./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-lit/bh2017-ex3.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-lit/bh2017-ex3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67c3f42f5641e6993fb8445c2fa4fe121d859872ed17b178229098422831f110 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 22:59:24,354 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 22:59:24,421 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 22:59:24,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 22:59:24,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 22:59:24,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 22:59:24,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 22:59:24,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 22:59:24,453 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 22:59:24,456 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 22:59:24,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 22:59:24,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 22:59:24,457 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 22:59:24,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 22:59:24,458 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 22:59:24,459 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 22:59:24,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 22:59:24,459 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 22:59:24,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 22:59:24,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 22:59:24,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 22:59:24,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 22:59:24,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 22:59:24,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 22:59:24,461 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 22:59:24,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 22:59:24,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 22:59:24,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 22:59:24,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 22:59:24,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 22:59:24,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 22:59:24,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:59:24,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 22:59:24,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 22:59:24,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 22:59:24,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 22:59:24,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 22:59:24,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 22:59:24,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 22:59:24,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 22:59:24,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 22:59:24,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 22:59:24,466 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67c3f42f5641e6993fb8445c2fa4fe121d859872ed17b178229098422831f110 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 22:59:24,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 22:59:24,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 22:59:24,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 22:59:24,697 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 22:59:24,697 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 22:59:24,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bh2017-ex3.i [2023-11-22 22:59:25,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 22:59:25,884 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 22:59:25,885 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bh2017-ex3.i [2023-11-22 22:59:25,890 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7a9d6db/2bd90fc6be904417afbad9b601645bc7/FLAG802d20a34 [2023-11-22 22:59:25,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7a9d6db/2bd90fc6be904417afbad9b601645bc7 [2023-11-22 22:59:25,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 22:59:25,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 22:59:25,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 22:59:25,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 22:59:25,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 22:59:25,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:59:25" (1/1) ... [2023-11-22 22:59:25,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e79210e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:25, skipping insertion in model container [2023-11-22 22:59:25,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:59:25" (1/1) ... [2023-11-22 22:59:25,927 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 22:59:26,041 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bh2017-ex3.i[799,812] [2023-11-22 22:59:26,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:59:26,064 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 22:59:26,075 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bh2017-ex3.i[799,812] [2023-11-22 22:59:26,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:59:26,089 INFO L206 MainTranslator]: Completed translation [2023-11-22 22:59:26,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26 WrapperNode [2023-11-22 22:59:26,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 22:59:26,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 22:59:26,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 22:59:26,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 22:59:26,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,115 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-22 22:59:26,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 22:59:26,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 22:59:26,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 22:59:26,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 22:59:26,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,125 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 22:59:26,137 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 22:59:26,137 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 22:59:26,138 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 22:59:26,138 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (1/1) ... [2023-11-22 22:59:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:59:26,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:59:26,164 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) [2023-11-22 22:59:26,172 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 [2023-11-22 22:59:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 22:59:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 22:59:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 22:59:26,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 22:59:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 22:59:26,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 22:59:26,243 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 22:59:26,245 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 22:59:26,335 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 22:59:26,351 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 22:59:26,364 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 22:59:26,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:59:26 BoogieIcfgContainer [2023-11-22 22:59:26,365 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 22:59:26,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 22:59:26,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 22:59:26,369 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 22:59:26,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:59:25" (1/3) ... [2023-11-22 22:59:26,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2329a0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:59:26, skipping insertion in model container [2023-11-22 22:59:26,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:59:26" (2/3) ... [2023-11-22 22:59:26,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2329a0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:59:26, skipping insertion in model container [2023-11-22 22:59:26,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:59:26" (3/3) ... [2023-11-22 22:59:26,371 INFO L112 eAbstractionObserver]: Analyzing ICFG bh2017-ex3.i [2023-11-22 22:59:26,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 22:59:26,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 22:59:26,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 22:59:26,438 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=LoopHeads, 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;@1892486, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 22:59:26,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 22:59:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 22:59:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-22 22:59:26,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:26,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 22:59:26,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:26,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1248097640, now seen corresponding path program 1 times [2023-11-22 22:59:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321075347] [2023-11-22 22:59:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:26,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:59:26,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:26,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321075347] [2023-11-22 22:59:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321075347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:59:26,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:59:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 22:59:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997004848] [2023-11-22 22:59:26,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:59:26,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 22:59:26,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 22:59:26,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 22:59:26,677 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:59:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:26,745 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2023-11-22 22:59:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 