/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-crafted/xor1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:14:12,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:14:12,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:14:12,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:14:12,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:14:12,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:14:12,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:14:12,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:14:12,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:14:12,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:14:12,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:14:12,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:14:12,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:14:12,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:14:12,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:14:12,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:14:12,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:14:12,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:14:12,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:14:12,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:14:12,446 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 19:14:12,480 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:14:12,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:14:12,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:14:12,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:14:12,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:14:12,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:14:12,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:14:12,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:14:12,483 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:14:12,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:14:12,483 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:14:12,484 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:14:12,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:14:12,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:14:12,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:14:12,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:14:12,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:14:12,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:14:12,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:14:12,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:14:12,487 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:14:12,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:14:12,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:14:12,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:14:12,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:14:12,712 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:14:12,713 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:14:12,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor1.i [2023-04-01 19:14:13,844 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:14:14,041 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:14:14,042 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i [2023-04-01 19:14:14,048 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc732c66/87ff777e327c4033b546211fc053e474/FLAGa2cd5d48c [2023-04-01 19:14:14,068 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc732c66/87ff777e327c4033b546211fc053e474 [2023-04-01 19:14:14,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:14:14,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:14:14,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:14:14,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:14:14,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:14:14,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dfc9829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14, skipping insertion in model container [2023-04-01 19:14:14,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:14:14,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:14:14,244 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-crafted/xor1.i[1285,1298] [2023-04-01 19:14:14,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:14:14,257 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:14:14,275 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-crafted/xor1.i[1285,1298] [2023-04-01 19:14:14,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:14:14,287 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:14:14,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14 WrapperNode [2023-04-01 19:14:14,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:14:14,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:14:14,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:14:14,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:14:14,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:14:14,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:14:14,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:14:14,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:14:14,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (1/1) ... [2023-04-01 19:14:14,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:14:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:14,365 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 19:14:14,393 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 19:14:14,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:14:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:14:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:14:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-04-01 19:14:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:14:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-04-01 19:14:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:14:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:14:14,504 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:14:14,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:14:14,749 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:14:14,754 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:14:14,754 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:14:14,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:14:14 BoogieIcfgContainer [2023-04-01 19:14:14,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:14:14,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:14:14,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:14:14,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:14:14,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:14:14" (1/3) ... [2023-04-01 19:14:14,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d5eb71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:14:14, skipping insertion in model container [2023-04-01 19:14:14,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:14" (2/3) ... [2023-04-01 19:14:14,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d5eb71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:14:14, skipping insertion in model container [2023-04-01 19:14:14,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:14:14" (3/3) ... [2023-04-01 19:14:14,764 INFO L112 eAbstractionObserver]: Analyzing ICFG xor1.i [2023-04-01 19:14:14,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:14:14,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:14:14,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:14:14,835 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;@6955eeda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:14:14,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:14:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:14:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:14:14,847 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:14,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:14,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:14,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:14,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1594462314, now seen corresponding path program 1 times [2023-04-01 19:14:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005318944] [2023-04-01 19:14:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:14:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:14:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:14:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:15,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005318944] [2023-04-01 19:14:15,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005318944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:15,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:14:15,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:14:15,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62955872] [2023-04-01 19:14:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:15,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:15,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:14:15,141 INFO L87 Difference]: Start difference. First operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:15,287 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 19:14:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:14:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:15,296 INFO L225 Difference]: With dead ends: 62 [2023-04-01 19:14:15,296 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 19:14:15,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 19:14:15,302 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:15,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 19:14:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 19:14:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-04-01 19:14:15,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 32 [2023-04-01 19:14:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:15,338 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-04-01 19:14:15,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-04-01 19:14:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:14:15,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:15,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:14:15,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:15,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:15,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1766016415, now seen corresponding path program 1 times [2023-04-01 19:14:15,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:15,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816622767] [2023-04-01 19:14:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:15,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:14:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:14:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:14:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:14:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816622767] [2023-04-01 19:14:15,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816622767] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287042024] [2023-04-01 19:14:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:15,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:15,515 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 19:14:15,537 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 19:14:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:15,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:15,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:15,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:15,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287042024] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:15,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:15,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:14:15,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113033741] [2023-04-01 