./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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-scaling/hard-u_valuebound100.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 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:35:06,603 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:35:06,687 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:35:06,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:35:06,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:35:06,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:35:06,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:35:06,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:35:06,726 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:35:06,727 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:35:06,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:35:06,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:35:06,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:35:06,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:35:06,731 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:35:06,731 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:35:06,731 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:35:06,732 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:35:06,732 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:35:06,732 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:35:06,733 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:35:06,737 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:35:06,737 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:35:06,737 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:35:06,738 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:35:06,738 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:35:06,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:35:06,738 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:35:06,739 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:35:06,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:35:06,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:35:06,740 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:35:06,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:35:06,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:35:06,741 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:35:06,741 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:35:06,741 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:35:06,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:35:06,742 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:35:06,742 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:35:06,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:35:06,743 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:35:06,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 [2024-11-08 14:35:07,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:35:07,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:35:07,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:35:07,044 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:35:07,044 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:35:07,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2024-11-08 14:35:08,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:35:08,681 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:35:08,682 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2024-11-08 14:35:08,691 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff1d6ac3/5682fede8f2f462992d57cdf3b31580a/FLAG46e756ed8 [2024-11-08 14:35:09,080 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff1d6ac3/5682fede8f2f462992d57cdf3b31580a [2024-11-08 14:35:09,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:35:09,084 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:35:09,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:35:09,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:35:09,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:35:09,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fabf5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09, skipping insertion in model container [2024-11-08 14:35:09,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,112 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:35:09,303 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-scaling/hard-u_valuebound100.c[537,550] [2024-11-08 14:35:09,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:35:09,336 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:35:09,350 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-scaling/hard-u_valuebound100.c[537,550] [2024-11-08 14:35:09,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:35:09,381 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:35:09,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09 WrapperNode [2024-11-08 14:35:09,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:35:09,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:35:09,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:35:09,385 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:35:09,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,415 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-08 14:35:09,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:35:09,416 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:35:09,416 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:35:09,416 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:35:09,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,438 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]. [2024-11-08 14:35:09,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,439 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,448 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:35:09,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:35:09,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:35:09,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:35:09,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (1/1) ... [2024-11-08 14:35:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:35:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:09,489 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) [2024-11-08 14:35:09,492 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 [2024-11-08 14:35:09,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:35:09,541 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 14:35:09,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 14:35:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:35:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:35:09,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:35:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:35:09,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:35:09,614 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:35:09,617 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:35:09,779 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-08 14:35:09,779 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:35:09,793 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:35:09,793 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 14:35:09,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:35:09 BoogieIcfgContainer [2024-11-08 14:35:09,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:35:09,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:35:09,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:35:09,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:35:09,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:35:09" (1/3) ... [2024-11-08 14:35:09,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baa8e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:35:09, skipping insertion in model container [2024-11-08 14:35:09,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:35:09" (2/3) ... [2024-11-08 14:35:09,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baa8e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:35:09, skipping insertion in model container [2024-11-08 14:35:09,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:35:09" (3/3) ... [2024-11-08 14:35:09,803 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.c [2024-11-08 14:35:09,818 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:35:09,818 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:35:09,876 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:35:09,882 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;@1fad8d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:35:09,882 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:35:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 14:35:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 14:35:09,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:09,895 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:09,895 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:09,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2024-11-08 14:35:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205743969] [2024-11-08 14:35:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:35:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:35:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:35:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:35:10,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:10,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205743969] [2024-11-08 14:35:10,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205743969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:35:10,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:35:10,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:35:10,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902624925] [2024-11-08 14:35:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:35:10,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:35:10,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:35:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:35:10,122 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:35:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:10,139 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2024-11-08 14:35:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:35:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-11-08 14:35:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:10,146 INFO L225 Difference]: With dead ends: 63 [2024-11-08 14:35:10,146 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 14:35:10,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:35:10,152 INFO L432 NwaCegarLoop]: 43 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, 43 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 [2024-11-08 14:35:10,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:35:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 14:35:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-08 14:35:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:35:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-11-08 14:35:10,183 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2024-11-08 14:35:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:10,184 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-11-08 14:35:10,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:35:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-11-08 14:35:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 14:35:10,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:10,186 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:10,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:35:10,186 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:10,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2024-11-08 14:35:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:10,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132792396] [2024-11-08 14:35:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:35:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:35:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:35:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:35:10,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132792396] [2024-11-08 14:35:10,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132792396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:35:10,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:35:10,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:35:10,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778044792] [2024-11-08 14:35:10,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:35:10,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:35:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:35:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:35:10,473 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 14:35:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:10,562 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-11-08 14:35:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:35:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-11-08 14:35:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:10,565 INFO L225 Difference]: With dead ends: 42 [2024-11-08 14:35:10,565 INFO L226 Difference]: Without dead ends: 40 [2024-11-08 14:35:10,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:35:10,567 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:10,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:35:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-08 14:35:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-11-08 14:35:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:35:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-08 14:35:10,588 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2024-11-08 14:35:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:10,588 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-08 14:35:10,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 14:35:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-08 14:35:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 14:35:10,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:10,591 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:10,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:35:10,591 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:10,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2024-11-08 14:35:10,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:10,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218017683] [2024-11-08 14:35:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:10,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:35:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:35:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:35:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:10,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 14:35:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:35:11,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:11,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218017683] [2024-11-08 14:35:11,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218017683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:35:11,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:35:11,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:35:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986086305] [2024-11-08 14:35:11,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:35:11,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:35:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:35:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:35:11,008 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:35:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:11,127 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-11-08 14:35:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:35:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-08 14:35:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:11,129 INFO L225 Difference]: With dead ends: 46 [2024-11-08 14:35:11,129 INFO L226 Difference]: Without dead ends: 44 [2024-11-08 14:35:11,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:35:11,131 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:11,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:35:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-08 14:35:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-11-08 14:35:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:35:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-11-08 14:35:11,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2024-11-08 14:35:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:11,140 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-11-08 14:35:11,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:35:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-11-08 14:35:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 14:35:11,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:11,142 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:11,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 14:35:11,142 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:11,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2024-11-08 14:35:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:11,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503739934] [2024-11-08 14:35:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:11,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:35:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783647163] [2024-11-08 14:35:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:11,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:11,189 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) [2024-11-08 14:35:11,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:35:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:11,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 14:35:11,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:35:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 14:35:11,491 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:35:11,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:11,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503739934] [2024-11-08 14:35:11,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:35:11,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783647163] [2024-11-08 14:35:11,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783647163] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:35:11,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:35:11,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 14:35:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903597500] [2024-11-08 14:35:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:35:11,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 14:35:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 14:35:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:35:11,498 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 14:35:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:11,698 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-11-08 14:35:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 14:35:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-11-08 14:35:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:11,701 INFO L225 Difference]: With dead ends: 63 [2024-11-08 14:35:11,701 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 14:35:11,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:35:11,703 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:11,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 169 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:35:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 14:35:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-08 14:35:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-08 14:35:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-11-08 14:35:11,730 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 34 [2024-11-08 14:35:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:11,730 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-11-08 14:35:11,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 14:35:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-11-08 14:35:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 14:35:11,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:11,732 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:11,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:35:11,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:11,933 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:11,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2024-11-08 14:35:11,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:11,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750191092] [2024-11-08 14:35:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:35:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828008695] [2024-11-08 14:35:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:11,965 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) [2024-11-08 14:35:11,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:35:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:12,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 14:35:12,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:35:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:35:12,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:35:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 14:35:13,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:13,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750191092] [2024-11-08 14:35:13,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:35:13,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828008695] [2024-11-08 14:35:13,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828008695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:35:13,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:35:13,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-11-08 