./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps5-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/nla-digbench/ps5-ll.c -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 1d0411df2a3b388d2db53c57aaa1f7219c19c9d74992ef1ed00eab4b9b56cbed --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 01:13:30,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 01:13:30,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 01:13:30,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 01:13:30,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 01:13:30,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 01:13:30,552 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 01:13:30,552 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 01:13:30,552 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 01:13:30,553 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 01:13:30,553 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 01:13:30,553 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 01:13:30,554 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 01:13:30,554 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 01:13:30,554 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 01:13:30,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 01:13:30,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 01:13:30,555 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 01:13:30,555 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 01:13:30,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 01:13:30,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 01:13:30,556 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 01:13:30,557 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 01:13:30,557 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 01:13:30,557 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 01:13:30,557 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 01:13:30,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 01:13:30,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 01:13:30,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 01:13:30,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 01:13:30,560 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 01:13:30,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 01:13:30,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:13:30,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 01:13:30,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 01:13:30,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 01:13:30,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 01:13:30,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 01:13:30,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 01:13:30,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 01:13:30,562 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 01:13:30,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 01:13:30,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d0411df2a3b388d2db53c57aaa1f7219c19c9d74992ef1ed00eab4b9b56cbed [2024-11-22 01:13:30,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 01:13:30,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 01:13:30,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 01:13:30,775 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 01:13:30,776 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 01:13:30,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps5-ll.c [2024-11-22 01:13:32,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 01:13:32,188 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 01:13:32,189 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps5-ll.c [2024-11-22 01:13:32,195 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbbc6d989/101bcf1ec046449b861754e2f1de3d2c/FLAG35eed770f [2024-11-22 01:13:32,207 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbbc6d989/101bcf1ec046449b861754e2f1de3d2c [2024-11-22 01:13:32,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 01:13:32,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 01:13:32,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 01:13:32,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 01:13:32,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 01:13:32,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a18986f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32, skipping insertion in model container [2024-11-22 01:13:32,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,238 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 01:13:32,373 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps5-ll.c[458,471] [2024-11-22 01:13:32,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:13:32,399 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 01:13:32,411 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps5-ll.c[458,471] [2024-11-22 01:13:32,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:13:32,434 INFO L204 MainTranslator]: Completed translation [2024-11-22 01:13:32,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32 WrapperNode [2024-11-22 01:13:32,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 01:13:32,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 01:13:32,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 01:13:32,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 01:13:32,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,464 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2024-11-22 01:13:32,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 01:13:32,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 01:13:32,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 01:13:32,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 01:13:32,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,480 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,492 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-22 01:13:32,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,497 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 01:13:32,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 01:13:32,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 01:13:32,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 01:13:32,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (1/1) ... [2024-11-22 01:13:32,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:13:32,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:13:32,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 01:13:32,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 01:13:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 01:13:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 01:13:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 01:13:32,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 01:13:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 01:13:32,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 01:13:32,623 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 01:13:32,625 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 01:13:32,744 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-22 01:13:32,745 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 01:13:32,757 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 01:13:32,758 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-22 01:13:32,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:13:32 BoogieIcfgContainer [2024-11-22 01:13:32,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 01:13:32,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 01:13:32,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 01:13:32,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 01:13:32,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:13:32" (1/3) ... [2024-11-22 01:13:32,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd64bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:13:32, skipping insertion in model container [2024-11-22 01:13:32,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:32" (2/3) ... [2024-11-22 01:13:32,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd64bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:13:32, skipping insertion in model container [2024-11-22 01:13:32,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:13:32" (3/3) ... [2024-11-22 01:13:32,768 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll.c [2024-11-22 01:13:32,782 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 01:13:32,783 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 01:13:32,890 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 01:13:32,896 INFO L333 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, 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;@7ecb5b33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 01:13:32,896 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 01:13:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 01:13:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-22 01:13:32,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:13:32,904 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:13:32,904 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:13:32,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:13:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2024-11-22 01:13:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:13:32,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954650590] [2024-11-22 01:13:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:13:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:13:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:13:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:13:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954650590] [2024-11-22 01:13:33,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954650590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:13:33,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:13:33,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 01:13:33,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865743392] [2024-11-22 01:13:33,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:13:33,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 01:13:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:13:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 01:13:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:13:33,070 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-22 01:13:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:13:33,083 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2024-11-22 01:13:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 01:13:33,085 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2024-11-22 01:13:33,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:13:33,090 INFO L225 Difference]: With dead ends: 35 [2024-11-22 01:13:33,090 INFO L226 Difference]: Without dead ends: 15 [2024-11-22 01:13:33,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:13:33,095 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:13:33,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:13:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-22 01:13:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-22 01:13:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 01:13:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-22 01:13:33,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2024-11-22 01:13:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:13:33,121 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-22 01:13:33,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-22 01:13:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-22 01:13:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-22 01:13:33,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:13:33,121 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:13:33,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 01:13:33,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:13:33,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:13:33,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2024-11-22 01:13:33,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:13:33,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652879283] [2024-11-22 01:13:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:33,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:13:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:13:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941002991] [2024-11-22 01:13:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:13:33,148 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) [2024-11-22 01:13:33,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 01:13:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:13:33,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:13:33,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:13:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:13:33,292 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:13:33,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:13:33,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652879283] [2024-11-22 01:13:33,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:13:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941002991] [2024-11-22 01:13:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941002991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:13:33,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:13:33,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:13:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586643845] [2024-11-22 01:13:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:13:33,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:13:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:13:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:13:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:13:33,295 INFO L87 Difference]: Start difference. First operand 15 states and 17 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, (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) [2024-11-22 01:13:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:13:33,334 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-22 01:13:33,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:13:33,335 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, (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 9 [2024-11-22 01:13:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:13:33,335 INFO L225 Difference]: With dead ends: 26 [2024-11-22 01:13:33,336 INFO L226 Difference]: Without dead ends: 22 [2024-11-22 01:13:33,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:13:33,338 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:13:33,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:13:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-22 01:13:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-22 01:13:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 01:13:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-11-22 01:13:33,349 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2024-11-22 01:13:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:13:33,349 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-11-22 01:13:33,349 INFO L472 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, (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) [2024-11-22 01:13:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-11-22 01:13:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-22 01:13:33,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:13:33,350 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:13:33,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 01:13:33,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:33,551 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:13:33,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:13:33,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2024-11-22 01:13:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:13:33,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67913151] [2024-11-22 01:13:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:13:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:13:33,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796388989] [2024-11-22 01:13:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:33,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:13:33,587 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) [2024-11-22 01:13:33,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 01:13:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:13:33,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 01:13:33,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:13:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:13:33,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:13:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 01:13:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:13:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67913151] [2024-11-22 01:13:33,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:13:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796388989] [2024-11-22 01:13:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796388989] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 01:13:33,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:13:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-22 01:13:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763349514] [2024-11-22 01:13:33,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:13:33,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:13:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:13:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:13:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-22 01:13:33,759 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-22 01:13:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:13:33,797 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-11-22 01:13:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:13:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2024-11-22 01:13:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:13:33,798 INFO L225 Difference]: With dead ends: 28 [2024-11-22 01:13:33,798 INFO L226 Difference]: Without dead ends: 24 [2024-11-22 01:13:33,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-22 01:13:33,799 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:13:33,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:13:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-22 01:13:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-22 01:13:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 01:13:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-22 01:13:33,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2024-11-22 01:13:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:13:33,808 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-22 01:13:33,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-22 01:13:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-22 01:13:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-22 01:13:33,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:13:33,809 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:13:33,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 01:13:34,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-22 01:13:34,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:13:34,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:13:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash 233982219, now seen corresponding path program 1 times [2024-11-22 01:13:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:13:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985484527] [2024-11-22 01:13:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:34,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:13:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:13:34,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170698480] [2024-11-22 01:13:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:13:34,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:34,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:13:34,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:13:34,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 01:13:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:13:34,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 01:13:34,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:13:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 01:13:34,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:13:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 01:13:34,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:13:34,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985484527] [2024-11-22 01:13:34,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:13:34,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170698480] [2024-11-22 01:13:34,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170698480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:13:34,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:13:34,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-22 01:13:34,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991077997] [2024-11-22 01:13:34,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:13:34,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 01:13:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:13:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 01:13:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-22 01:13:34,309 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 01:13:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:13:34,418 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2024-11-22 01:13:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 01:13:34,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2024-11-22 01:13:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:13:34,421 INFO L225 Difference]: With dead ends: 41 [2024-11-22 01:13:34,421 INFO L226 Difference]: Without dead ends: 33 [2024-11-22 01:13:34,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-22 01:13:34,423 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:13:34,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 75 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:13:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-22 01:13:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-22 01:13:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 01:13:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-22 01:13:34,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2024-11-22 01:13:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:13:34,437 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-22 01:13:34,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 01:13:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-22 01:13:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-22 01:13:34,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:13:34,438 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:13:34,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 01:13:34,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:34,639 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:13:34,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:13:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1195970082, now seen corresponding path program 2 times [2024-11-22 01:13:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:13:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25716395] [2024-11-22 01:13:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:13:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:13:34,698 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:13:34,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:13:34,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086955421] [2024-11-22 01:13:34,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:13:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:13:34,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:13:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 01:13:34,747 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:13:34,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:13:34,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 01:13:34,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:13:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-22 01:13:34,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:13:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-22 01:13:35,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:13:35,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25716395] [2024-11-22 01:13:35,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:13:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086955421] [2024-11-22 01:13:35,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086955421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:13:35,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:13:35,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-22 01:13:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324471533] [2024-11-22 01:13:35,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:13:35,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 01:13:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:13:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 01:13:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-22 01:13:35,201 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-22 01:13:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:13:35,592 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-11-22 01:13:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 01:13:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 48 [2024-11-22 01:13:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:13:35,593 INFO L225 Difference]: With dead ends: 56 [2024-11-22 01:13:35,593 INFO L226 Difference]: Without dead ends: 48 [2024-11-22 01:13:35,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-22 01:13:35,595 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:13:35,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:13:35,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-22 01:13:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-22 01:13:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-22 01:13:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2024-11-22 01:13:35,611 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 48 [2024-11-22 01:13:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:13:35,612 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2024-11-22 01:13:35,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-22 01:13:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2024-11-22 01:13:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-22 01:13:35,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:13:35,614 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:13:35,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 01:13:35,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:35,814 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:13:35,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:13:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2060454283, now seen corresponding path program 3 times [2024-11-22 01:13:35,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:13:35,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377203925] [2024-11-22 01:13:35,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:13:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:13:36,024 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-22 01:13:36,024 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:13:36,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432684443] [2024-11-22 01:13:36,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:13:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:13:36,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:13:36,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:13:36,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 01:13:36,119 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-22 01:13:36,119 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:13:36,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-22 01:13:36,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:13:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 30 proven. 157 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-22 01:13:36,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:13:44,722 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 6) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 6))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2024-11-22 01:13:56,800 WARN L286 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-22 01:14:13,084 WARN L286 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-22 01:14:17,095 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6)) 30) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| 6)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6)))))) is different from true [2024-11-22 01:14:33,132 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-22 01:14:49,803 WARN L286 SmtUtils]: Spent 8.65s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-22 01:14:53,820 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6)) 30) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| 6)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6))))) (= c___VERIFIER_assert_~cond 0)) is different from true