/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/bAnd2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:07:30,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:07:30,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:07:30,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:07:30,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:07:30,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:07:30,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:07:30,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:07:30,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:07:30,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:07:30,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:07:30,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:07:30,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:07:30,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:07:30,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:07:30,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:07:30,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:07:30,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:07:30,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:07:30,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:07:30,389 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 19:07:30,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:07:30,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:07:30,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:07:30,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:07:30,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:07:30,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:07:30,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:07:30,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:07:30,428 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:07:30,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:07:30,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:07:30,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:07:30,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:07:30,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:07:30,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:07:30,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:07:30,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:07:30,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:07:30,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:07:30,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:07:30,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:07:30,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:07:30,432 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:07:30,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:07:30,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:07:30,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:07:30,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:07:30,671 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:07:30,672 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:07:30,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bAnd2.i [2023-04-01 19:07:31,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:07:31,917 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:07:31,917 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd2.i [2023-04-01 19:07:31,922 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d68e39e46/b54e32c371284ecfa1b425b2bc05f486/FLAGc478db9a7 [2023-04-01 19:07:31,934 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d68e39e46/b54e32c371284ecfa1b425b2bc05f486 [2023-04-01 19:07:31,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:07:31,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:07:31,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:07:31,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:07:31,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:07:31,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:07:31" (1/1) ... [2023-04-01 19:07:31,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cd32e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:31, skipping insertion in model container [2023-04-01 19:07:31,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:07:31" (1/1) ... [2023-04-01 19:07:31,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:07:31,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:07:32,084 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/bAnd2.i[1296,1309] [2023-04-01 19:07:32,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:07:32,095 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:07:32,113 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/bAnd2.i[1296,1309] [2023-04-01 19:07:32,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:07:32,123 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:07:32,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32 WrapperNode [2023-04-01 19:07:32,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:07:32,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:07:32,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:07:32,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:07:32,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:07:32,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:07:32,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:07:32,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:07:32,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (1/1) ... [2023-04-01 19:07:32,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:07:32,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:32,178 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 19:07:32,181 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 19:07:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:07:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:07:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:07:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-04-01 19:07:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:07:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:07:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:07:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 19:07:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 19:07:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:07:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:07:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:07:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:07:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:07:32,275 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:07:32,276 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:07:32,439 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:07:32,443 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:07:32,444 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:07:32,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:07:32 BoogieIcfgContainer [2023-04-01 19:07:32,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:07:32,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:07:32,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:07:32,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:07:32,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:07:31" (1/3) ... [2023-04-01 19:07:32,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aae158a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:07:32, skipping insertion in model container [2023-04-01 19:07:32,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:07:32" (2/3) ... [2023-04-01 19:07:32,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aae158a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:07:32, skipping insertion in model container [2023-04-01 19:07:32,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:07:32" (3/3) ... [2023-04-01 19:07:32,451 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2023-04-01 19:07:32,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:07:32,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:07:32,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:07:32,543 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;@4919b66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:07:32,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:07:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 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 19:07:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:07:32,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:32,555 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 19:07:32,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:32,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2117313564, now seen corresponding path program 1 times [2023-04-01 19:07:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:32,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743411758] [2023-04-01 19:07:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:32,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:32,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:32,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:07:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:32,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:07:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:32,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:07:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:32,855 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 19:07:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743411758] [2023-04-01 19:07:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743411758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:07:32,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:07:32,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:07:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420574965] [2023-04-01 19:07:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:07:32,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:07:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:07:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:07:32,914 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 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), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:07:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:33,031 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2023-04-01 19:07:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:07:33,035 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), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:07:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:33,041 INFO L225 Difference]: With dead ends: 60 [2023-04-01 19:07:33,041 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 19:07:33,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:07:33,047 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:33,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:07:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 19:07:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 19:07:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 19:07:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-04-01 19:07:33,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 32 [2023-04-01 19:07:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:33,093 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-04-01 19:07:33,093 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), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:07:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-04-01 19:07:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:07:33,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:33,098 