14:35:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185477761] [2024-11-08 14:35:13,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:35:13,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 14:35:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 14:35:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-08 14:35:13,435 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-08 14:35:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:13,929 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-11-08 14:35:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 14:35:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2024-11-08 14:35:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:13,932 INFO L225 Difference]: With dead ends: 68 [2024-11-08 14:35:13,932 INFO L226 Difference]: Without dead ends: 60 [2024-11-08 14:35:13,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-11-08 14:35:13,934 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:13,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 14:35:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-08 14:35:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-08 14:35:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 14:35:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-11-08 14:35:13,950 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 41 [2024-11-08 14:35:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:13,950 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-11-08 14:35:13,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-08 14:35:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-11-08 14:35:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 14:35:13,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:13,952 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:13,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:35:14,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:14,157 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:14,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2024-11-08 14:35:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:14,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613841036] [2024-11-08 14:35:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:35:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385648850] [2024-11-08 14:35:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:14,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:14,190 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) [2024-11-08 14:35:14,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:35:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:14,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:35:14,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:35:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-08 14:35:14,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:35:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-08 14:35:14,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613841036] [2024-11-08 14:35:14,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:35:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385648850] [2024-11-08 14:35:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385648850] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:35:14,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:35:14,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-11-08 14:35:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233973643] [2024-11-08 14:35:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:35:14,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:35:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:35:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:35:14,518 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-08 14:35:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:15,647 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2024-11-08 14:35:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:35:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2024-11-08 14:35:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:15,649 INFO L225 Difference]: With dead ends: 70 [2024-11-08 14:35:15,649 INFO L226 Difference]: Without dead ends: 68 [2024-11-08 14:35:15,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:35:15,650 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:15,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 14:35:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-08 14:35:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-11-08 14:35:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 44 states have internal predecessors, (45), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-08 14:35:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-11-08 14:35:15,665 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 51 [2024-11-08 14:35:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:15,665 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-11-08 14:35:15,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-08 14:35:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-11-08 14:35:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 14:35:15,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:15,667 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:15,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 14:35:15,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:15,872 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:15,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2024-11-08 14:35:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788661789] [2024-11-08 14:35:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:15,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:35:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:15,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:35:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:15,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:35:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:15,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 14:35:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:15,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-08 14:35:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-08 14:35:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-08 14:35:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-08 14:35:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-08 14:35:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-08 14:35:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-08 14:35:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-08 14:35:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788661789] [2024-11-08 14:35:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788661789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:35:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619783656] [2024-11-08 14:35:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:16,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:16,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:16,053 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) [2024-11-08 14:35:16,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:35:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:16,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 14:35:16,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:35:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-08 14:35:16,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:35:16,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619783656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:35:16,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:35:16,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-11-08 14:35:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461914107] [2024-11-08 14:35:16,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:35:16,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:35:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:35:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:35:16,269 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-08 14:35:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:16,476 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2024-11-08 14:35:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 14:35:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 69 [2024-11-08 14:35:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:16,478 INFO L225 Difference]: With dead ends: 99 [2024-11-08 14:35:16,478 INFO L226 Difference]: Without dead ends: 91 [2024-11-08 14:35:16,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:35:16,479 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:16,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:35:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-08 14:35:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2024-11-08 14:35:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-08 14:35:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-11-08 14:35:16,499 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 69 [2024-11-08 14:35:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:16,500 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-11-08 14:35:16,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-08 14:35:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-11-08 14:35:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-08 14:35:16,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:16,502 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:16,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:35:16,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:16,707 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:16,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2024-11-08 14:35:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:16,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777969557] [2024-11-08 14:35:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:16,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:35:16,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386241311] [2024-11-08 14:35:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:16,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:16,755 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) [2024-11-08 14:35:16,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:35:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:35:17,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-08 14:35:17,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:35:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 43 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-08 14:35:18,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:36:48,866 WARN L286 SmtUtils]: Spent 16.44s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)