./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/nla-digbench-scaling/dijkstra-u_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:45:20,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:45:21,029 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:45:21,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:45:21,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:45:21,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:45:21,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:45:21,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:45:21,081 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:45:21,082 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:45:21,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:45:21,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:45:21,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:45:21,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:45:21,085 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:45:21,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:45:21,086 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:45:21,088 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:45:21,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:45:21,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:45:21,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:45:21,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:45:21,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:45:21,090 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:45:21,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:45:21,091 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:45:21,091 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:45:21,091 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:45:21,092 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:45:21,092 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:45:21,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:45:21,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:45:21,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:45:21,093 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:45:21,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:45:21,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:45:21,094 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:45:21,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:45:21,095 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:45:21,095 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:45:21,095 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:45:21,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:45:21,096 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2024-10-12 18:45:21,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:45:21,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:45:21,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:45:21,350 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:45:21,350 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:45:21,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2024-10-12 18:45:22,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:45:22,947 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:45:22,948 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2024-10-12 18:45:22,959 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68f6a4592/785c79f931cd4b48a4e68624938471cf/FLAGcfac993c0 [2024-10-12 18:45:22,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68f6a4592/785c79f931cd4b48a4e68624938471cf [2024-10-12 18:45:22,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:45:22,983 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:45:22,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:45:22,985 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:45:22,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:45:22,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:45:22" (1/1) ... [2024-10-12 18:45:22,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75596996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:22, skipping insertion in model container [2024-10-12 18:45:22,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:45:22" (1/1) ... [2024-10-12 18:45:23,010 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:45:23,166 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/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2024-10-12 18:45:23,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:45:23,201 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:45:23,216 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/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2024-10-12 18:45:23,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:45:23,249 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:45:23,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23 WrapperNode [2024-10-12 18:45:23,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:45:23,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:45:23,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:45:23,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:45:23,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,281 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-10-12 18:45:23,282 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:45:23,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:45:23,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:45:23,283 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:45:23,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,304 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 18:45:23,304 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:45:23,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:45:23,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:45:23,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:45:23,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (1/1) ... [2024-10-12 18:45:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:45:23,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:45:23,346 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 18:45:23,348 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 18:45:23,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:45:23,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:45:23,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:45:23,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:45:23,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:45:23,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:45:23,443 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:45:23,444 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:45:23,652 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-12 18:45:23,652 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:45:23,676 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:45:23,677 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:45:23,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:45:23 BoogieIcfgContainer [2024-10-12 18:45:23,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:45:23,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:45:23,680 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:45:23,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:45:23,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:45:22" (1/3) ... [2024-10-12 18:45:23,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1613a479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:45:23, skipping insertion in model container [2024-10-12 18:45:23,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:45:23" (2/3) ... [2024-10-12 18:45:23,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1613a479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:45:23, skipping insertion in model container [2024-10-12 18:45:23,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:45:23" (3/3) ... [2024-10-12 18:45:23,686 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2024-10-12 18:45:23,703 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:45:23,703 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:45:23,774 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:45:23,782 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;@11ab35a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:45:23,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:45:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 18:45:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-12 18:45:23,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:23,797 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:23,797 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:23,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2020981481, now seen corresponding path program 1 times [2024-10-12 18:45:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:23,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517198408] [2024-10-12 18:45:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:23,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:23,984 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 18:45:23,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:23,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517198408] [2024-10-12 18:45:23,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517198408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:45:23,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:45:23,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:45:23,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221950092] [2024-10-12 18:45:23,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:45:23,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:45:23,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:45:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:45:24,016 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:45:24,039 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2024-10-12 18:45:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:45:24,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-12 18:45:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:45:24,050 INFO L225 Difference]: With dead ends: 52 [2024-10-12 18:45:24,050 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 18:45:24,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:45:24,056 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:45:24,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:45:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 18:45:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-12 18:45:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 18:45:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2024-10-12 18:45:24,109 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 9 [2024-10-12 18:45:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:45:24,110 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2024-10-12 18:45:24,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2024-10-12 18:45:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 18:45:24,111 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:24,111 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:24,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:45:24,111 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:24,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 10324464, now seen corresponding path program 1 times [2024-10-12 18:45:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611075324] [2024-10-12 18:45:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:24,286 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 18:45:24,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:24,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611075324] [2024-10-12 18:45:24,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611075324] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:45:24,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:45:24,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:45:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633995717] [2024-10-12 18:45:24,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:45:24,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 18:45:24,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 18:45:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:45:24,297 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:45:24,328 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2024-10-12 18:45:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 18:45:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-12 18:45:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:45:24,330 INFO L225 Difference]: With dead ends: 46 [2024-10-12 18:45:24,332 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:45:24,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:45:24,334 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:45:24,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:45:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:45:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-12 18:45:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 18:45:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2024-10-12 18:45:24,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 11 [2024-10-12 18:45:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:45:24,345 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2024-10-12 18:45:24,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2024-10-12 18:45:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 18:45:24,346 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:24,346 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:24,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:45:24,347 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:24,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -21038528, now seen corresponding path program 1 times [2024-10-12 18:45:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8585371] [2024-10-12 18:45:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:24,512 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 18:45:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8585371] [2024-10-12 18:45:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8585371] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:45:24,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:45:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:45:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918972700] [2024-10-12 18:45:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:45:24,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:45:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:45:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:45:24,518 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:45:24,558 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-10-12 18:45:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:45:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 18:45:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:45:24,562 INFO L225 Difference]: With dead ends: 40 [2024-10-12 18:45:24,562 INFO L226 Difference]: Without dead ends: 31 [2024-10-12 18:45:24,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:45:24,564 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:45:24,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 100 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:45:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-12 18:45:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-10-12 18:45:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 18:45:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2024-10-12 18:45:24,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 12 [2024-10-12 18:45:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:45:24,572 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2024-10-12 18:45:24,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2024-10-12 18:45:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 18:45:24,572 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:24,573 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:24,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 18:45:24,573 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:24,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash -19548978, now seen corresponding path program 1 times [2024-10-12 18:45:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:24,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392549048] [2024-10-12 18:45:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:24,922 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 18:45:24,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:24,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392549048] [2024-10-12 18:45:24,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392549048] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:45:24,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:45:24,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-12 18:45:24,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837819584] [2024-10-12 18:45:24,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:45:24,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:45:24,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:45:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:45:24,927 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:29,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:45:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:45:29,123 INFO L93 Difference]: Finished difference Result 60 states and 90 transitions. [2024-10-12 18:45:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:45:29,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 18:45:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:45:29,126 INFO L225 Difference]: With dead ends: 60 [2024-10-12 18:45:29,126 INFO L226 Difference]: Without dead ends: 41 [2024-10-12 18:45:29,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:45:29,128 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:45:29,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 149 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-10-12 18:45:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-12 18:45:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-12 18:45:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-12 18:45:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2024-10-12 18:45:29,152 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 12 [2024-10-12 18:45:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:45:29,153 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2024-10-12 18:45:29,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2024-10-12 18:45:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 18:45:29,154 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:29,154 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:29,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 18:45:29,154 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:29,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1459140795, now seen corresponding path program 1 times [2024-10-12 18:45:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081481904] [2024-10-12 18:45:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081481904] [2024-10-12 18:45:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081481904] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:45:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928341647] [2024-10-12 18:45:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:29,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:45:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:45:29,233 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 18:45:29,234 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 18:45:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:29,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 18:45:29,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:45:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:29,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:45:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:29,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928341647] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:45:29,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:45:29,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-10-12 18:45:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104174406] [2024-10-12 18:45:29,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:45:29,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:45:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:45:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:45:29,414 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:33,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:45:37,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:45:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:45:37,669 INFO L93 Difference]: Finished difference Result 97 states and 141 transitions. [2024-10-12 18:45:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:45:37,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 18:45:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:45:37,671 INFO L225 Difference]: With dead ends: 97 [2024-10-12 18:45:37,671 INFO L226 Difference]: Without dead ends: 78 [2024-10-12 18:45:37,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:45:37,673 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:45:37,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 191 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-10-12 18:45:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-12 18:45:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2024-10-12 18:45:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-12 18:45:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2024-10-12 18:45:37,687 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 14 [2024-10-12 18:45:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:45:37,688 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2024-10-12 18:45:37,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2024-10-12 18:45:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-12 18:45:37,689 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:37,689 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:37,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:45:37,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:45:37,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:37,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1670178699, now seen corresponding path program 1 times [2024-10-12 18:45:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790449213] [2024-10-12 18:45:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790449213] [2024-10-12 18:45:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790449213] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:45:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636199908] [2024-10-12 18:45:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:37,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:45:37,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:45:38,001 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 18:45:38,002 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 18:45:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:38,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:45:38,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:45:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:38,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:45:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636199908] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:45:38,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:45:38,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-10-12 18:45:38,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447711385] [2024-10-12 18:45:38,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:45:38,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-12 18:45:38,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-12 18:45:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:45:38,161 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:42,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:45:46,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:45:50,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:45:54,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:45:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:45:54,747 INFO L93 Difference]: Finished difference Result 131 states and 187 transitions. [2024-10-12 18:45:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 18:45:54,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-12 18:45:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:45:54,751 INFO L225 Difference]: With dead ends: 131 [2024-10-12 18:45:54,751 INFO L226 Difference]: Without dead ends: 122 [2024-10-12 18:45:54,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-10-12 18:45:54,753 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 149 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 77 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2024-10-12 18:45:54,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 173 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 100 