./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/hardware-verification-bv/btor2c-lazyMod.count4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 7520cfa04676a157cc3b0d71c42a9ed73acdf0d120a939e33f1a3e61a093ef11 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 01:57:49,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 01:57:49,437 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-10 01:57:49,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 01:57:49,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 01:57:49,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 01:57:49,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 01:57:49,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 01:57:49,475 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 01:57:49,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 01:57:49,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 01:57:49,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 01:57:49,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 01:57:49,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 01:57:49,480 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 01:57:49,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 01:57:49,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 01:57:49,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 01:57:49,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 01:57:49,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 01:57:49,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 01:57:49,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 01:57:49,487 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 01:57:49,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 01:57:49,487 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 01:57:49,487 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 01:57:49,487 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 01:57:49,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 01:57:49,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 01:57:49,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 01:57:49,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 01:57:49,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 01:57:49,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 01:57:49,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 01:57:49,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 01:57:49,489 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 01:57:49,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 01:57:49,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 01:57:49,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 01:57:49,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7520cfa04676a157cc3b0d71c42a9ed73acdf0d120a939e33f1a3e61a093ef11 [2024-11-10 01:57:49,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 01:57:49,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 01:57:49,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 01:57:49,774 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 01:57:49,774 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 01:57:49,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c [2024-11-10 01:57:51,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 01:57:51,549 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 01:57:51,550 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.count4.c [2024-11-10 01:57:51,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b9943a3/eb1031a5f8034b3fab4b61ce772c1c34/FLAGf90d54ac5 [2024-11-10 01:57:51,578 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b9943a3/eb1031a5f8034b3fab4b61ce772c1c34 [2024-11-10 01:57:51,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 01:57:51,585 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 01:57:51,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 01:57:51,589 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 01:57:51,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 01:57:51,595 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e24de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51, skipping insertion in model container [2024-11-10 01:57:51,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,620 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 01:57:51,795 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/hardware-verification-bv/btor2c-lazyMod.count4.c[1256,1269] [2024-11-10 01:57:51,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 01:57:51,833 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 01:57:51,843 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/hardware-verification-bv/btor2c-lazyMod.count4.c[1256,1269] [2024-11-10 01:57:51,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 01:57:51,869 INFO L204 MainTranslator]: Completed translation [2024-11-10 01:57:51,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51 WrapperNode [2024-11-10 01:57:51,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 01:57:51,871 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 01:57:51,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 01:57:51,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 01:57:51,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,908 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2024-11-10 01:57:51,908 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 01:57:51,909 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 01:57:51,909 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 01:57:51,909 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 01:57:51,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,923 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,947 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]. [2024-11-10 01:57:51,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,952 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,966 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 01:57:51,967 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 01:57:51,967 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 01:57:51,967 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 01:57:51,968 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (1/1) ... [2024-11-10 01:57:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 01:57:51,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:57:52,016 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) [2024-11-10 01:57:52,019 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 [2024-11-10 01:57:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 01:57:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 01:57:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 01:57:52,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 01:57:52,175 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 01:57:52,182 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 01:57:52,421 INFO L? ?]: Removed 26 outVars from TransFormulas that were not future-live. [2024-11-10 01:57:52,422 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 01:57:52,458 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 01:57:52,462 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 01:57:52,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 01:57:52 BoogieIcfgContainer [2024-11-10 01:57:52,463 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 01:57:52,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 01:57:52,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 01:57:52,473 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 01:57:52,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 01:57:51" (1/3) ... [2024-11-10 01:57:52,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6770806b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:57:52, skipping insertion in model container [2024-11-10 01:57:52,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:57:51" (2/3) ... [2024-11-10 01:57:52,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6770806b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:57:52, skipping insertion in model container [2024-11-10 01:57:52,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 01:57:52" (3/3) ... [2024-11-10 01:57:52,479 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.count4.c [2024-11-10 01:57:52,498 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 01:57:52,498 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 01:57:52,574 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 01:57:52,581 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;@1f84c941, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 01:57:52,582 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-10 01:57:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 01:57:52,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:57:52,599 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:57:52,599 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:57:52,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:57:52,606 INFO L85 PathProgramCache]: Analyzing trace with hash 194694780, now seen corresponding path program 1 times [2024-11-10 01:57:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:57:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079833122] [2024-11-10 01:57:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:57:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:57:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079833122] [2024-11-10 01:57:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079833122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 01:57:53,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 01:57:53,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 01:57:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455043390] [2024-11-10 01:57:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 01:57:53,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 01:57:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:57:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 01:57:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 01:57:53,284 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:57:53,375 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-11-10 01:57:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 01:57:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-10 01:57:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:57:53,386 INFO L225 Difference]: With dead ends: 34 [2024-11-10 01:57:53,387 INFO L226 Difference]: Without dead ends: 19 [2024-11-10 01:57:53,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-10 01:57:53,394 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 01:57:53,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 01:57:53,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-10 01:57:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-11-10 01:57:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-10 01:57:53,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2024-11-10 01:57:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:57:53,433 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-10 01:57:53,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-10 01:57:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-10 01:57:53,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:57:53,435 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:57:53,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 01:57:53,435 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:57:53,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:57:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 61717544, now seen corresponding path program 1 times [2024-11-10 01:57:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:57:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731444437] [2024-11-10 01:57:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:57:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:53,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:57:53,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731444437] [2024-11-10 01:57:53,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731444437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:57:53,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097835194] [2024-11-10 01:57:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:53,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:57:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:57:53,749 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) [2024-11-10 01:57:53,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 01:57:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:53,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 