22:59:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-22 22:59:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:26,752 INFO L225 Difference]: With dead ends: 45 [2023-11-22 22:59:26,752 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 22:59:26,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:59:26,757 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:26,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 68 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 22:59:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 22:59:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 22:59:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-22 22:59:26,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 6 [2023-11-22 22:59:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:26,797 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-22 22:59:26,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:59:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-22 22:59:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-22 22:59:26,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:26,798 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:59:26,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 22:59:26,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:26,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash 675454336, now seen corresponding path program 1 times [2023-11-22 22:59:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:26,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390809322] [2023-11-22 22:59:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:59:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390809322] [2023-11-22 22:59:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390809322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:59:26,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:59:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 22:59:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437842119] [2023-11-22 22:59:26,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:59:26,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 22:59:26,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 22:59:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 22:59:26,946 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 22:59:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:26,990 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-22 22:59:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 22:59:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-22 22:59:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:26,993 INFO L225 Difference]: With dead ends: 30 [2023-11-22 22:59:26,993 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 22:59:26,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:59:26,994 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:26,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 22:59:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-22 22:59:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 22:59:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-22 22:59:26,999 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2023-11-22 22:59:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:26,999 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-22 22:59:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 22:59:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-22 22:59:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 22:59:27,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:27,000 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:59:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 22:59:27,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:27,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 715879520, now seen corresponding path program 1 times [2023-11-22 22:59:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:27,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494717742] [2023-11-22 22:59:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:59:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:59:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:27,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494717742] [2023-11-22 22:59:27,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494717742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:59:27,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:59:27,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:59:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474014642] [2023-11-22 22:59:27,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:59:27,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:59:27,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:59:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:59:27,093 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 22:59:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:27,102 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-22 22:59:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:59:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-22 22:59:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:27,103 INFO L225 Difference]: With dead ends: 66 [2023-11-22 22:59:27,103 INFO L226 Difference]: Without dead ends: 39 [2023-11-22 22:59:27,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:59:27,104 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:27,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-22 22:59:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-22 22:59:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-22 22:59:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2023-11-22 22:59:27,111 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 20 [2023-11-22 22:59:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:27,111 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2023-11-22 22:59:27,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 22:59:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2023-11-22 22:59:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 22:59:27,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:27,112 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:59:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 22:59:27,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:27,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1791028434, now seen corresponding path program 1 times [2023-11-22 22:59:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620266291] [2023-11-22 22:59:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:59:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:59:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:27,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620266291] [2023-11-22 22:59:27,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620266291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:59:27,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:59:27,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:59:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960069560] [2023-11-22 22:59:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:59:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:59:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:59:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:59:27,146 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 22:59:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:27,158 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2023-11-22 22:59:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:59:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-22 22:59:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:27,159 INFO L225 Difference]: With dead ends: 97 [2023-11-22 22:59:27,159 INFO L226 Difference]: Without dead ends: 59 [2023-11-22 22:59:27,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:59:27,161 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:27,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-22 22:59:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-22 22:59:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-22 22:59:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2023-11-22 22:59:27,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 20 [2023-11-22 22:59:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:27,170 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2023-11-22 22:59:27,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 22:59:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2023-11-22 22:59:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 22:59:27,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:27,171 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 22:59:27,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 22:59:27,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:27,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1325115391, now seen corresponding path program 1 times [2023-11-22 22:59:27,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:27,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501396719] [2023-11-22 22:59:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:27,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:59:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 22:59:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 22:59:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:59:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501396719] [2023-11-22 22:59:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501396719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:59:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463519852] [2023-11-22 22:59:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:27,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:59:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:59:27,224 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) [2023-11-22 22:59:27,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 22:59:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 