./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.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 d1f3c30f17cc68a40d1b0b31634de48071c9ae3c0808bd553c6c6ce86d938069 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 23:24:39,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 23:24:39,507 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-10-12 23:24:39,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 23:24:39,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 23:24:39,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 23:24:39,542 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 23:24:39,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 23:24:39,543 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 23:24:39,544 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 23:24:39,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 23:24:39,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 23:24:39,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 23:24:39,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 23:24:39,548 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 23:24:39,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 23:24:39,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 23:24:39,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 23:24:39,549 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 23:24:39,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 23:24:39,550 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 23:24:39,554 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 23:24:39,554 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 23:24:39,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 23:24:39,554 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 23:24:39,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 23:24:39,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 23:24:39,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 23:24:39,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 23:24:39,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 23:24:39,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 23:24:39,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 23:24:39,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 23:24:39,556 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 23:24:39,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 23:24:39,557 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 23:24:39,557 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 23:24:39,557 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 23:24:39,558 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 23:24:39,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1f3c30f17cc68a40d1b0b31634de48071c9ae3c0808bd553c6c6ce86d938069 [2024-10-12 23:24:39,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 23:24:39,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 23:24:39,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 23:24:39,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 23:24:39,838 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 23:24:39,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2024-10-12 23:24:41,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 23:24:41,420 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 23:24:41,420 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2024-10-12 23:24:41,427 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2667e0710/e326ddc2e9694b6ea5df818ad9ad30ef/FLAGedf137b56 [2024-10-12 23:24:41,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2667e0710/e326ddc2e9694b6ea5df818ad9ad30ef [2024-10-12 23:24:41,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 23:24:41,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 23:24:41,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 23:24:41,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 23:24:41,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 23:24:41,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ed1af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41, skipping insertion in model container [2024-10-12 23:24:41,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,476 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 23:24:41,626 WARN L248 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.recount4.c[1258,1271] [2024-10-12 23:24:41,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 23:24:41,696 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 23:24:41,707 WARN L248 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.recount4.c[1258,1271] [2024-10-12 23:24:41,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 23:24:41,741 INFO L204 MainTranslator]: Completed translation [2024-10-12 23:24:41,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41 WrapperNode [2024-10-12 23:24:41,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 23:24:41,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 23:24:41,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 23:24:41,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 23:24:41,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,796 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2024-10-12 23:24:41,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 23:24:41,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 23:24:41,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 23:24:41,797 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 23:24:41,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,814 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,838 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]. [2024-10-12 23:24:41,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,867 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 23:24:41,868 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 23:24:41,868 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 23:24:41,868 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 23:24:41,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (1/1) ... [2024-10-12 23:24:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 23:24:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:24:41,904 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) [2024-10-12 23:24:41,911 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 [2024-10-12 23:24:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 23:24:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 23:24:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 23:24:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 23:24:42,035 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 23:24:42,039 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 23:24:42,243 INFO L? ?]: Removed 40 outVars from TransFormulas that were not future-live. [2024-10-12 23:24:42,244 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 23:24:42,263 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 23:24:42,263 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-12 23:24:42,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:24:42 BoogieIcfgContainer [2024-10-12 23:24:42,264 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 23:24:42,267 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 23:24:42,267 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 23:24:42,270 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 23:24:42,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:24:41" (1/3) ... [2024-10-12 23:24:42,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e23e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:24:42, skipping insertion in model container [2024-10-12 23:24:42,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:24:41" (2/3) ... [2024-10-12 23:24:42,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e23e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:24:42, skipping insertion in model container [2024-10-12 23:24:42,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:24:42" (3/3) ... [2024-10-12 23:24:42,273 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.recount4.c [2024-10-12 23:24:42,289 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 23:24:42,290 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 23:24:42,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 23:24:42,359 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;@6c45bc0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 23:24:42,359 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 23:24:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 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) [2024-10-12 23:24:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 23:24:42,370 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:42,371 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:42,371 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:42,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash 716087188, now seen corresponding path program 1 times [2024-10-12 23:24:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:42,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266601894] [2024-10-12 23:24:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:42,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:42,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266601894] [2024-10-12 23:24:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266601894] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 23:24:42,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 23:24:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 23:24:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479015202] [2024-10-12 23:24:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 23:24:42,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 23:24:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 23:24:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 23:24:42,998 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 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 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-12 23:24:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:43,087 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2024-10-12 23:24:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 23:24:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2024-10-12 23:24:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:43,096 INFO L225 Difference]: With dead ends: 51 [2024-10-12 23:24:43,096 INFO L226 Difference]: Without dead ends: 33 [2024-10-12 23:24:43,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-12 23:24:43,104 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:43,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 23:24:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-12 23:24:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-10-12 23:24:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2024-10-12 23:24:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-10-12 23:24:43,135 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 10 [2024-10-12 23:24:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:43,135 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-10-12 23:24:43,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-12 23:24:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-10-12 23:24:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 23:24:43,136 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:43,136 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:43,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 23:24:43,137 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:43,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1032456373, now seen corresponding path program 1 times [2024-10-12 23:24:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321260176] [2024-10-12 23:24:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321260176] [2024-10-12 23:24:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321260176] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 23:24:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049576897] [2024-10-12 23:24:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:43,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:43,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:24:43,487 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) [2024-10-12 23:24:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 23:24:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:43,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-12 23:24:43,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 23:24:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:43,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 23:24:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:44,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049576897] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 23:24:44,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 23:24:44,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2024-10-12 23:24:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969112630] [2024-10-12 23:24:44,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 23:24:44,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 23:24:44,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 23:24:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-12 23:24:44,063 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 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) [2024-10-12 23:24:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:44,161 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-10-12 23:24:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 23:24:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 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 19 [2024-10-12 23:24:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:44,163 INFO L225 Difference]: With dead ends: 46 [2024-10-12 23:24:44,164 INFO L226 Difference]: Without dead ends: 44 [2024-10-12 23:24:44,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-10-12 23:24:44,166 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:44,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 187 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 23:24:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-12 23:24:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2024-10-12 23:24:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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) [2024-10-12 23:24:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2024-10-12 23:24:44,174 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 19 [2024-10-12 23:24:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:44,174 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2024-10-12 23:24:44,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 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) [2024-10-12 23:24:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2024-10-12 23:24:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 23:24:44,175 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:44,175 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:44,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 23:24:44,379 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 [2024-10-12 23:24:44,380 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:44,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1045611908, now seen corresponding path program 1 times [2024-10-12 23:24:44,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:44,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112946331] [2024-10-12 23:24:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:44,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112946331] [2024-10-12 23:24:44,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112946331] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 23:24:44,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 23:24:44,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-12 23:24:44,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193505158] [2024-10-12 23:24:44,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 23:24:44,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 23:24:44,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 23:24:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-12 23:24:44,782 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2024-10-12 23:24:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:44,951 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-10-12 23:24:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 23:24:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2024-10-12 23:24:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:44,952 INFO L225 Difference]: With dead ends: 83 [2024-10-12 23:24:44,952 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 23:24:44,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-12 23:24:44,954 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:44,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 63 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 23:24:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 23:24:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2024-10-12 23:24:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 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) [2024-10-12 23:24:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2024-10-12 23:24:44,960 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 20 [2024-10-12 23:24:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:44,960 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2024-10-12 23:24:44,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2024-10-12 23:24:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2024-10-12 23:24:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 23:24:44,961 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:44,961 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:44,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 23:24:44,962 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:44,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -784698637, now seen corresponding path program 1 times [2024-10-12 23:24:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164297535] [2024-10-12 23:24:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:45,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:45,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164297535] [2024-10-12 23:24:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164297535] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 23:24:45,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 23:24:45,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-12 23:24:45,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528336166] [2024-10-12 23:24:45,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 23:24:45,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 23:24:45,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 23:24:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-12 23:24:45,428 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2024-10-12 23:24:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:45,660 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2024-10-12 23:24:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 23:24:45,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 [2024-10-12 23:24:45,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:45,661 INFO L225 Difference]: With dead ends: 93 [2024-10-12 23:24:45,662 INFO L226 Difference]: Without dead ends: 65 [2024-10-12 23:24:45,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 23:24:45,663 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:45,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 86 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 23:24:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-12 23:24:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2024-10-12 23:24:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 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) [2024-10-12 23:24:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-10-12 23:24:45,671 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 21 [2024-10-12 23:24:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:45,671 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-10-12 23:24:45,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2024-10-12 23:24:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-10-12 23:24:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 23:24:45,673 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:45,673 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:45,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 23:24:45,675 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:45,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1212514519, now seen corresponding path program 1 times [2024-10-12 23:24:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:45,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60832477] [2024-10-12 23:24:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:46,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60832477] [2024-10-12 23:24:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60832477] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 