19:14:15,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:15,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:15,682 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:15,709 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 19:14:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:14:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:15,712 INFO L225 Difference]: With dead ends: 54 [2023-04-01 19:14:15,712 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 19:14:15,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:15,715 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:15,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 19:14:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 19:14:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-01 19:14:15,732 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 32 [2023-04-01 19:14:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:15,732 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-01 19:14:15,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-01 19:14:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:14:15,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:15,734 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 19:14:15,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:15,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:15,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:15,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1146944703, now seen corresponding path program 1 times [2023-04-01 19:14:15,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:15,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052474040] [2023-04-01 19:14:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:15,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 19:14:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:14:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:14:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052474040] [2023-04-01 19:14:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052474040] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481249242] [2023-04-01 19:14:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:16,148 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 19:14:16,150 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 19:14:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:16,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:14:16,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481249242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:16,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:16,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 19:14:16,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972121321] [2023-04-01 19:14:16,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:16,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:16,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:16,228 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:16,239 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2023-04-01 19:14:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:16,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-01 19:14:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:16,240 INFO L225 Difference]: With dead ends: 58 [2023-04-01 19:14:16,240 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:14:16,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:16,242 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:16,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:14:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-04-01 19:14:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-04-01 19:14:16,248 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 34 [2023-04-01 19:14:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:16,249 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-04-01 19:14:16,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-04-01 19:14:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 19:14:16,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:16,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-01 19:14:16,259 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 19:14:16,456 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,SelfDestructingSolverStorable2 [2023-04-01 19:14:16,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:16,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1675002724, now seen corresponding path program 1 times [2023-04-01 19:14:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:16,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858657107] [2023-04-01 19:14:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:14:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:14:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:14:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858657107] [2023-04-01 19:14:16,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858657107] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894213384] [2023-04-01 19:14:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:16,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:16,569 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 19:14:16,580 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 19:14:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:16,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:16,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:16,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894213384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:16,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:14:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873557103] [2023-04-01 19:14:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:16,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:16,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:16,661 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:16,671 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-04-01 19:14:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2023-04-01 19:14:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:16,672 INFO L225 Difference]: With dead ends: 51 [2023-04-01 19:14:16,672 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 19:14:16,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:16,674 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:16,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 19:14:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-04-01 19:14:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-04-01 19:14:16,680 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 46 [2023-04-01 19:14:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:16,681 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-04-01 19:14:16,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-04-01 19:14:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:14:16,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:16,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 19:14:16,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 19:14:16,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:16,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:16,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash -711488038, now seen corresponding path program 1 times [2023-04-01 19:14:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:16,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783981421] [2023-04-01 19:14:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:16,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:16,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:14:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:14:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783981421] [2023-04-01 19:14:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783981421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015050021] [2023-04-01 19:14:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:17,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:17,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:17,055 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 19:14:17,056 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 19:14:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:14:17,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:17,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015050021] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:17,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:14:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853442959] [2023-04-01 19:14:17,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:17,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:14:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:14:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:14:17,229 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:17,356 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-04-01 19:14:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:14:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 19:14:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:17,358 INFO L225 Difference]: With dead ends: 63 [2023-04-01 19:14:17,358 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 19:14:17,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:14:17,360 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:17,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 19:14:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 19:14:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 19:14:17,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 48 [2023-04-01 19:14:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:17,373 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 19:14:17,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 19:14:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:14:17,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:17,376 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2023-04-01 19:14:17,384 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 19:14:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:17,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:17,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1508030784, now seen corresponding path program 2 times [2023-04-01 19:14:17,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:17,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344692716] [2023-04-01 19:14:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:17,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:14:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-01 19:14:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 19:14:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 19:14:17,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:17,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344692716] [2023-04-01 19:14:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344692716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475161664] [2023-04-01 19:14:17,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:14:17,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:17,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:17,716 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 19:14:17,718 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 19:14:17,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:14:17,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:17,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:14:17,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:17,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475161664] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:17,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:17,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 