22:59:27,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:59:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:59:27,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:59:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:59:27,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463519852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:59:27,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:59:27,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-22 22:59:27,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140311760] [2023-11-22 22:59:27,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:59:27,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 22:59:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 22:59:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:59:27,390 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-22 22:59:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:27,458 INFO L93 Difference]: Finished difference Result 177 states and 269 transitions. [2023-11-22 22:59:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 22:59:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 35 [2023-11-22 22:59:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:27,462 INFO L225 Difference]: With dead ends: 177 [2023-11-22 22:59:27,462 INFO L226 Difference]: Without dead ends: 119 [2023-11-22 22:59:27,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:59:27,463 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:27,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:59:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-22 22:59:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-22 22:59:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 88 states have internal predecessors, (126), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-22 22:59:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 180 transitions. [2023-11-22 22:59:27,477 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 180 transitions. Word has length 35 [2023-11-22 22:59:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:27,477 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 180 transitions. [2023-11-22 22:59:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-22 22:59:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 180 transitions. [2023-11-22 22:59:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 22:59:27,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:27,478 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 22:59:27,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 22:59:27,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:59:27,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:27,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1704439485, now seen corresponding path program 1 times [2023-11-22 22:59:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870095414] [2023-11-22 22:59:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:59:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 22:59:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 22:59:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:59:27,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:27,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870095414] [2023-11-22 22:59:27,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870095414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:59:27,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903485638] [2023-11-22 22:59:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:27,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:59:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:59:27,747 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) [2023-11-22 22:59:27,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 22:59:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:27,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 22:59:27,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:59:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:59:27,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:59:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 22:59:27,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903485638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:59:27,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:59:27,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-22 22:59:27,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759710288] [2023-11-22 22:59:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:59:27,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 22:59:27,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 22:59:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:59:27,860 INFO L87 Difference]: Start difference. First operand 119 states and 180 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-22 22:59:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:27,919 INFO L93 Difference]: Finished difference Result 378 states and 596 transitions. [2023-11-22 22:59:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 22:59:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 35 [2023-11-22 22:59:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:27,923 INFO L225 Difference]: With dead ends: 378 [2023-11-22 22:59:27,923 INFO L226 Difference]: Without dead ends: 260 [2023-11-22 22:59:27,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:59:27,926 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:27,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 104 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-22 22:59:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-22 22:59:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 196 states have (on average 1.4387755102040816) internal successors, (282), 196 states have internal predecessors, (282), 60 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-22 22:59:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 402 transitions. [2023-11-22 22:59:27,952 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 402 transitions. Word has length 35 [2023-11-22 22:59:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:27,952 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 402 transitions. [2023-11-22 22:59:27,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-22 22:59:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 402 transitions. [2023-11-22 22:59:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-22 22:59:27,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:27,955 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-11-22 22:59:27,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 22:59:28,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 22:59:28,167 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:28,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -563554144, now seen corresponding path program 2 times [2023-11-22 22:59:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:28,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158983106] [2023-11-22 22:59:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:59:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 22:59:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 22:59:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-22 22:59:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-22 22:59:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-22 22:59:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-22 22:59:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-22 22:59:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-22 22:59:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-22 22:59:28,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:28,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158983106] [2023-11-22 22:59:28,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158983106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:59:28,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:59:28,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 22:59:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370914900] [2023-11-22 22:59:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:59:28,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 22:59:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 22:59:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:59:28,299 INFO L87 Difference]: Start difference. First operand 260 states and 402 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 22:59:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:28,350 INFO L93 Difference]: Finished difference Result 266 states and 407 transitions. [2023-11-22 22:59:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:59:28,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2023-11-22 22:59:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:28,354 INFO L225 Difference]: With dead ends: 266 [2023-11-22 22:59:28,354 INFO L226 Difference]: Without dead ends: 264 [2023-11-22 22:59:28,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:59:28,357 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:28,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-22 22:59:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-11-22 22:59:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 199 states have (on average 1.4321608040201006) internal successors, (285), 199 states have internal predecessors, (285), 60 states have call successors, (60), 4 states have call predecessors, (60), 4 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-22 22:59:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 405 transitions. [2023-11-22 22:59:28,402 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 405 transitions. Word has length 80 [2023-11-22 22:59:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:28,406 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 405 transitions. [2023-11-22 22:59:28,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 22:59:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 405 transitions. [2023-11-22 22:59:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-22 22:59:28,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:59:28,410 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-11-22 22:59:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 22:59:28,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:59:28,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:59:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1289698158, now seen corresponding path program 2 times [2023-11-22 