01:57:53,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:57:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:54,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:57:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097835194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 01:57:54,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 01:57:54,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 14 [2024-11-10 01:57:54,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466674127] [2024-11-10 01:57:54,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 01:57:54,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 01:57:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:57:54,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 01:57:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-10 01:57:54,307 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:57:54,481 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-10 01:57:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 01:57:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-10 01:57:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:57:54,485 INFO L225 Difference]: With dead ends: 25 [2024-11-10 01:57:54,485 INFO L226 Difference]: Without dead ends: 22 [2024-11-10 01:57:54,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-11-10 01:57:54,487 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 01:57:54,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 01:57:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-10 01:57:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-11-10 01:57:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-10 01:57:54,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2024-11-10 01:57:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:57:54,492 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-10 01:57:54,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-10 01:57:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-10 01:57:54,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:57:54,493 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:57:54,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 01:57:54,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:57:54,698 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:57:54,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:57:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2100184568, now seen corresponding path program 1 times [2024-11-10 01:57:54,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:57:54,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194126639] [2024-11-10 01:57:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:54,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:57:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:57:54,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194126639] [2024-11-10 01:57:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194126639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 01:57:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 01:57:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 01:57:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798877112] [2024-11-10 01:57:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 01:57:54,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 01:57:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:57:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 01:57:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 01:57:54,878 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:57:54,924 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-11-10 01:57:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 01:57:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-10 01:57:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:57:54,925 INFO L225 Difference]: With dead ends: 38 [2024-11-10 01:57:54,925 INFO L226 Difference]: Without dead ends: 25 [2024-11-10 01:57:54,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 01:57:54,927 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 01:57:54,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 01:57:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-10 01:57:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-10 01:57:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-10 01:57:54,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2024-11-10 01:57:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:57:54,933 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-10 01:57:54,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-10 01:57:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 01:57:54,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:57:54,934 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:57:54,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 01:57:54,935 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:57:54,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:57:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -219754866, now seen corresponding path program 1 times [2024-11-10 01:57:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:57:54,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051202637] [2024-11-10 01:57:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:57:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:55,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:57:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051202637] [2024-11-10 01:57:55,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051202637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:57:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115047363] [2024-11-10 01:57:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:55,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:57:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:57:55,327 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) [2024-11-10 01:57:55,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 01:57:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:55,397 WARN L253 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-10 01:57:55,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:57:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:55,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:57:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115047363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 01:57:56,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 01:57:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 12] total 23 [2024-11-10 01:57:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226276795] [2024-11-10 01:57:56,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 01:57:56,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 01:57:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:57:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 01:57:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-10 01:57:56,075 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:57:56,235 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2024-11-10 01:57:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 01:57:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-10 01:57:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:57:56,236 INFO L225 Difference]: With dead ends: 42 [2024-11-10 01:57:56,236 INFO L226 Difference]: Without dead ends: 29 [2024-11-10 01:57:56,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-10 01:57:56,238 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 01:57:56,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 56 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 01:57:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-10 01:57:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-11-10 01:57:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-10 01:57:56,247 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2024-11-10 01:57:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:57:56,248 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-10 01:57:56,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-10 01:57:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-10 01:57:56,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:57:56,249 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:57:56,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 01:57:56,449 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,SelfDestructingSolverStorable3 [2024-11-10 01:57:56,450 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:57:56,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:57:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1940549770, now seen corresponding path program 1 times [2024-11-10 01:57:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:57:56,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362813811] [2024-11-10 01:57:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:57:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:57:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362813811] [2024-11-10 01:57:56,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362813811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:57:56,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518839488] [2024-11-10 01:57:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:56,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:57:56,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:57:56,746 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) [2024-11-10 01:57:56,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 01:57:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:56,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-10 01:57:56,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:57:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:57,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:57:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:57,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518839488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 01:57:57,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 01:57:57,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 23 [2024-11-10 01:57:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895462718] [2024-11-10 01:57:57,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 01:57:57,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 01:57:57,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:57:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 01:57:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-10 01:57:57,444 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:57:57,606 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-11-10 01:57:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 01:57:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-10 01:57:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:57:57,607 INFO L225 Difference]: With dead ends: 54 [2024-11-10 01:57:57,607 INFO L226 Difference]: Without dead ends: 41 [2024-11-10 01:57:57,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-11-10 01:57:57,609 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 01:57:57,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 53 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 01:57:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-10 01:57:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-11-10 01:57:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-10 01:57:57,615 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2024-11-10 01:57:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:57:57,618 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-10 01:57:57,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:57:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-10 01:57:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-10 01:57:57,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:57:57,619 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:57:57,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 01:57:57,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:57:57,824 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:57:57,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:57:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -873466308, now seen corresponding path program 2 times [2024-11-10 01:57:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:57:57,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268458023] [2024-11-10 01:57:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:57:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:57:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:57:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:57:58,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268458023] [2024-11-10 