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:43:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:43:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:43:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:43:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-01 19:43:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:43:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:43:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:43:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 19:43:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:43:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:43:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 19:43:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 19:43:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 19:43:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 19:43:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 19:43:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 19:43:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 19:43:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:43:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-04-01 19:43:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-04-01 19:43:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-04-01 19:43:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 19:43:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-04-01 19:43:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-04-01 19:43:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 19:43:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2023-04-01 19:43:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 56 proven. 512 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-04-01 19:43:15,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:43:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417866851] [2023-04-01 19:43:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417866851] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:43:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493952761] [2023-04-01 19:43:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:43:15,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:43:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:43:15,865 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:43:15,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-04-01 19:43:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:43:16,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-01 19:43:16,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:43:16,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:43:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:43:16,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20