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 19:07:33,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:07:33,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:33,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -111658844, now seen corresponding path program 1 times [2023-04-01 19:07:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:33,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089608294] [2023-04-01 19:07:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:07:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:07:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:07:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,349 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 19:07:33,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:33,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089608294] [2023-04-01 19:07:33,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089608294] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:33,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857745748] [2023-04-01 19:07:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:33,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:33,365 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 19:07:33,366 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 19:07:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:07:33,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:33,486 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 19:07:33,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:07:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857745748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:07:33,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:07:33,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:07:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799130562] [2023-04-01 19:07:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:07:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:07:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:07:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:07:33,496 INFO L87 Difference]: Start difference. First operand 29 states and 35 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 19:07:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:33,517 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2023-04-01 19:07:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:07:33,518 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 19:07:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:33,520 INFO L225 Difference]: With dead ends: 52 [2023-04-01 19:07:33,520 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 19:07:33,525 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 19:07:33,527 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 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 19:07:33,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:07:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 19:07:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-04-01 19:07:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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 19:07:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-04-01 19:07:33,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 32 [2023-04-01 19:07:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:33,538 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-04-01 19:07:33,538 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 19:07:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-04-01 19:07:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:07:33,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:33,540 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 19:07:33,551 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 19:07:33,749 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 19:07:33,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:33,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -641484538, now seen corresponding path program 1 times [2023-04-01 19:07:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064430965] [2023-04-01 19:07:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:33,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:07:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 19:07:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:07:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,912 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 19:07:33,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064430965] [2023-04-01 19:07:33,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064430965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539209962] [2023-04-01 19:07:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:33,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:33,917 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 19:07:33,918 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 19:07:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:33,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:07:33,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:34,005 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 19:07:34,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:07:34,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539209962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:07:34,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:07:34,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 19:07:34,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038271212] [2023-04-01 19:07:34,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:07:34,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:07:34,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:07:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:07:34,008 INFO L87 Difference]: Start difference. First operand 30 states and 36 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 19:07:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:34,027 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2023-04-01 19:07:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:07:34,028 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 19:07:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:34,030 INFO L225 Difference]: With dead ends: 55 [2023-04-01 19:07:34,030 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 19:07:34,031 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 19:07:34,033 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 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 19:07:34,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:07:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 19:07:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-04-01 19:07:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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 19:07:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-04-01 19:07:34,042 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 34 [2023-04-01 19:07:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:34,042 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-04-01 19:07:34,042 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 19:07:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-04-01 19:07:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 19:07:34,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:34,043 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 19:07:34,052 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 19:07:34,249 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 19:07:34,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:34,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2031158593, now seen corresponding path program 1 times [2023-04-01 19:07:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:34,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635557508] [2023-04-01 19:07:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:34,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:07:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:07:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:07:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,373 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 19:07:34,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635557508] [2023-04-01 19:07:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635557508] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:34,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891505053] [2023-04-01 19:07:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:34,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:34,379 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 19:07:34,381 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 19:07:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:07:34,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:34,457 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 19:07:34,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:07:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891505053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:07:34,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:07:34,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:07:34,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387574390] [2023-04-01 19:07:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:07:34,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:07:34,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:07:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:07:34,460 INFO L87 Difference]: Start difference. First operand 31 states and 37 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 19:07:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:34,469 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2023-04-01 19:07:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:07:34,470 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 19:07:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:34,470 INFO L225 Difference]: With dead ends: 49 [2023-04-01 19:07:34,470 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 19:07:34,471 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 19:07:34,471 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 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 19:07:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:07:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 19:07:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-04-01 19:07:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 19:07:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-04-01 19:07:34,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 46 [2023-04-01 19:07:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:34,478 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-04-01 19:07:34,481 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 19:07:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-04-01 19:07:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:07:34,482 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:34,482 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 19:07:34,492 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 19:07:34,692 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 19:07:34,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:34,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1813645631, now seen corresponding path program 1 times [2023-04-01 19:07:34,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:34,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125238927] [2023-04-01 19:07:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:34,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:07:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:07:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:07:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,792 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 19:07:34,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125238927] [2023-04-01 19:07:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125238927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119814360] [2023-04-01 19:07:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:34,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:34,795 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 19:07:34,797 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 19:07:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:34,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:07:34,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:34,912 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 19:07:34,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:34,958 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 19:07:34,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119814360] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:34,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:34,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:07:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462742939] [2023-04-01 19:07:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:34,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:07:34,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:07:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:07:34,962 INFO L87 Difference]: Start difference. First operand 32 states and 38 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 19:07:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:35,095 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-04-01 19:07:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:07:35,095 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 19:07:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:35,096 INFO L225 Difference]: With dead ends: 61 [2023-04-01 19:07:35,096 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 19:07:35,097 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 19:07:35,097 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:35,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:07:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 19:07:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 19:07:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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 19:07:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-04-01 19:07:35,110 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 48 [2023-04-01 19:07:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:35,111 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-04-01 19:07:35,111 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 19:07:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-04-01 19:07:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:07:35,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:35,118 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 19:07:35,126 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 19:07:35,323 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 19:07:35,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:35,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1485499621, now seen corresponding path program 2 times [2023-04-01 19:07:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88011102] [2023-04-01 19:07:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:35,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:35,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:07:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:35,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-01 19:07:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:35,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 19:07:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:35,439 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 19:07:35,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88011102] [2023-04-01 19:07:35,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88011102] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521372] [2023-04-01 19:07:35,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:07:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:35,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:35,441 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 19:07:35,443 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 19:07:35,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:07:35,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:07:35,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:07:35,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:35,579 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 19:07:35,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:35,665 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 19:07:35,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521372] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:35,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:35,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 19:07:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26500975] [2023-04-01 19:07:35,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:35,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 19:07:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 19:07:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:07:35,668 INFO L87 Difference]: Start difference. First operand 38 states and 44 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 19:07:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:35,911 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2023-04-01 19:07:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:07:35,913 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 19:07:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:35,915 INFO L225 Difference]: With dead ends: 82 [2023-04-01 19:07:35,915 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 19:07:35,916 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 19:07:35,917 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:35,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 22 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:07:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 19:07:35,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-04-01 19:07:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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 19:07:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-04-01 19:07:35,930 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 54 [2023-04-01 19:07:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:35,930 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-04-01 19:07:35,930 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 19:07:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-04-01 19:07:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 19:07:35,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:35,933 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 19:07:35,944 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 19:07:36,139 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 19:07:36,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:36,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1213292436, now seen corresponding path program 3 times [2023-04-01 19:07:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:36,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308389874] [2023-04-01 19:07:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:36,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:36,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:36,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:07:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:36,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:07:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:07:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:36,261 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 19:07:36,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308389874] [2023-04-01 19:07:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308389874] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27029893] [2023-04-01 19:07:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:07:36,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:36,263 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 19:07:36,288 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 19:07:36,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:07:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:07:36,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:07:36,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:36,385 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 19:07:36,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:36,430 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 19:07:36,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27029893] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:36,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:36,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-01 19:07:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181063631] [2023-04-01 19:07:36,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:36,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 19:07:36,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 19:07:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 19:07:36,432 INFO L87 Difference]: Start difference. First operand 55 states and 63 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 19:07:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:36,625 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2023-04-01 19:07:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:07:36,625 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 19:07:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:36,626 INFO L225 Difference]: With dead ends: 105 [2023-04-01 19:07:36,626 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 19:07:36,627 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 19:07:36,627 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:36,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 32 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:07:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 19:07:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-04-01 19:07:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 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 19:07:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2023-04-01 19:07:36,636 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 78 [2023-04-01 19:07:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:36,636 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2023-04-01 19:07:36,636 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 19:07:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2023-04-01 19:07:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 19:07:36,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:36,637 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 19:07:36,650 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 19:07:36,847 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 19:07:36,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:36,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1953110186, now seen corresponding path program 4 times [2023-04-01 19:07:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:36,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485877687] [2023-04-01 19:07:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:36,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:37,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:07:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:37,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-04-01 19:07:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 19:07:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:37,192 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 19:07:37,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:37,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485877687] [2023-04-01 19:07:37,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485877687] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:37,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613334239] [2023-04-01 19:07:37,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:07:37,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:37,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:37,194 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 19:07:37,197 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 19:07:37,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:07:37,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:07:37,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:07:37,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:37,359 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 19:07:37,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:37,572 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 19:07:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613334239] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:37,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:37,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 19:07:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766057985] [2023-04-01 19:07:37,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:37,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:07:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:07:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:07:37,575 INFO L87 Difference]: Start difference. First operand 77 states and 93 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 19:07:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:38,034 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2023-04-01 19:07:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:07:38,034 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 19:07:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:38,035 INFO L225 Difference]: With dead ends: 151 [2023-04-01 19:07:38,035 INFO L226 Difference]: Without dead ends: 101 [2023-04-01 19:07:38,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 19:07:38,037 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:38,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 32 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:07:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-01 19:07:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-04-01 19:07:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 93 states have internal predecessors, (108), 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 19:07:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2023-04-01 19:07:38,047 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 128 [2023-04-01 19:07:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:38,048 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2023-04-01 19:07:38,048 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 19:07:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2023-04-01 19:07:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 19:07:38,057 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:38,057 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 19:07:38,066 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 19:07:38,263 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 19:07:38,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:38,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -948106514, now seen corresponding path program 5 times [2023-04-01 19:07:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:38,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770669701] [2023-04-01 19:07:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:38,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:38,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:07:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-04-01 19:07:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:38,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-04-01 19:07:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:38,896 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 19:07:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770669701] [2023-04-01 19:07:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770669701] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926957884] [2023-04-01 19:07:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:07:38,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:38,901 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 19:07:38,925 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 19:07:40,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-04-01 19:07:40,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:07:40,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:07:40,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:40,616 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 19:07:40,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:40,792 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 19:07:40,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926957884] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:40,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:40,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-04-01 19:07:40,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318072489] [2023-04-01 19:07:40,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:07:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:07:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:07:40,795 INFO L87 Difference]: Start difference. First operand 101 states and 117 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 19:07:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:41,694 INFO L93 Difference]: Finished difference Result 194 states and 253 transitions. [2023-04-01 19:07:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 19:07:41,694 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 19:07:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:41,695 INFO L225 Difference]: With dead ends: 194 [2023-04-01 19:07:41,695 INFO L226 Difference]: Without dead ends: 144 [2023-04-01 19:07:41,698 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 19:07:41,699 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 271 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:41,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 37 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:07:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-04-01 19:07:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2023-04-01 19:07:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 135 states have internal predecessors, (166), 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 19:07:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2023-04-01 19:07:41,714 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 152 [2023-04-01 19:07:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:41,714 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2023-04-01 19:07:41,714 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 19:07:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2023-04-01 19:07:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 19:07:41,717 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:41,717 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 19:07:41,728 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 19:07:41,927 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 19:07:41,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:41,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -222844632, now seen corresponding path program 6 times [2023-04-01 19:07:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:41,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135122706] [2023-04-01 19:07:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:42,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:07:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-04-01 19:07:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:42,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 19:07:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:42,751 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 19:07:42,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135122706] [2023-04-01 19:07:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135122706] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466919852] [2023-04-01 19:07:42,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:07:42,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:42,753 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 19:07:42,756 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 19:07:42,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-01 19:07:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:07:42,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:07:42,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:42,945 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 19:07:42,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:43,030 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 19:07:43,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466919852] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:43,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:43,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2023-04-01 19:07:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908535794] [2023-04-01 19:07:43,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:43,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:07:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:07:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:07:43,035 INFO L87 Difference]: Start difference. First operand 143 states and 175 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 19:07:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:43,627 INFO L93 Difference]: Finished difference Result 244 states and 312 transitions. [2023-04-01 19:07:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 19:07:43,628 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 19:07:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:43,629 INFO L225 Difference]: With dead ends: 244 [2023-04-01 19:07:43,629 INFO L226 Difference]: Without dead ends: 154 [2023-04-01 19:07:43,631 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 19:07:43,631 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:43,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 22 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:07:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-01 19:07:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2023-04-01 19:07:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 145 states have (on average 1.2137931034482758) internal successors, (176), 145 states have internal predecessors, (176), 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 19:07:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 185 transitions. [2023-04-01 19:07:43,640 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 185 transitions. Word has length 250 [2023-04-01 19:07:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:43,640 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 185 transitions. [2023-04-01 19:07:43,641 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 19:07:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 185 transitions. [2023-04-01 19:07:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 19:07:43,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:43,643 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 19:07:43,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 19:07:43,849 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 19:07:43,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:43,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1826131966, now seen corresponding path program 7 times [2023-04-01 19:07:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765701594] [2023-04-01 19:07:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:44,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:44,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:07:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 19:07:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:44,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-04-01 19:07:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:44,649 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 19:07:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765701594] [2023-04-01 19:07:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765701594] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059511149] [2023-04-01 19:07:44,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:07:44,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:44,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:44,653 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 19:07:44,656 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 19:07:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:44,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 19:07:44,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:44,937 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 19:07:44,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:45,712 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 19:07:45,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059511149] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:45,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:45,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2023-04-01 19:07:45,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449463769] [2023-04-01 19:07:45,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:45,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-04-01 19:07:45,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:45,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-04-01 19:07:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 19:07:45,716 INFO L87 Difference]: Start difference. First operand 153 states and 185 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 19:07:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:46,965 INFO L93 Difference]: Finished difference Result 303 states and 392 transitions. [2023-04-01 19:07:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 19:07:46,966 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 19:07:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:46,967 INFO L225 Difference]: With dead ends: 303 [2023-04-01 19:07:46,967 INFO L226 Difference]: Without dead ends: 205 [2023-04-01 19:07:46,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 19:07:46,971 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 128 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:07:46,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 32 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:07:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-04-01 19:07:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-04-01 19:07:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 197 states have (on average 1.1573604060913705) internal successors, (228), 197 states have internal predecessors, (228), 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 19:07:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 237 transitions. [2023-04-01 19:07:46,981 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 237 transitions. Word has length 260 [2023-04-01 19:07:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:46,981 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 237 transitions. [2023-04-01 19:07:46,981 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 19:07:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 237 transitions. [2023-04-01 19:07:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-04-01 19:07:46,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:46,985 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 19:07:46,993 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 19:07:47,192 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 19:07:47,192 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:47,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash 323321206, now seen corresponding path program 8 times [2023-04-01 19:07:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82654672] [2023-04-01 19:07:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:49,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:07:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:49,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 19:07:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:49,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-04-01 19:07:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:49,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 19:07:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:07:49,332 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 19:07:49,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:07:49,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82654672] [2023-04-01 19:07:49,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82654672] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:07:49,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135027464] [2023-04-01 19:07:49,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:07:49,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:07:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:07:49,337 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 19:07:49,345 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 19:07:49,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:07:49,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:07:49,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 19:07:49,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:07:49,751 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 19:07:49,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:07:52,348 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 19:07:52,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135027464] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:07:52,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:07:52,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2023-04-01 19:07:52,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431159939] [2023-04-01 19:07:52,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:07:52,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-04-01 19:07:52,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:07:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-04-01 19:07:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 19:07:52,355 INFO L87 Difference]: Start difference. First operand 205 states and 237 transitions. Second operand has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 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 19:07:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:07:56,143 INFO L93 Difference]: Finished difference Result 407 states and 522 transitions. [2023-04-01 19:07:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-04-01 19:07:56,144 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 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 19:07:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:07:56,145 INFO L225 Difference]: With dead ends: 407 [2023-04-01 19:07:56,145 INFO L226 Difference]: Without dead ends: 309 [2023-04-01 19:07:56,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2023-04-01 19:07:56,152 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 232 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 42 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 19:07:56,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 42 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:07:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-04-01 19:07:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2023-04-01 19:07:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 301 states have (on average 1.1029900332225913) internal successors, (332), 301 states have internal predecessors, (332), 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 19:07:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 341 transitions. [2023-04-01 19:07:56,165 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 341 transitions. Word has length 312 [2023-04-01 19:07:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:07:56,166 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 341 transitions. [2023-04-01 19:07:56,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 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 19:07:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 341 transitions. [2023-04-01 19:07:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2023-04-01 19:07:56,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:07:56,172 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 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 19:07:56,180 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 19:07:56,380 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 19:07:56,380 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:07:56,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:07:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1893360222, now seen corresponding path program 9 times [2023-04-01 19:07:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:07:56,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424576658] [2023-04-01 19:07:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:07:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:07:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:03,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:08:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:03,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2023-04-01 19:08:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:03,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 19:08:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:03,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 351 [2023-04-01 19:08:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:08:03,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:08:03,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424576658] [2023-04-01 19:08:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424576658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:08:03,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541622441] [2023-04-01 