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2024-10-12 18:45:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-12 18:45:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2024-10-12 18:45:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.360655737704918) internal successors, (83), 66 states have internal predecessors, (83), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-10-12 18:45:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 168 transitions. [2024-10-12 18:45:54,775 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 168 transitions. Word has length 15 [2024-10-12 18:45:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:45:54,775 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 168 transitions. [2024-10-12 18:45:54,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:45:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 168 transitions. [2024-10-12 18:45:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-12 18:45:54,776 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:45:54,776 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:45:54,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:45:54,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-12 18:45:54,977 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:45:54,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:45:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1671668249, now seen corresponding path program 1 times [2024-10-12 18:45:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:45:54,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823276024] [2024-10-12 18:45:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:45:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:45:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823276024] [2024-10-12 18:45:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823276024] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:45:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370738053] [2024-10-12 18:45:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:45:55,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:45:55,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:45:55,336 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 18:45:55,337 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 18:45:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:45:55,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 18:45:55,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:45:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:55,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:45:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:45:55,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370738053] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:45:55,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:45:55,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-12 18:45:55,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451624499] [2024-10-12 18:45:55,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:45:55,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 18:45:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:45:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 18:45:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:45:55,872 INFO L87 Difference]: Start difference. First operand 113 states and 168 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:46:01,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:46:06,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:46:10,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-12 18:46:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:46:10,360 INFO L93 Difference]: Finished difference Result 249 states and 380 transitions. [2024-10-12 18:46:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 18:46:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-12 18:46:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:46:10,364 INFO L225 Difference]: With dead ends: 249 [2024-10-12 18:46:10,364 INFO L226 Difference]: Without dead ends: 203 [2024-10-12 18:46:10,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-10-12 18:46:10,366 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:46:10,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 353 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 273 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2024-10-12 18:46:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-12 18:46:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 150. [2024-10-12 18:46:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 94 states have internal predecessors, (109), 51 states have call successors, (51), 11 states have call predecessors, (51), 11 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2024-10-12 18:46:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 207 transitions. [2024-10-12 18:46:10,401 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 207 transitions. Word has length 15 [2024-10-12 18:46:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:46:10,401 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 207 transitions. [2024-10-12 18:46:10,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:46:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 207 transitions. [2024-10-12 18:46:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 18:46:10,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:46:10,403 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:46:10,420 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 18:46:10,603 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 18:46:10,604 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:46:10,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:46:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1600243630, now seen corresponding path program 1 times [2024-10-12 18:46:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:46:10,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634570530] [2024-10-12 18:46:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:46:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:46:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:46:10,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982828613] [2024-10-12 18:46:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:46:10,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:46:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:46:10,635 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 18:46:10,637 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 18:46:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:46:10,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:46:10,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:46:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:46:10,746 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:46:10,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:46:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634570530] [2024-10-12 18:46:10,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:46:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982828613] [2024-10-12 18:46:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982828613] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:46:10,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:46:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:46:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058587823] [2024-10-12 18:46:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:46:10,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:46:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:46:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:46:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:46:10,753 INFO L87 Difference]: Start difference. First operand 150 states and 207 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:46:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:46:10,881 INFO L93 Difference]: Finished difference Result 208 states and 288 transitions. [2024-10-12 18:46:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:46:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-10-12 18:46:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:46:10,885 INFO L225 Difference]: With dead ends: 208 [2024-10-12 18:46:10,886 INFO L226 Difference]: Without dead ends: 200 [2024-10-12 18:46:10,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:46:10,888 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:46:10,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:46:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-10-12 18:46:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2024-10-12 18:46:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 118 states have internal predecessors, (135), 72 states have call successors, (72), 17 states have call predecessors, (72), 16 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2024-10-12 18:46:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 272 transitions. [2024-10-12 18:46:10,942 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 272 transitions. Word has length 22 [2024-10-12 18:46:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:46:10,943 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 272 transitions. [2024-10-12 18:46:10,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:46:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 272 transitions. [2024-10-12 18:46:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:46:10,945 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:46:10,945 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:46:10,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 18:46:11,149 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 18:46:11,150 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:46:11,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:46:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 770870963, now seen corresponding path program 1 times [2024-10-12 18:46:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:46:11,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769533866] [2024-10-12 18:46:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:46:11,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:46:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:46:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528638850] [2024-10-12 18:46:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:46:11,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:46:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:46:11,173 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 18:46:11,178 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 18:46:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:46:11,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 18:46:11,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:46:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:46:11,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:46:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:46:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:46:15,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769533866] [2024-10-12 18:46:15,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:46:15,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528638850] [2024-10-12 18:46:15,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528638850] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:46:15,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:46:15,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-12 18:46:15,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055791290] [2024-10-12 18:46:15,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:46:15,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:46:15,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:46:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:46:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:46:15,484 INFO L87 Difference]: Start difference. First operand 200 states and 272 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:46:25,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:26,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:30,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:35,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:36,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:40,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:44,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:49,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:53,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:46:57,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:47:01,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []