./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.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_unwindbound20.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 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:34:47,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:34:47,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:34:47,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:34:47,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:34:47,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:34:47,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:34:47,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:34:47,472 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:34:47,473 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:34:47,473 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:34:47,473 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:34:47,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:34:47,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:34:47,476 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:34:47,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:34:47,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:34:47,477 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:34:47,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:34:47,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:34:47,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:34:47,480 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:34:47,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:34:47,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:34:47,481 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:34:47,481 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:34:47,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:34:47,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:34:47,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:34:47,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:34:47,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:34:47,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:34:47,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:34:47,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:34:47,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:34:47,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:34:47,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:34:47,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:34:47,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:34:47,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:34:47,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:34:47,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:34:47,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 [2024-11-08 14:34:47,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:34:47,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:34:47,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:34:47,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:34:47,700 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:34:47,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2024-11-08 14:34:48,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:34:49,031 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:34:49,031 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2024-11-08 14:34:49,037 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3bb9757/51a956277e80466e83a9ddf07024acd1/FLAGe9a523399 [2024-11-08 14:34:49,049 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3bb9757/51a956277e80466e83a9ddf07024acd1 [2024-11-08 14:34:49,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:34:49,053 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:34:49,054 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:34:49,054 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:34:49,058 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:34:49,059 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,060 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e6d48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49, skipping insertion in model container [2024-11-08 14:34:49,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,076 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:34:49,214 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_unwindbound20.c[537,550] [2024-11-08 14:34:49,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:34:49,233 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:34:49,241 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_unwindbound20.c[537,550] [2024-11-08 14:34:49,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:34:49,261 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:34:49,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49 WrapperNode [2024-11-08 14:34:49,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:34:49,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:34:49,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:34:49,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:34:49,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,284 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-08 14:34:49,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:34:49,285 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:34:49,285 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:34:49,285 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:34:49,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,301 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 14:34:49,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:34:49,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:34:49,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:34:49,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:34:49,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (1/1) ... [2024-11-08 14:34:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:34:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:49,334 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 14:34:49,338 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 14:34:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:34:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:34:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:34:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:34:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:34:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:34:49,425 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:34:49,428 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:34:49,556 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-08 14:34:49,556 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:34:49,567 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:34:49,568 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 14:34:49,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:34:49 BoogieIcfgContainer [2024-11-08 14:34:49,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:34:49,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:34:49,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:34:49,574 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:34:49,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:34:49" (1/3) ... [2024-11-08 14:34:49,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780753bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:34:49, skipping insertion in model container [2024-11-08 14:34:49,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:34:49" (2/3) ... [2024-11-08 14:34:49,576 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780753bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:34:49, skipping insertion in model container [2024-11-08 14:34:49,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:34:49" (3/3) ... [2024-11-08 14:34:49,577 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2024-11-08 14:34:49,589 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:34:49,590 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:34:49,641 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:34:49,647 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;@5a412d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:34:49,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:34:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:34:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:34:49,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:49,658 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:49,658 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:49,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2024-11-08 14:34:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:49,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945835328] [2024-11-08 14:34:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:34:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:49,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945835328] [2024-11-08 14:34:49,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945835328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:34:49,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:34:49,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:34:49,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496347540] [2024-11-08 14:34:49,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:49,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:34:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:34:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:34:49,824 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-11-08 14:34:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:49,844 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2024-11-08 14:34:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:34:49,845 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2024-11-08 14:34:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:49,850 INFO L225 Difference]: With dead ends: 53 [2024-11-08 14:34:49,851 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 14:34:49,857 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 [2024-11-08 14:34:49,861 INFO L432 NwaCegarLoop]: 38 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, 38 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 14:34:49,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:34:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 14:34:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 14:34:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:34:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2024-11-08 14:34:49,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2024-11-08 14:34:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:49,894 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2024-11-08 14:34:49,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-11-08 14:34:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2024-11-08 14:34:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:34:49,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:49,895 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:49,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:34:49,896 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:49,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2024-11-08 14:34:49,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541507496] [2024-11-08 14:34:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:34:50,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541507496] [2024-11-08 