01:57:58,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268458023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:57:58,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103025604] [2024-11-10 01:57:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 01:57:58,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:57:58,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:57:58,313 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) [2024-11-10 01:57:58,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 01:57:58,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 01:57:58,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 01:57:58,417 WARN L253 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-10 01:57:58,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:57:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:57:58,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:58:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:58:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103025604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 01:58:02,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 01:58:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 16] total 31 [2024-11-10 01:58:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445213049] [2024-11-10 01:58:02,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 01:58:02,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-10 01:58:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:58:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-10 01:58:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2024-11-10 01:58:02,488 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:58:03,167 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-11-10 01:58:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 01:58:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-10 01:58:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:58:03,169 INFO L225 Difference]: With dead ends: 46 [2024-11-10 01:58:03,169 INFO L226 Difference]: Without dead ends: 43 [2024-11-10 01:58:03,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2024-11-10 01:58:03,170 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 01:58:03,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 01:58:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-10 01:58:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2024-11-10 01:58:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-10 01:58:03,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2024-11-10 01:58:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:58:03,179 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-10 01:58:03,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-10 01:58:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-10 01:58:03,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:58:03,180 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:58:03,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 01:58:03,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:58:03,385 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:58:03,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:58:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1296286436, now seen corresponding path program 1 times [2024-11-10 01:58:03,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:58:03,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166877368] [2024-11-10 01:58:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:58:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:58:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:58:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 01:58:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:58:03,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166877368] [2024-11-10 01:58:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166877368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:58:03,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963838180] [2024-11-10 01:58:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:58:03,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:58:03,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:58:03,575 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) [2024-11-10 01:58:03,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 01:58:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:58:03,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-10 01:58:03,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:58:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 01:58:03,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:58:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-10 01:58:04,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963838180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 01:58:04,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 01:58:04,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 20 [2024-11-10 01:58:04,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102112385] [2024-11-10 01:58:04,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 01:58:04,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 01:58:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:58:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 01:58:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-10 01:58:04,119 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:58:04,258 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-11-10 01:58:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 01:58:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-10 01:58:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:58:04,259 INFO L225 Difference]: With dead ends: 68 [2024-11-10 01:58:04,259 INFO L226 Difference]: Without dead ends: 55 [2024-11-10 01:58:04,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-11-10 01:58:04,260 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 01:58:04,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 42 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 01:58:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-10 01:58:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-10 01:58:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-10 01:58:04,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 33 [2024-11-10 01:58:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:58:04,268 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-10 01:58:04,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-10 01:58:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-10 01:58:04,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:58:04,269 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:58:04,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 01:58:04,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:58:04,470 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:58:04,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:58:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash 629206818, now seen corresponding path program 1 times [2024-11-10 01:58:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:58:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451231324] [2024-11-10 01:58:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:58:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:58:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:58:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 01:58:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:58:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451231324] [2024-11-10 01:58:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451231324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:58:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235910566] [2024-11-10 01:58:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:58:04,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:58:04,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:58:04,688 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) [2024-11-10 01:58:04,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 01:58:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:58:04,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-10 01:58:04,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:58:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 01:58:05,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:58:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:58:09,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235910566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 01:58:09,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 01:58:09,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 18] total 32 [2024-11-10 01:58:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207684187] [2024-11-10 01:58:09,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 01:58:09,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-10 01:58:09,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 01:58:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-10 01:58:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-11-10 01:58:09,534 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 01:58:09,863 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-11-10 01:58:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 01:58:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-10 01:58:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 01:58:09,864 INFO L225 Difference]: With dead ends: 65 [2024-11-10 01:58:09,864 INFO L226 Difference]: Without dead ends: 42 [2024-11-10 01:58:09,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2024-11-10 01:58:09,865 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 01:58:09,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 71 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 01:58:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-10 01:58:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2024-11-10 01:58:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2024-11-10 01:58:09,870 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2024-11-10 01:58:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 01:58:09,870 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2024-11-10 01:58:09,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 01:58:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2024-11-10 01:58:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-10 01:58:09,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 01:58:09,872 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 01:58:09,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 01:58:10,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:58:10,073 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 01:58:10,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 01:58:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -712777526, now seen corresponding path program 2 times [2024-11-10 01:58:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 01:58:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102539922] [2024-11-10 01:58:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 01:58:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 01:58:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 01:58:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:58:10,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 01:58:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102539922] [2024-11-10 01:58:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102539922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 01:58:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501017556] [2024-11-10 01:58:10,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 01:58:10,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 01:58:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 01:58:10,698 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) [2024-11-10 01:58:10,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 01:58:10,868 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 01:58:10,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 01:58:10,870 WARN L253 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-10 01:58:10,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 01:58:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 01:58:12,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 01:58:54,631 WARN L286 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 129 DAG size of output: 97 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-10 01:59:18,984 WARN L286 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)