23:24:46,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286440916] [2024-10-12 23:24:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:46,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:24:46,444 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) [2024-10-12 23:24:46,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 23:24:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:46,558 WARN L253 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-12 23:24:46,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 23:24:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:47,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 23:24:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286440916] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 23:24:49,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 23:24:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 38 [2024-10-12 23:24:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886483338] [2024-10-12 23:24:49,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 23:24:49,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-12 23:24:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-12 23:24:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2024-10-12 23:24:49,707 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 38 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) [2024-10-12 23:24:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:51,490 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2024-10-12 23:24:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-12 23:24:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 38 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 22 [2024-10-12 23:24:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:51,493 INFO L225 Difference]: With dead ends: 157 [2024-10-12 23:24:51,493 INFO L226 Difference]: Without dead ends: 129 [2024-10-12 23:24:51,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=799, Invalid=4171, Unknown=0, NotChecked=0, Total=4970 [2024-10-12 23:24:51,496 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 234 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:51,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 87 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 23:24:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-12 23:24:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 83. [2024-10-12 23:24:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.353658536585366) internal successors, (111), 82 states have internal predecessors, (111), 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) [2024-10-12 23:24:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2024-10-12 23:24:51,504 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 22 [2024-10-12 23:24:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:51,505 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2024-10-12 23:24:51,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 38 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) [2024-10-12 23:24:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2024-10-12 23:24:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 23:24:51,506 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:51,506 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:51,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 23:24:51,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:51,707 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:51,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1253872257, now seen corresponding path program 1 times [2024-10-12 23:24:51,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:51,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134708145] [2024-10-12 23:24:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 23:24:52,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134708145] [2024-10-12 23:24:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134708145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 23:24:52,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 23:24:52,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-12 23:24:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651663392] [2024-10-12 23:24:52,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 23:24:52,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 23:24:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 23:24:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-12 23:24:52,184 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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) [2024-10-12 23:24:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:52,251 INFO L93 Difference]: Finished difference Result 156 states and 209 transitions. [2024-10-12 23:24:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 23:24:52,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 40 [2024-10-12 23:24:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:52,253 INFO L225 Difference]: With dead ends: 156 [2024-10-12 23:24:52,253 INFO L226 Difference]: Without dead ends: 106 [2024-10-12 23:24:52,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-12 23:24:52,254 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 18 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:52,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 194 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 23:24:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-12 23:24:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-10-12 23:24:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 87 states have internal predecessors, (118), 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) [2024-10-12 23:24:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2024-10-12 23:24:52,261 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 40 [2024-10-12 23:24:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:52,262 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2024-10-12 23:24:52,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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) [2024-10-12 23:24:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2024-10-12 23:24:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 23:24:52,263 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:52,263 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:52,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-12 23:24:52,264 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:52,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1930580451, now seen corresponding path program 1 times [2024-10-12 23:24:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:52,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278803010] [2024-10-12 23:24:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 23:24:52,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:52,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278803010] [2024-10-12 23:24:52,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278803010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 23:24:52,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492498252] [2024-10-12 23:24:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:24:52,514 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) [2024-10-12 23:24:52,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 23:24:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:52,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 23:24:52,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 23:24:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 23:24:52,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 23:24:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 23:24:52,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492498252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 23:24:52,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 23:24:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-10-12 23:24:52,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294063832] [2024-10-12 23:24:52,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 23:24:52,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 23:24:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 23:24:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-10-12 23:24:52,890 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 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) [2024-10-12 23:24:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:52,984 INFO L93 Difference]: Finished difference Result 162 states and 212 transitions. [2024-10-12 23:24:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 23:24:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 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 41 [2024-10-12 23:24:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:52,985 INFO L225 Difference]: With dead ends: 162 [2024-10-12 23:24:52,985 INFO L226 Difference]: Without dead ends: 101 [2024-10-12 23:24:52,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-10-12 23:24:52,987 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:52,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 83 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 23:24:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-12 23:24:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2024-10-12 23:24:52,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.353658536585366) internal successors, (111), 82 states have internal predecessors, (111), 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) [2024-10-12 23:24:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2024-10-12 23:24:52,992 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 41 [2024-10-12 23:24:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:52,993 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2024-10-12 23:24:52,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 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) [2024-10-12 23:24:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2024-10-12 23:24:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 23:24:52,994 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:52,994 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:24:53,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 23:24:53,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:53,195 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:53,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1312143242, now seen corresponding path program 1 times [2024-10-12 23:24:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:53,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793932440] [2024-10-12 23:24:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:24:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793932440] [2024-10-12 23:24:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793932440] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 23:24:54,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139153951] [2024-10-12 23:24:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:54,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:24:54,196 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) [2024-10-12 23:24:54,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 23:24:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:24:54,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-10-12 23:24:54,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 23:24:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:55,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 23:24:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:24:56,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139153951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 23:24:56,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 23:24:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 19] total 48 [2024-10-12 23:24:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957384739] [2024-10-12 23:24:56,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 23:24:56,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-12 23:24:56,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:24:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-12 23:24:56,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2024-10-12 23:24:56,675 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 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) [2024-10-12 23:24:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:24:58,964 INFO L93 Difference]: Finished difference Result 349 states and 458 transitions. [2024-10-12 23:24:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-12 23:24:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 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 41 [2024-10-12 23:24:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:24:58,966 INFO L225 Difference]: With dead ends: 349 [2024-10-12 23:24:58,966 INFO L226 Difference]: Without dead ends: 298 [2024-10-12 23:24:58,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1075, Invalid=8431, Unknown=0, NotChecked=0, Total=9506 [2024-10-12 23:24:58,969 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 499 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 23:24:58,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 62 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 23:24:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-10-12 23:24:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 101. [2024-10-12 23:24:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.36) internal successors, (136), 100 states have internal predecessors, (136), 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) [2024-10-12 23:24:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 136 transitions. [2024-10-12 23:24:58,979 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 136 transitions. Word has length 41 [2024-10-12 23:24:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:24:58,979 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 136 transitions. [2024-10-12 23:24:58,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 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) [2024-10-12 23:24:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 136 transitions. [2024-10-12 23:24:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 23:24:58,981 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:24:58,981 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-12 23:24:58,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 23:24:59,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:24:59,186 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:24:59,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:24:59,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2125409112, now seen corresponding path program 2 times [2024-10-12 23:24:59,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:24:59,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640367008] [2024-10-12 23:24:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:24:59,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:24:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:25:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 23:25:01,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:25:01,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640367008] [2024-10-12 23:25:01,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640367008] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 23:25:01,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756500050] [2024-10-12 23:25:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 23:25:01,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:25:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:25:01,111 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) [2024-10-12 23:25:01,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 23:25:01,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 23:25:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 23:25:01,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-10-12 23:25:01,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 23:25:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:25:02,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 23:25:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 23:25:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756500050] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 23:25:12,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 23:25:12,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 71 [2024-10-12 23:25:12,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352331822] [2024-10-12 23:25:12,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 23:25:12,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-10-12 23:25:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 23:25:12,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-10-12 23:25:12,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=4783, Unknown=0, NotChecked=0, Total=5112 [2024-10-12 23:25:12,281 INFO L87 Difference]: Start difference. First operand 101 states and 136 transitions. Second operand has 72 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 71 states have internal predecessors, (130), 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) [2024-10-12 23:25:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 23:25:20,143 INFO L93 Difference]: Finished difference Result 457 states and 594 transitions. [2024-10-12 23:25:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-10-12 23:25:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 71 states have internal predecessors, (130), 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 45 [2024-10-12 23:25:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 23:25:20,146 INFO L225 Difference]: With dead ends: 457 [2024-10-12 23:25:20,146 INFO L226 Difference]: Without dead ends: 367 [2024-10-12 23:25:20,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9976 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3601, Invalid=28619, Unknown=0, NotChecked=0, Total=32220 [2024-10-12 23:25:20,151 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 827 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-12 23:25:20,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 112 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-12 23:25:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-10-12 23:25:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 113. [2024-10-12 23:25:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3571428571428572) internal successors, (152), 112 states have internal predecessors, (152), 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) [2024-10-12 23:25:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 152 transitions. [2024-10-12 23:25:20,160 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 152 transitions. Word has length 45 [2024-10-12 23:25:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 23:25:20,160 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 152 transitions. [2024-10-12 23:25:20,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 71 states have internal predecessors, (130), 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) [2024-10-12 23:25:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 152 transitions. [2024-10-12 23:25:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 23:25:20,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 23:25:20,162 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 23:25:20,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 23:25:20,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:25:20,363 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 23:25:20,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 23:25:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1553084950, now seen corresponding path program 2 times [2024-10-12 23:25:20,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 23:25:20,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310150346] [2024-10-12 23:25:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 23:25:20,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 23:25:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 23:25:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:25:22,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 23:25:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310150346] [2024-10-12 23:25:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310150346] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 23:25:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821017696] [2024-10-12 23:25:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 23:25:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 23:25:22,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 23:25:22,396 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) [2024-10-12 23:25:22,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 23:25:22,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 23:25:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 23:25:22,537 WARN L253 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-10-12 23:25:22,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 23:25:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 23:25:24,094 INFO L311 TraceCheckSpWp]: Computing backward predicates...