19:14:17,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068413806] [2023-04-01 19:14:17,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:17,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 19:14:17,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:17,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 19:14:17,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:14:17,949 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:14:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:18,260 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2023-04-01 19:14:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:14:18,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2023-04-01 19:14:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:18,264 INFO L225 Difference]: With dead ends: 86 [2023-04-01 19:14:18,264 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 19:14:18,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-04-01 19:14:18,269 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:18,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 37 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:14:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 19:14:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-04-01 19:14:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-04-01 19:14:18,286 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2023-04-01 19:14:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:18,286 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-04-01 19:14:18,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:14:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-04-01 19:14:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 19:14:18,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:18,291 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 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] [2023-04-01 19:14:18,299 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 19:14:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:18,499 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:18,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1278523033, now seen corresponding path program 3 times [2023-04-01 19:14:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:18,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591937438] [2023-04-01 19:14:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:18,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:18,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:14:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:18,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:14:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:14:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-04-01 19:14:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591937438] [2023-04-01 19:14:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591937438] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925925458] [2023-04-01 19:14:18,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:14:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:18,611 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 19:14:18,623 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 19:14:18,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:14:18,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:18,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:14:18,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 19:14:18,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 19:14:18,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925925458] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:18,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:18,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-01 19:14:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941010081] [2023-04-01 19:14:18,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:18,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 19:14:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 19:14:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 19:14:18,782 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:14:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:19,030 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2023-04-01 19:14:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:14:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 78 [2023-04-01 19:14:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:19,033 INFO L225 Difference]: With dead ends: 113 [2023-04-01 19:14:19,033 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 19:14:19,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-01 19:14:19,034 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:19,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 19:14:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-04-01 19:14:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.28) internal successors, (96), 75 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-04-01 19:14:19,055 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 78 [2023-04-01 19:14:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:19,055 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-04-01 19:14:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:14:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-04-01 19:14:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 19:14:19,058 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:19,058 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:19,066 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 19:14:19,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:19,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:19,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1076481519, now seen corresponding path program 4 times [2023-04-01 19:14:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:19,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350760976] [2023-04-01 19:14:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:19,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:19,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:19,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:14:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-04-01 19:14:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 19:14:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:19,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:19,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350760976] [2023-04-01 19:14:19,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350760976] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:19,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450574292] [2023-04-01 19:14:19,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:14:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:19,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:19,567 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 19:14:19,593 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 19:14:19,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:14:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:19,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:14:19,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:19,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:20,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450574292] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:20,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:20,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 19:14:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144568343] [2023-04-01 19:14:20,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:14:20,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:14:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:14:20,021 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:20,522 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2023-04-01 19:14:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:14:20,522 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2023-04-01 19:14:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:20,523 INFO L225 Difference]: With dead ends: 163 [2023-04-01 19:14:20,523 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 19:14:20,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 19:14:20,525 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:20,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 22 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:14:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 19:14:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-04-01 19:14:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2023-04-01 19:14:20,533 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 128 [2023-04-01 19:14:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:20,533 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2023-04-01 19:14:20,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2023-04-01 19:14:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 19:14:20,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:20,535 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:20,548 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 19:14:20,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:20,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:20,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash -614230871, now seen corresponding path program 5 times [2023-04-01 19:14:20,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:20,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980893136] [2023-04-01 19:14:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:20,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:21,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:14:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-04-01 19:14:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:21,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-04-01 19:14:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980893136] [2023-04-01 19:14:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980893136] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051326809] [2023-04-01 19:14:21,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:14:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:21,421 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 19:14:21,446 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 19:14:22,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-04-01 19:14:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:22,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:14:22,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2023-04-01 19:14:22,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-04-01 19:14:22,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051326809] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:22,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:22,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-04-01 19:14:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916875191] [2023-04-01 19:14:22,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:22,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:14:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:14:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:14:22,923 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:23,919 INFO L93 Difference]: Finished difference Result 214 states and 293 transitions. [2023-04-01 19:14:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 