22:59:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:59:28,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509325546] [2023-11-22 22:59:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:59:28,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:59:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 22:59:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:59:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 22:59:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 22:59:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-22 22:59:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-22 22:59:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-22 22:59:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-22 22:59:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-22 22:59:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-22 22:59:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:59:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-22 22:59:28,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:59:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509325546] [2023-11-22 22:59:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509325546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:59:28,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:59:28,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 22:59:28,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342773856] [2023-11-22 22:59:28,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:59:28,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 22:59:28,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:59:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 22:59:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:59:28,561 INFO L87 Difference]: Start difference. First operand 264 states and 405 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 22:59:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:59:28,602 INFO L93 Difference]: Finished difference Result 264 states and 405 transitions. [2023-11-22 22:59:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:59:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2023-11-22 22:59:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:59:28,604 INFO L225 Difference]: With dead ends: 264 [2023-11-22 22:59:28,605 INFO L226 Difference]: Without dead ends: 0 [2023-11-22 22:59:28,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:59:28,608 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:59:28,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:59:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-22 22:59:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-22 22:59:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:59:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-22 22:59:28,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2023-11-22 22:59:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:59:28,611 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-22 22:59:28,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 22:59:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-22 22:59:28,611 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-22 22:59:28,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-22 22:59:28,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 22:59:28,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-22 22:59:28,941 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (= |ULTIMATE.start_main_~m~0#1| 60) (<= |ULTIMATE.start_main_~n~0#1| 60)) [2023-11-22 22:59:28,941 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-11-22 22:59:28,941 INFO L899 garLoopResultBuilder]: For program point L23(lines 23 29) no Hoare annotation was computed. [2023-11-22 22:59:28,941 INFO L895 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~m~0#1| 60) (<= |ULTIMATE.start_main_~n~0#1| 60)) [2023-11-22 22:59:28,942 INFO L895 garLoopResultBuilder]: At program point L19-1(line 19) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~m~0#1| 60) (<= |ULTIMATE.start_main_~n~0#1| 60)) [2023-11-22 22:59:28,942 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2023-11-22 22:59:28,942 INFO L899 garLoopResultBuilder]: For program point L33(lines 33 41) no Hoare annotation was computed. [2023-11-22 22:59:28,942 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-22 22:59:28,942 INFO L895 garLoopResultBuilder]: At program point L33-1(lines 18 43) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~m~0#1| 60) (<= |ULTIMATE.start_main_~n~0#1| 60)) [2023-11-22 22:59:28,942 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 42) no Hoare annotation was computed. [2023-11-22 22:59:28,942 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-22 22:59:28,942 INFO L895 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~m~0#1| 60) (= |ULTIMATE.start_main_~n~0#1| 60)) [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L38-1(line 38) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L34(lines 34 40) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 30) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 18 43) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(line 13) no Hoare annotation was computed. [2023-11-22 22:59:28,943 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line 13) the Hoare annotation is: true [2023-11-22 22:59:28,944 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2023-11-22 22:59:28,946 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-11-22 22:59:28,948 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-22 22:59:28,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 10:59:28 BoogieIcfgContainer [2023-11-22 22:59:28,957 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-22 22:59:28,958 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-22 22:59:28,958 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-22 22:59:28,958 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-22 22:59:28,958 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:59:26" (3/4) ... [2023-11-22 22:59:28,960 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-22 22:59:28,962 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-22 22:59:28,966 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-22 22:59:28,966 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-22 22:59:28,966 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-22 22:59:28,966 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-22 22:59:29,032 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-11-22 22:59:29,032 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2023-11-22 22:59:29,033 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-22 22:59:29,033 INFO L158 Benchmark]: Toolchain (without parser) took 3127.98ms. Allocated memory was 146.8MB in the beginning and 184.5MB in the end (delta: 37.7MB). Free memory was 88.4MB in the beginning and 75.4MB in the end (delta: 13.0MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. [2023-11-22 22:59:29,033 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 22:59:29,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.48ms. Allocated memory is still 146.8MB. Free memory was 88.4MB in the beginning and 77.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 22:59:29,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.69ms. Allocated memory is still 146.8MB. Free memory was 77.9MB in the beginning and 76.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 22:59:29,033 INFO L158 Benchmark]: Boogie Preprocessor took 20.36ms. Allocated memory is still 146.8MB. Free memory was 76.8MB in the beginning and 75.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 22:59:29,034 INFO L158 Benchmark]: RCFGBuilder took 227.43ms. Allocated memory is still 146.8MB. Free memory was 75.6MB in the beginning and 64.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 22:59:29,034 INFO L158 Benchmark]: TraceAbstraction took 2591.28ms. Allocated memory was 146.8MB in the beginning and 184.5MB in the end (delta: 37.7MB). Free memory was 64.0MB in the beginning and 79.6MB in the end (delta: -15.6MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2023-11-22 22:59:29,040 INFO L158 Benchmark]: Witness Printer took 74.67ms. Allocated memory is still 184.5MB. Free memory was 79.6MB in the beginning and 75.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-22 22:59:29,043 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.48ms. Allocated memory is still 146.8MB. Free memory was 88.4MB in the beginning and 77.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.69ms. Allocated memory is still 146.8MB. Free memory was 77.9MB in the beginning and 76.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.36ms. Allocated memory is still 146.8MB. Free memory was 76.8MB in the beginning and 75.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 227.43ms. Allocated memory is still 146.8MB. Free memory was 75.6MB in the beginning and 64.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2591.28ms. Allocated memory was 146.8MB in the beginning and 184.5MB in the end (delta: 37.7MB). Free memory was 64.0MB in the beginning and 79.6MB in the end (delta: -15.6MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. * Witness Printer took 74.67ms. Allocated memory is still 184.5MB. Free memory was 79.6MB in the beginning and 75.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 189 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 168 mSDsluCounter, 606 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 412 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 156 IncrementalHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 194 mSDtfsCounter, 156 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=264occurred in iteration=7, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 119 PreInvPairs, 204 NumberOfFragments, 36 HoareAnnotationTreeSize, 119 FomulaSimplifications, 894 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 565 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 415 ConstructedInterpolants, 0 QuantifiedInterpolants, 677 SizeOfPredicates, 0 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 750/792 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((m <= 60) && (n <= 60)) RESULT: Ultimate proved your program to be correct! [2023-11-22 22:59:29,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE