/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-examples/standard_strcpy_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:35:58,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:35:58,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:35:58,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:35:58,305 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 18:35:58,339 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:35:58,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:35:58,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:35:58,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:35:58,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:35:58,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:35:58,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:35:58,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:35:58,343 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:35:58,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:35:58,344 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:35:58,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:35:58,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:35:58,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:35:58,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:35:58,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:35:58,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:35:58,345 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:35:58,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:35:58,345 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:35:58,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:35:58,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:35:58,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:35:58,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:35:58,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:35:58,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:35:58,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:35:58,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:35:58,348 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:35:58,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:35:58,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:35:58,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:35:58,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:35:58,640 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:35:58,640 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:35:58,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-04-01 18:35:59,812 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:35:59,986 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:35:59,986 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-04-01 18:35:59,991 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa6a2aa9/8ae8eb2d785a4e1295809e590e88ed18/FLAG331e7dbf8 [2023-04-01 18:36:00,005 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa6a2aa9/8ae8eb2d785a4e1295809e590e88ed18 [2023-04-01 18:36:00,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:36:00,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:36:00,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:36:00,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:36:00,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:36:00,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3905d79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00, skipping insertion in model container [2023-04-01 18:36:00,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:36:00,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:36:00,203 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-examples/standard_strcpy_ground-1.i[853,866] [2023-04-01 18:36:00,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:36:00,235 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:36:00,248 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-examples/standard_strcpy_ground-1.i[853,866] [2023-04-01 18:36:00,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:36:00,278 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:36:00,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00 WrapperNode [2023-04-01 18:36:00,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:36:00,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:36:00,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:36:00,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:36:00,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:36:00,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:36:00,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:36:00,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:36:00,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (1/1) ... [2023-04-01 18:36:00,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:36:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:00,359 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 18:36:00,365 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 18:36:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:36:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:36:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:36:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:36:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:36:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:36:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:36:00,455 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:36:00,457 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:36:00,669 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:36:00,674 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:36:00,674 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:36:00,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:36:00 BoogieIcfgContainer [2023-04-01 18:36:00,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:36:00,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:36:00,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:36:00,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:36:00,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:36:00" (1/3) ... [2023-04-01 18:36:00,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ba9af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:36:00, skipping insertion in model container [2023-04-01 18:36:00,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:00" (2/3) ... [2023-04-01 18:36:00,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ba9af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:36:00, skipping insertion in model container [2023-04-01 18:36:00,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:36:00" (3/3) ... [2023-04-01 18:36:00,699 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2023-04-01 18:36:00,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:36:00,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:36:00,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:36:00,761 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;@368ab81d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:36:00,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:36:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 18:36:00,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:00,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:00,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:00,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1147964755, now seen corresponding path program 1 times [2023-04-01 18:36:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:00,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499493668] [2023-04-01 18:36:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:00,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499493668] [2023-04-01 18:36:00,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499493668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:36:00,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:36:00,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:36:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370803958] [2023-04-01 18:36:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:36:00,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:36:00,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:01,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:36:01,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:36:01,021 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:01,088 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-04-01 18:36:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:36:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 18:36:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:01,095 INFO L225 Difference]: With dead ends: 45 [2023-04-01 18:36:01,096 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 18:36:01,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:36:01,101 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:01,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:36:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 18:36:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 18:36:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-01 18:36:01,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-04-01 18:36:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:01,145 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-01 18:36:01,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-01 18:36:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:36:01,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:01,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:36:01,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:01,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash -840421782, now seen corresponding path program 1 times [2023-04-01 18:36:01,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:01,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146347393] [2023-04-01 18:36:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:01,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:01,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146347393] [2023-04-01 18:36:01,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146347393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:36:01,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:36:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:36:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378697431] [2023-04-01 18:36:01,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:36:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:36:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:36:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:36:01,290 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:01,376 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-04-01 18:36:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:36:01,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:36:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:01,378 INFO L225 Difference]: With dead ends: 36 [2023-04-01 18:36:01,378 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 18:36:01,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:36:01,380 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:01,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:36:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 18:36:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 18:36:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-01 18:36:01,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2023-04-01 18:36:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:01,387 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-01 18:36:01,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-01 18:36:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 18:36:01,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:01,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:01,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:36:01,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:01,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash 164108610, now seen corresponding path program 1 times [2023-04-01 18:36:01,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:01,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139279023] [2023-04-01 18:36:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:01,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:01,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:01,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139279023] [2023-04-01 18:36:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139279023] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:01,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623517641] [2023-04-01 18:36:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:01,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:01,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:01,517 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 18:36:01,520 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 18:36:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:01,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:36:01,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:01,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:01,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623517641] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:01,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:01,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:36:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227880436] [2023-04-01 18:36:01,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:01,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:36:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:36:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:36:01,727 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:01,884 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-04-01 18:36:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:36:01,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 18:36:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:01,887 INFO L225 Difference]: With dead ends: 39 [2023-04-01 18:36:01,888 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 18:36:01,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 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 18:36:01,891 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:01,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:36:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 18:36:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 18:36:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 18:36:01,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2023-04-01 18:36:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:01,901 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 18:36:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 18:36:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:36:01,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:01,902 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:01,915 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 18:36:02,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:02,110 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:02,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1141365654, now seen corresponding path program 2 times [2023-04-01 18:36:02,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641270584] [2023-04-01 18:36:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:02,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 18:36:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:02,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641270584] [2023-04-01 18:36:02,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641270584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:36:02,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:36:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:36:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476149265] [2023-04-01 18:36:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:36:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:36:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:36:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:36:02,215 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:02,275 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-04-01 18:36:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:36:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 18:36:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:02,277 INFO L225 Difference]: With dead ends: 40 [2023-04-01 18:36:02,277 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 18:36:02,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:36:02,278 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:02,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:36:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 18:36:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 18:36:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 18:36:02,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2023-04-01 18:36:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:02,285 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 18:36:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 18:36:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 18:36:02,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:02,285 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:02,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:36:02,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:02,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -530861361, now seen corresponding path program 1 times [2023-04-01 18:36:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930432892] [2023-04-01 18:36:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:02,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:02,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930432892] [2023-04-01 18:36:02,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930432892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:02,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734016098] [2023-04-01 18:36:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:02,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:02,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:02,428 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 18:36:02,430 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 18:36:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:02,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:36:02,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:02,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734016098] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:02,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:02,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:36:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420651771] [2023-04-01 18:36:02,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:02,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:36:02,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:36:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:36:02,591 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:02,795 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-04-01 18:36:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:36:02,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-01 18:36:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:02,796 INFO L225 Difference]: With dead ends: 51 [2023-04-01 18:36:02,796 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 18:36:02,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:36:02,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:02,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:36:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 18:36:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 18:36:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-04-01 18:36:02,804 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2023-04-01 18:36:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:02,805 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-04-01 18:36:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-04-01 18:36:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:36:02,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:02,806 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:02,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 18:36:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:03,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:03,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:03,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1849082319, now seen corresponding path program 2 times [2023-04-01 18:36:03,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:03,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552565749] [2023-04-01 18:36:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:03,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:03,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:03,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:03,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552565749] [2023-04-01 18:36:03,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552565749] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:03,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095551588] [2023-04-01 18:36:03,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:36:03,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:03,249 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 18:36:03,252 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 18:36:03,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:36:03,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:36:03,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:36:03,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:03,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:03,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095551588] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:03,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:03,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:36:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519149628] [2023-04-01 18:36:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:36:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:36:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:36:03,592 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:04,011 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2023-04-01 18:36:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:36:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-01 18:36:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:04,014 INFO L225 Difference]: With dead ends: 63 [2023-04-01 18:36:04,014 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 18:36:04,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 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 18:36:04,017 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:04,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:36:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 18:36:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-01 18:36:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-04-01 18:36:04,031 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 29 [2023-04-01 18:36:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:04,031 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-04-01 18:36:04,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-04-01 18:36:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 18:36:04,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:04,033 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:04,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:36:04,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:04,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:04,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1274601521, now seen corresponding path program 3 times [2023-04-01 18:36:04,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:04,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678720399] [2023-04-01 18:36:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:04,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:36:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:04,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678720399] [2023-04-01 18:36:04,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678720399] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:04,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242018786] [2023-04-01 18:36:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:36:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:04,912 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 18:36:04,916 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 18:36:04,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:36:04,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:36:04,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 18:36:05,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:05,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 18:36:05,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 18:36:05,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 18:36:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 18:36:05,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:05,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:36:05,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2023-04-01 18:36:05,624 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-04-01 18:36:05,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 72 [2023-04-01 18:36:05,662 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:36:05,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 18:36:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 18:36:05,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242018786] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:05,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8, 8] total 37 [2023-04-01 18:36:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972923721] [2023-04-01 18:36:05,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:05,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 18:36:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 18:36:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 18:36:05,889 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 37 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 34 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:06,861 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-04-01 18:36:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 18:36:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 34 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 18:36:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:06,862 INFO L225 Difference]: With dead ends: 72 [2023-04-01 18:36:06,862 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 18:36:06,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1044, Invalid=3378, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 18:36:06,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:06,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 69 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:36:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 18:36:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-04-01 18:36:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-04-01 18:36:06,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2023-04-01 18:36:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:06,882 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-04-01 18:36:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 34 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-04-01 18:36:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 18:36:06,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:06,885 INFO L195 NwaCegarLoop]: trace histogram [23, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:06,896 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 18:36:07,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:07,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:07,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash 251865425, now seen corresponding path program 1 times [2023-04-01 18:36:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:07,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165640670] [2023-04-01 18:36:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:07,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 18:36:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:36:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165640670] [2023-04-01 18:36:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165640670] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034198976] [2023-04-01 18:36:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:07,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:07,704 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 18:36:07,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:36:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:07,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:36:07,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:36:07,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:36:08,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034198976] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:08,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:08,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2023-04-01 18:36:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24338900] [2023-04-01 18:36:08,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:08,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:36:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:36:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:36:08,692 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 51 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:36:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:09,888 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2023-04-01 18:36:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 18:36:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 51 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2023-04-01 18:36:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:09,890 INFO L225 Difference]: With dead ends: 101 [2023-04-01 18:36:09,890 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 18:36:09,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 18:36:09,894 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:09,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 42 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:36:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 18:36:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-01 18:36:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-01 18:36:09,914 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 50 [2023-04-01 18:36:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:09,914 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-01 18:36:09,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 51 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:36:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-01 18:36:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 18:36:09,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:09,915 INFO L195 NwaCegarLoop]: trace histogram [48, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:09,925 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 18:36:10,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:10,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:10,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash 563681833, now seen corresponding path program 2 times [2023-04-01 18:36:10,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:10,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163499800] [2023-04-01 18:36:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:10,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:12,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:12,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 18:36:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:36:12,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:12,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163499800] [2023-04-01 18:36:12,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163499800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:12,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272268038] [2023-04-01 18:36:12,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:36:12,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:12,053 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 18:36:12,078 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 18:36:12,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:36:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:36:12,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:36:12,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:36:12,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:36:14,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272268038] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:14,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:14,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:36:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304845360] [2023-04-01 18:36:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:14,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:36:14,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:36:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:36:14,840 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 102 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 101 states have internal predecessors, (121), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:36:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:18,440 INFO L93 Difference]: Finished difference Result 151 states and 208 transitions. [2023-04-01 18:36:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:36:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 101 states have internal predecessors, (121), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2023-04-01 18:36:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:18,444 INFO L225 Difference]: With dead ends: 151 [2023-04-01 18:36:18,444 INFO L226 Difference]: Without dead ends: 128 [2023-04-01 18:36:18,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:36:18,455 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:18,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 32 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:36:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-04-01 18:36:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-04-01 18:36:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 121 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2023-04-01 18:36:18,482 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 75 [2023-04-01 18:36:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:18,482 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2023-04-01 18:36:18,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 101 states have internal predecessors, (121), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:36:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2023-04-01 18:36:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 18:36:18,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:18,484 INFO L195 NwaCegarLoop]: trace histogram [98, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:18,492 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 18:36:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:18,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:18,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1250580265, now seen corresponding path program 3 times [2023-04-01 18:36:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049382809] [2023-04-01 18:36:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:24,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:24,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-04-01 18:36:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 2 proven. 4851 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:36:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049382809] [2023-04-01 18:36:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049382809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643238025] [2023-04-01 18:36:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:36:24,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:24,509 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 18:36:24,534 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 18:36:24,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:36:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:36:24,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 18:36:24,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-01 18:36:24,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-01 18:36:25,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643238025] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:25,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:25,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 6, 6] total 108 [2023-04-01 18:36:25,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082449774] [2023-04-01 18:36:25,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:25,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-04-01 18:36:25,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-04-01 18:36:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=6484, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 18:36:25,257 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 108 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 107 states have internal predecessors, (136), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:36:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:29,908 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2023-04-01 18:36:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-04-01 18:36:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 107 states have internal predecessors, (136), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 125 [2023-04-01 18:36:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:29,914 INFO L225 Difference]: With dead ends: 161 [2023-04-01 18:36:29,914 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 18:36:29,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6245 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=15593, Invalid=28717, Unknown=0, NotChecked=0, Total=44310 [2023-04-01 18:36:29,919 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 132 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:29,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 57 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:36:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 18:36:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-04-01 18:36:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 125 states have internal predecessors, (130), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2023-04-01 18:36:29,938 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 125 [2023-04-01 18:36:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:29,938 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2023-04-01 18:36:29,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 107 states have internal predecessors, (136), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:36:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2023-04-01 18:36:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-01 18:36:29,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:29,940 INFO L195 NwaCegarLoop]: trace histogram [99, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:29,949 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 18:36:30,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:30,149 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:30,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash -198792068, now seen corresponding path program 4 times [2023-04-01 18:36:30,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:30,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964602511] [2023-04-01 18:36:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:35,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 18:36:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 2 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:36:35,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964602511] [2023-04-01 18:36:35,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964602511] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979082072] [2023-04-01 18:36:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:36:35,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:35,385 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 18:36:35,387 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 18:36:35,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:36:35,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:36:35,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 18:36:35,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:36:35,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 2 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:36:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979082072] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:45,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:45,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2023-04-01 18:36:45,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59356672] [2023-04-01 18:36:45,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2023-04-01 18:36:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2023-04-01 18:36:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2023-04-01 18:36:45,023 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 204 states, 204 states have (on average 1.0931372549019607) internal successors, (223), 203 states have internal predecessors, (223), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:36:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:58,370 INFO L93 Difference]: Finished difference Result 259 states and 369 transitions. [2023-04-01 18:36:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-04-01 18:36:58,371 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.0931372549019607) internal successors, (223), 203 states have internal predecessors, (223), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2023-04-01 18:36:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:58,372 INFO L225 Difference]: With dead ends: 259 [2023-04-01 18:36:58,372 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 18:36:58,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2023-04-01 18:36:58,382 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 218 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:58,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 32 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:36:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 18:36:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2023-04-01 18:36:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 225 states have (on average 1.0266666666666666) internal successors, (231), 226 states have internal predecessors, (231), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 238 transitions. [2023-04-01 18:36:58,410 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 238 transitions. Word has length 129 [2023-04-01 18:36:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:58,411 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 238 transitions. [2023-04-01 18:36:58,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.0931372549019607) internal successors, (223), 203 states have internal predecessors, (223), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:36:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 238 transitions. [2023-04-01 18:36:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 18:36:58,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:58,414 INFO L195 NwaCegarLoop]: trace histogram [200, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:58,421 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 18:36:58,621 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,SelfDestructingSolverStorable10 [2023-04-01 18:36:58,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:58,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -637767004, now seen corresponding path program 5 times [2023-04-01 18:36:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258209421] [2023-04-01 18:36:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:17,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:37:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:17,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2023-04-01 18:37:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20113 backedges. 2 proven. 20100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:37:17,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:37:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258209421] [2023-04-01 18:37:17,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258209421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:37:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099368803] [2023-04-01 18:37:17,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:37:17,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:37:17,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:37:17,658 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 18:37:17,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process