14:34:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541507496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:34:50,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:34:50,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:34:50,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051815454] [2024-11-08 14:34:50,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:50,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:34:50,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:34:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:34:50,082 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-08 14:34:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:50,146 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2024-11-08 14:34:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:34:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2024-11-08 14:34:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:50,147 INFO L225 Difference]: With dead ends: 38 [2024-11-08 14:34:50,147 INFO L226 Difference]: Without dead ends: 36 [2024-11-08 14:34:50,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 14:34:50,148 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 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 14:34:50,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:34:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-08 14:34:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2024-11-08 14:34:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:34:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-08 14:34:50,160 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2024-11-08 14:34:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:50,160 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-08 14:34:50,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-08 14:34:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-08 14:34:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 14:34:50,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:50,162 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:50,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:34:50,173 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:50,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:50,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2024-11-08 14:34:50,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:50,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139490828] [2024-11-08 14:34:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:50,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:34:50,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139490828] [2024-11-08 14:34:50,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139490828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:34:50,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:34:50,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:34:50,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509509046] [2024-11-08 14:34:50,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:50,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:34:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:34:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:34:50,256 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-08 14:34:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:50,274 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-11-08 14:34:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:34:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2024-11-08 14:34:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:50,277 INFO L225 Difference]: With dead ends: 44 [2024-11-08 14:34:50,277 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 14:34:50,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:34:50,278 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:50,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:34:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 14:34:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-08 14:34:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:34:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-11-08 14:34:50,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2024-11-08 14:34:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:50,284 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-11-08 14:34:50,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-08 14:34:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-11-08 14:34:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 14:34:50,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:50,285 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:50,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 14:34:50,285 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:50,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2024-11-08 14:34:50,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:50,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610271599] [2024-11-08 14:34:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:50,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:34:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:34:50,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610271599] [2024-11-08 14:34:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610271599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:34:50,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:34:50,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:34:50,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140368435] [2024-11-08 14:34:50,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:50,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:34:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:34:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:34:50,464 INFO L87 Difference]: Start difference. First operand 30 states and 39 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) [2024-11-08 14:34:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:50,515 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-11-08 14:34:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:34:50,515 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 15 [2024-11-08 14:34:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:50,517 INFO L225 Difference]: With dead ends: 44 [2024-11-08 14:34:50,518 INFO L226 Difference]: Without dead ends: 42 [2024-11-08 14:34:50,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 14:34:50,519 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:50,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:34:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-08 14:34:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-08 14:34:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:34:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-08 14:34:50,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2024-11-08 14:34:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:50,526 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-08 14:34:50,527 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) [2024-11-08 14:34:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-08 14:34:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 14:34:50,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:50,528 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:50,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 14:34:50,528 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:50,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2024-11-08 14:34:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346497223] [2024-11-08 14:34:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:34:50,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229707751] [2024-11-08 14:34:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:50,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:50,547 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 14:34:50,548 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 14:34:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:50,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:34:50,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:34:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:34:50,750 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:34:50,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:50,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346497223] [2024-11-08 14:34:50,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:34:50,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229707751] [2024-11-08 14:34:50,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229707751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:34:50,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:34:50,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 14:34:50,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603131964] [2024-11-08 14:34:50,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:50,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 14:34:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 14:34:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:34:50,756 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:34:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:50,876 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-11-08 14:34:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 14:34:50,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-08 14:34:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:50,878 INFO L225 Difference]: With dead ends: 63 [2024-11-08 14:34:50,878 INFO L226 Difference]: Without dead ends: 48 [2024-11-08 14:34:50,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:34:50,879 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:50,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:34:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-08 14:34:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-08 14:34:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-08 14:34:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-11-08 14:34:50,886 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2024-11-08 14:34:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:50,886 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-11-08 14:34:50,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:34:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-11-08 14:34:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 14:34:50,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:50,887 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:50,900 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 14:34:51,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:51,093 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:51,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:51,093 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2024-11-08 14:34:51,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:51,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493677659] [2024-11-08 14:34:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:51,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:34:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:51,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 14:34:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:51,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 14:34:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:34:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493677659] [2024-11-08 14:34:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493677659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:34:51,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:34:51,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:34:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783196202] [2024-11-08 14:34:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:51,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:34:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:34:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:34:51,155 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 14:34:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:51,178 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-08 14:34:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:34:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 28 [2024-11-08 14:34:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:51,181 INFO L225 Difference]: With dead ends: 67 [2024-11-08 14:34:51,181 INFO L226 Difference]: Without dead ends: 60 [2024-11-08 14:34:51,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:34:51,182 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:51,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:34:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-08 14:34:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-08 14:34:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-08 14:34:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-11-08 14:34:51,197 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2024-11-08 14:34:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:51,197 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-11-08 14:34:51,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 14:34:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-11-08 14:34:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 14:34:51,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:51,198 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:51,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 14:34:51,198 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:51,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2024-11-08 14:34:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:51,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154490605] [2024-11-08 14:34:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:51,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:34:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69009368] [2024-11-08 14:34:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:51,225 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 14:34:51,226 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 14:34:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:51,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 14:34:51,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:34:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 14:34:51,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:34:51,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154490605] [2024-11-08 14:34:51,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:34:51,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69009368] [2024-11-08 14:34:51,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69009368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:34:51,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:34:51,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-08 14:34:51,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775073827] [2024-11-08 14:34:51,826 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:34:51,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:34:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:34:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:34:51,828 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:34:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:52,087 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-08 14:34:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 14:34:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-08 14:34:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:52,089 INFO L225 Difference]: With dead ends: 67 [2024-11-08 14:34:52,090 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 14:34:52,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-08 14:34:52,091 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:52,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 173 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:34:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 14:34:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-08 14:34:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:34:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-08 14:34:52,097 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 28 [2024-11-08 14:34:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:52,098 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-08 14:34:52,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:34:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-08 14:34:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 14:34:52,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:52,098 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:52,112 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 14:34:52,302 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,SelfDestructingSolverStorable6 [2024-11-08 14:34:52,303 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:52,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2024-11-08 14:34:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:52,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417530272] [2024-11-08 14:34:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:52,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:34:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:52,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 14:34:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:52,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 14:34:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:34:52,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:52,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417530272] [2024-11-08 14:34:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417530272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:34:52,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050085597] [2024-11-08 14:34:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:52,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:52,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:52,370 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 14:34:52,371 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 14:34:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:52,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 14:34:52,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:34:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:34:52,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:34:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:34:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050085597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:34:52,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:34:52,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-08 14:34:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103765165] [2024-11-08 14:34:52,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:34:52,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:34:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:34:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:34:52,486 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 14:34:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:52,567 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2024-11-08 14:34:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:34:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2024-11-08 14:34:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:52,568 INFO L225 Difference]: With dead ends: 115 [2024-11-08 14:34:52,568 INFO L226 Difference]: Without dead ends: 101 [2024-11-08 14:34:52,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:34:52,569 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:52,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 151 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:34:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-08 14:34:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2024-11-08 14:34:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-08 14:34:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-11-08 14:34:52,580 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 30 [2024-11-08 14:34:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:52,580 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-11-08 14:34:52,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 14:34:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-11-08 14:34:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 14:34:52,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:52,581 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:52,594 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 14:34:52,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:52,786 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:52,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1884102282, now seen corresponding path program 1 times [2024-11-08 14:34:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602527600] [2024-11-08 14:34:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:52,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:34:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548358744] [2024-11-08 14:34:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:52,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:52,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:52,815 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 14:34:52,816 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 14:34:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:52,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:34:52,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:34:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:34:52,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:34:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:34:53,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602527600] [2024-11-08 14:34:53,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:34:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548358744] [2024-11-08 14:34:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548358744] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:34:53,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:34:53,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-11-08 14:34:53,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129181812] [2024-11-08 14:34:53,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:34:53,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:34:53,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:53,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:34:53,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:34:53,061 