19:08:03,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:08:03,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:08:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:08:03,077 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 19:08:03,101 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 19:08:03,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 19:08:03,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:08:03,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:08:03,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:08:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2023-04-01 19:08:03,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:08:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2023-04-01 19:08:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541622441] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:08:04,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:08:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 9, 9] total 120 [2023-04-01 19:08:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458665464] [2023-04-01 19:08:04,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:08:04,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2023-04-01 19:08:04,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:08:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2023-04-01 19:08:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 19:08:04,116 INFO L87 Difference]: Start difference. First operand 309 states and 341 transitions. Second operand has 120 states, 120 states have (on average 2.225) internal successors, (267), 119 states have internal predecessors, (267), 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 19:08:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:08:09,378 INFO L93 Difference]: Finished difference Result 426 states and 498 transitions. [2023-04-01 19:08:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-04-01 19:08:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.225) internal successors, (267), 119 states have internal predecessors, (267), 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 416 [2023-04-01 19:08:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:08:09,380 INFO L225 Difference]: With dead ends: 426 [2023-04-01 19:08:09,380 INFO L226 Difference]: Without dead ends: 328 [2023-04-01 19:08:09,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8949 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=16737, Invalid=39195, Unknown=0, NotChecked=0, Total=55932 [2023-04-01 19:08:09,386 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 263 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:08:09,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 42 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:08:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-04-01 19:08:09,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2023-04-01 19:08:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 319 states have (on average 1.09717868338558) internal successors, (350), 319 states have internal predecessors, (350), 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 19:08:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 359 transitions. [2023-04-01 19:08:09,399 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 359 transitions. Word has length 416 [2023-04-01 19:08:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:08:09,400 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 359 transitions. [2023-04-01 19:08:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.225) internal successors, (267), 119 states have internal predecessors, (267), 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 19:08:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 359 transitions. [2023-04-01 19:08:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-04-01 19:08:09,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:08:09,403 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 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 19:08:09,413 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 19:08:09,610 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 19:08:09,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:08:09,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:08:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1022032048, now seen corresponding path program 10 times [2023-04-01 19:08:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:08:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470739871] [2023-04-01 19:08:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:08:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:08:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:15,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:08:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:15,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2023-04-01 19:08:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:15,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2023-04-01 19:08:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:15,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 369 [2023-04-01 19:08:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:08:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:08:15,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:08:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470739871] [2023-04-01 19:08:15,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470739871] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:08:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950308730] [2023-04-01 19:08:15,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:08:15,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:08:15,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:08:15,689 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 19:08:15,695 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 19:08:16,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:08:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:08:16,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 105 conjunts are in the unsatisfiable core [2023-04-01 19:08:16,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:08:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:08:16,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:08:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:08:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950308730] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:08:26,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:08:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2023-04-01 19:08:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161371254] [2023-04-01 19:08:26,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:08:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2023-04-01 19:08:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:08:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2023-04-01 19:08:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2023-04-01 19:08:26,610 INFO L87 Difference]: Start difference. First operand 327 states and 359 transitions. Second operand has 212 states, 212 states have (on average 2.108490566037736) internal successors, (447), 211 states have internal predecessors, (447), 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 19:08:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:08:40,997 INFO L93 Difference]: Finished difference Result 651 states and 819 transitions. [2023-04-01 19:08:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-04-01 19:08:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.108490566037736) internal successors, (447), 211 states have internal predecessors, (447), 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 434 [2023-04-01 19:08:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:08:41,000 INFO L225 Difference]: With dead ends: 651 [2023-04-01 19:08:41,000 INFO L226 Difference]: Without dead ends: 537 [2023-04-01 19:08:41,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27502 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=66046, Invalid=109934, Unknown=0, NotChecked=0, Total=175980 [2023-04-01 19:08:41,012 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 444 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:08:41,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 27 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:08:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-04-01 19:08:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2023-04-01 19:08:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 529 states have (on average 1.0586011342155008) internal successors, (560), 529 states have internal predecessors, (560), 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 19:08:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 569 transitions. [2023-04-01 19:08:41,033 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 569 transitions. Word has length 434 [2023-04-01 19:08:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:08:41,033 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 569 transitions. [2023-04-01 19:08:41,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.108490566037736) internal successors, (447), 211 states have internal predecessors, (447), 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 19:08:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 569 transitions. [2023-04-01 19:08:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-04-01 19:08:41,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:08:41,038 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 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 19:08:41,049 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 19:08:41,247 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 19:08:41,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:08:41,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:08:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1706201502, now seen corresponding path program 11 times [2023-04-01 19:08:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:08:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790763969] [2023-04-01 19:08:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:08:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:08:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:09:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:09:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:09:04,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2023-04-01 19:09:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:09:04,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2023-04-01 19:09:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:09:04,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2023-04-01 19:09:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:09:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:09:04,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:09:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790763969] [2023-04-01 19:09:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790763969] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:09:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354780419] [2023-04-01 19:09:04,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:09:04,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:09:04,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:09:04,192 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 19:09:04,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process