19:14:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 152 [2023-04-01 19:14:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:23,921 INFO L225 Difference]: With dead ends: 214 [2023-04-01 19:14:23,921 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 19:14:23,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 19:14:23,924 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 335 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:23,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 52 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:14:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 19:14:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2023-04-01 19:14:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 149 states have internal predecessors, (194), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2023-04-01 19:14:23,933 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 152 [2023-04-01 19:14:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:23,933 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2023-04-01 19:14:23,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2023-04-01 19:14:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 19:14:23,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:23,935 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:23,947 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 19:14:24,136 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,SelfDestructingSolverStorable8 [2023-04-01 19:14:24,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:24,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:24,137 INFO L85 PathProgramCache]: Analyzing trace with hash -929769181, now seen corresponding path program 6 times [2023-04-01 19:14:24,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202989217] [2023-04-01 19:14:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:24,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:24,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:24,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:14:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:24,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-04-01 19:14:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:24,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 19:14:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2023-04-01 19:14:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202989217] [2023-04-01 19:14:24,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202989217] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144879323] [2023-04-01 19:14:24,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:14:24,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:24,973 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 19:14:25,001 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 19:14:25,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-01 19:14:25,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:25,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:14:25,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2023-04-01 19:14:25,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2023-04-01 19:14:25,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144879323] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:25,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:25,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2023-04-01 19:14:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268933579] [2023-04-01 19:14:25,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:25,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:14:25,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:14:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:14:25,264 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:25,861 INFO L93 Difference]: Finished difference Result 272 states and 368 transitions. [2023-04-01 19:14:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 19:14:25,862 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 250 [2023-04-01 19:14:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:25,863 INFO L225 Difference]: With dead ends: 272 [2023-04-01 19:14:25,863 INFO L226 Difference]: Without dead ends: 168 [2023-04-01 19:14:25,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1056, Invalid=2850, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 19:14:25,866 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:25,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 37 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-01 19:14:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2023-04-01 19:14:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2023-04-01 19:14:25,875 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 250 [2023-04-01 19:14:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:25,875 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2023-04-01 19:14:25,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2023-04-01 19:14:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 19:14:25,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:25,878 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:25,884 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 19:14:26,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 19:14:26,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:26,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash 440820285, now seen corresponding path program 7 times [2023-04-01 19:14:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:26,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787219705] [2023-04-01 19:14:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:26,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:14:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:26,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 19:14:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-04-01 19:14:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787219705] [2023-04-01 19:14:26,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787219705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950873360] [2023-04-01 19:14:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:14:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:26,871 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 19:14:26,898 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 19:14:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:27,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 19:14:27,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:27,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950873360] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:27,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:27,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2023-04-01 19:14:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280111398] [2023-04-01 19:14:27,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-04-01 19:14:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-04-01 19:14:28,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 19:14:28,003 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:29,287 INFO L93 Difference]: Finished difference Result 331 states and 448 transitions. [2023-04-01 19:14:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 19:14:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 260 [2023-04-01 19:14:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:29,289 INFO L225 Difference]: With dead ends: 331 [2023-04-01 19:14:29,289 INFO L226 Difference]: Without dead ends: 219 [2023-04-01 19:14:29,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 19:14:29,297 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:29,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 27 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:14:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-04-01 19:14:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-04-01 19:14:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 211 states have internal predecessors, (256), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2023-04-01 19:14:29,307 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 260 [2023-04-01 19:14:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:29,309 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2023-04-01 19:14:29,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2023-04-01 19:14:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-04-01 19:14:29,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:29,312 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:29,321 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 19:14:29,519 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,SelfDestructingSolverStorable10 [2023-04-01 19:14:29,519 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:29,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash -199960527, now seen corresponding path program 8 times [2023-04-01 19:14:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780976646] [2023-04-01 19:14:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 19:14:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-04-01 19:14:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 19:14:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:31,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:31,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780976646] [2023-04-01 19:14:31,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780976646] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738179838] [2023-04-01 19:14:31,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:14:31,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:31,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:31,685 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 19:14:31,687 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 19:14:31,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:14:31,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:31,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 19:14:31,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:32,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738179838] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:34,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:34,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 104 [2023-04-01 19:14:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971681646] [2023-04-01 19:14:34,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:34,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-04-01 19:14:34,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-04-01 19:14:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 19:14:34,796 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 104 states, 104 states have (on average 2.2403846153846154) internal successors, (233), 103 states have internal predecessors, (233), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:38,687 INFO L93 Difference]: Finished difference Result 431 states and 572 transitions. [2023-04-01 19:14:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-04-01 19:14:38,689 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.2403846153846154) internal successors, (233), 103 states have internal predecessors, (233), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 312 [2023-04-01 19:14:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:38,691 INFO L225 Difference]: With dead ends: 431 [2023-04-01 19:14:38,691 INFO L226 Difference]: Without dead ends: 319 [2023-04-01 19:14:38,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 580 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6525 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2023-04-01 19:14:38,698 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 229 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:38,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 42 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:14:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-04-01 19:14:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-04-01 19:14:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 311 states have (on average 1.144694533762058) internal successors, (356), 311 states have internal predecessors, (356), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 365 transitions. [2023-04-01 19:14:38,715 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 365 transitions. Word has length 312 [2023-04-01 19:14:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:38,715 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 365 transitions. [2023-04-01 19:14:38,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.2403846153846154) internal successors, (233), 103 states have internal predecessors, (233), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 365 transitions. [2023-04-01 19:14:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-04-01 19:14:38,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:38,722 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:38,729 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 19:14:38,929 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,SelfDestructingSolverStorable11 [2023-04-01 19:14:38,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:38,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 193917269, now seen corresponding path program 9 times [2023-04-01 19:14:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142379219] [2023-04-01 19:14:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-04-01 19:14:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2023-04-01 19:14:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2023-04-01 19:14:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13621 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 11611 trivial. 0 not checked. [2023-04-01 19:14:39,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:39,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142379219] [2023-04-01 19:14:39,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142379219] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:39,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675421644] [2023-04-01 19:14:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:14:39,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:39,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:39,823 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 19:14:39,826 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 19:14:40,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 19:14:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:40,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:14:40,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13621 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 11951 trivial. 0 not checked. [2023-04-01 19:14:40,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13621 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13585 trivial. 0 not checked. [2023-04-01 19:14:40,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675421644] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:40,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:40,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 32 [2023-04-01 19:14:40,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616725512] [2023-04-01 19:14:40,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 19:14:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 19:14:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2023-04-01 19:14:40,491 INFO L87 Difference]: Start difference. First operand 319 states and 365 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:41,094 INFO L93 Difference]: Finished difference Result 457 states and 565 transitions. [2023-04-01 19:14:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 19:14:41,095 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 412 [2023-04-01 19:14:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:41,097 INFO L225 Difference]: With dead ends: 457 [2023-04-01 19:14:41,097 INFO L226 Difference]: Without dead ends: 346 [2023-04-01 19:14:41,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2895, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 19:14:41,098 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 351 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:41,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 42 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:14:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-01 19:14:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2023-04-01 19:14:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 333 states have (on average 1.1441441441441442) internal successors, (381), 333 states have internal predecessors, (381), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 390 transitions. [2023-04-01 19:14:41,112 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 390 transitions. Word has length 412 [2023-04-01 19:14:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:41,113 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 390 transitions. [2023-04-01 19:14:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 390 transitions. [2023-04-01 19:14:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-04-01 19:14:41,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:41,119 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 45, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:41,131 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 19:14:41,326 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,SelfDestructingSolverStorable12 [2023-04-01 19:14:41,326 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:41,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash -809122656, now seen corresponding path program 10 times [2023-04-01 19:14:41,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319539411] [2023-04-01 19:14:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:42,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-04-01 19:14:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:42,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 19:14:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2023-04-01 19:14:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14306 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 12003 trivial. 0 not checked. [2023-04-01 19:14:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319539411] [2023-04-01 19:14:42,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319539411] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471762240] [2023-04-01 19:14:42,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:14:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:42,284 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 19:14:42,286 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 19:14:42,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:14:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:42,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 19:14:42,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14306 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 12007 trivial. 0 not checked. [2023-04-01 19:14:42,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14306 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 12003 trivial. 0 not checked. [2023-04-01 19:14:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471762240] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:43,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2023-04-01 19:14:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132878050] [2023-04-01 19:14:43,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 19:14:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 19:14:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 19:14:43,148 INFO L87 Difference]: Start difference. First operand 341 states and 390 transitions. Second operand has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 19:14:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:43,993 INFO L93 Difference]: Finished difference Result 576 states and 743 transitions. [2023-04-01 19:14:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 19:14:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 440 [2023-04-01 19:14:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:43,995 INFO L225 Difference]: With dead ends: 576 [2023-04-01 19:14:43,996 INFO L226 Difference]: Without dead ends: 443 [2023-04-01 19:14:43,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 19:14:43,998 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 920 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:43,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 27 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:14:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-04-01 19:14:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2023-04-01 19:14:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 435 states have (on average 1.2275862068965517) internal successors, (534), 435 states have internal predecessors, (534), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 543 transitions. [2023-04-01 19:14:44,015 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 543 transitions. Word has length 440 [2023-04-01 19:14:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:44,016 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 543 transitions. [2023-04-01 19:14:44,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 19:14:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 543 transitions. [2023-04-01 19:14:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-04-01 19:14:44,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:44,021 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 96, 96, 96, 96, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:44,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:44,230 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,SelfDestructingSolverStorable13 [2023-04-01 19:14:44,230 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:44,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 842261803, now seen corresponding path program 11 times [2023-04-01 19:14:44,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:44,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240328314] [2023-04-01 19:14:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:45,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:45,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-04-01 19:14:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2023-04-01 19:14:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:46,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 507 [2023-04-01 19:14:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 28739 backedges. 0 proven. 10344 refuted. 0 times theorem prover too weak. 18395 trivial. 0 not checked. [2023-04-01 19:14:46,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:46,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240328314] [2023-04-01 19:14:46,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240328314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:46,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082661007] [2023-04-01 19:14:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:14:46,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:46,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:46,421 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 19:14:46,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process