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:34:57,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-08 14:34:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:57,320 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2024-11-08 14:34:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:34:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-08 14:34:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:57,323 INFO L225 Difference]: With dead ends: 114 [2024-11-08 14:34:57,323 INFO L226 Difference]: Without dead ends: 112 [2024-11-08 14:34:57,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 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 14:34:57,323 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:57,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 96 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-11-08 14:34:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-08 14:34:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2024-11-08 14:34:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 73 states have internal predecessors, (82), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-08 14:34:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2024-11-08 14:34:57,339 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 38 [2024-11-08 14:34:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:57,339 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2024-11-08 14:34:57,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:34:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2024-11-08 14:34:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 14:34:57,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:57,340 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:57,346 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 14:34:57,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:57,541 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:57,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2024-11-08 14:34:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391087155] [2024-11-08 14:34:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:34:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 14:34:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 14:34:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 14:34:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 14:34:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:34:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 14:34:57,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:34:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391087155] [2024-11-08 14:34:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391087155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:34:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819902034] [2024-11-08 14:34:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:57,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:57,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:57,615 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 14:34:57,616 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 14:34:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:57,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:34:57,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:34:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:34:57,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:34:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 14:34:57,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819902034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:34:57,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:34:57,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-08 14:34:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434918383] [2024-11-08 14:34:57,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:34:57,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:34:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:34:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:34:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:34:57,782 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-08 14:34:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:34:57,932 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2024-11-08 14:34:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:34:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 46 [2024-11-08 14:34:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:34:57,935 INFO L225 Difference]: With dead ends: 199 [2024-11-08 14:34:57,935 INFO L226 Difference]: Without dead ends: 185 [2024-11-08 14:34:57,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:34:57,936 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:34:57,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 142 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:34:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-08 14:34:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2024-11-08 14:34:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 115 states have (on average 1.182608695652174) internal successors, (136), 122 states have internal predecessors, (136), 40 states have call successors, (40), 22 states have call predecessors, (40), 22 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-08 14:34:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 212 transitions. [2024-11-08 14:34:57,974 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 212 transitions. Word has length 46 [2024-11-08 14:34:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:34:57,975 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 212 transitions. [2024-11-08 14:34:57,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-08 14:34:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 212 transitions. [2024-11-08 14:34:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 14:34:57,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:34:57,976 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:34:57,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 14:34:58,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 14:34:58,177 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:34:58,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:34:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2024-11-08 14:34:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:34:58,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135299634] [2024-11-08 14:34:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:58,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:34:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:34:58,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667815743] [2024-11-08 14:34:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:34:58,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:34:58,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:34:58,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:34:58,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:34:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:34:58,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 14:34:58,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:34:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 14:34:58,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:35:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 14:35:03,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:35:03,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135299634] [2024-11-08 14:35:03,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:35:03,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667815743] [2024-11-08 14:35:03,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667815743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:35:03,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:35:03,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2024-11-08 14:35:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676873572] [2024-11-08 14:35:03,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:35:03,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 14:35:03,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:35:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 14:35:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2024-11-08 14:35:03,603 INFO L87 Difference]: Start difference. First operand 178 states and 212 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-08 14:35:07,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-08 14:35:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:35:07,870 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2024-11-08 14:35:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:35:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2024-11-08 14:35:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:35:07,872 INFO L225 Difference]: With dead ends: 242 [2024-11-08 14:35:07,872 INFO L226 Difference]: Without dead ends: 238 [2024-11-08 14:35:07,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=100, Invalid=319, Unknown=1, NotChecked=0, Total=420 [2024-11-08 14:35:07,873 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:35:07,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 212 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-11-08 14:35:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-08 14:35:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2024-11-08 14:35:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 146 states have (on average 1.1917808219178083) internal successors, (174), 157 states have internal predecessors, (174), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-08 14:35:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2024-11-08 14:35:07,915 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 46 [2024-11-08 14:35:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:35:07,915 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2024-11-08 14:35:07,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-08 14:35:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2024-11-08 14:35:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 14:35:07,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:35:07,920 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:35:07,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 14:35:08,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:08,124 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:35:08,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:35:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2024-11-08 14:35:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:35:08,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451421082] [2024-11-08 14:35:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:35:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:35:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293869197] [2024-11-08 14:35:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:35:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:35:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:35:08,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:35:08,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:36:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:36:03,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-08 14:36:03,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:36:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-08 14:36:03,936 INFO L311 TraceCheckSpWp]: Computing backward predicates...