./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.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 e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:43:44,063 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:43:44,109 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:43:44,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:43:44,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:43:44,138 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:43:44,139 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:43:44,139 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:43:44,140 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:43:44,140 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:43:44,140 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:43:44,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:43:44,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:43:44,141 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:43:44,142 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:43:44,142 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:43:44,142 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:43:44,142 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:43:44,143 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:43:44,143 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:43:44,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:43:44,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:43:44,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:43:44,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:43:44,144 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:43:44,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:43:44,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:43:44,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:43:44,145 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:43:44,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:43:44,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:43:44,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:43:44,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:43:44,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:43:44,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:43:44,147 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:43:44,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:43:44,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:43:44,148 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:43:44,148 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:43:44,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:43:44,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:43:44,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 [2024-11-08 14:43:44,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:43:44,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:43:44,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:43:44,360 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:43:44,360 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:43:44,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2024-11-08 14:43:45,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:43:46,126 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:43:46,127 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2024-11-08 14:43:46,133 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2672a7a/29082da0214f406d9510c20855a70b3e/FLAG1b830f62d [2024-11-08 14:43:46,147 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2672a7a/29082da0214f406d9510c20855a70b3e [2024-11-08 14:43:46,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:43:46,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:43:46,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:43:46,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:43:46,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:43:46,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4564c787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46, skipping insertion in model container [2024-11-08 14:43:46,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:43:46,325 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2024-11-08 14:43:46,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:43:46,368 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:43:46,378 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2024-11-08 14:43:46,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:43:46,401 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:43:46,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46 WrapperNode [2024-11-08 14:43:46,402 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:43:46,403 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:43:46,403 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:43:46,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:43:46,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,428 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-08 14:43:46,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:43:46,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:43:46,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:43:46,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:43:46,442 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,444 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,456 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-08 14:43:46,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,458 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,460 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:43:46,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:43:46,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:43:46,464 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:43:46,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (1/1) ... [2024-11-08 14:43:46,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:43:46,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:46,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 14:43:46,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:43:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:43:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:43:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:43:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:43:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:43:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:43:46,579 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:43:46,580 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:43:46,713 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-08 14:43:46,713 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:43:46,727 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:43:46,728 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 14:43:46,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:43:46 BoogieIcfgContainer [2024-11-08 14:43:46,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:43:46,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:43:46,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:43:46,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:43:46,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:43:46" (1/3) ... [2024-11-08 14:43:46,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f98e758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:43:46, skipping insertion in model container [2024-11-08 14:43:46,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:46" (2/3) ... [2024-11-08 14:43:46,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f98e758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:43:46, skipping insertion in model container [2024-11-08 14:43:46,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:43:46" (3/3) ... [2024-11-08 14:43:46,736 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2024-11-08 14:43:46,759 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:43:46,759 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:43:46,823 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:43:46,835 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;@a0e3415, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:43:46,835 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:43:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:43:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 14:43:46,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:46,851 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:46,851 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:46,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2024-11-08 14:43:46,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:46,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619625988] [2024-11-08 14:43:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:47,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619625988] [2024-11-08 14:43:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619625988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:43:47,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:43:47,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:43:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318550978] [2024-11-08 14:43:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:47,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:43:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:47,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:43:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:43:47,144 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2024-11-08 14:43:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:47,158 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-11-08 14:43:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:43:47,159 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 [2024-11-08 14:43:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:47,164 INFO L225 Difference]: With dead ends: 37 [2024-11-08 14:43:47,164 INFO L226 Difference]: Without dead ends: 16 [2024-11-08 14:43:47,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:43:47,169 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:47,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-08 14:43:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-08 14:43:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:43:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-08 14:43:47,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2024-11-08 14:43:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:47,201 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-08 14:43:47,201 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) [2024-11-08 14:43:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-08 14:43:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:43:47,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:47,202 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:47,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:43:47,202 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:47,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2024-11-08 14:43:47,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838738268] [2024-11-08 14:43:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:47,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838738268] [2024-11-08 14:43:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838738268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:43:47,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:43:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:43:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820257736] [2024-11-08 14:43:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:47,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:43:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:43:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:43:47,281 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:47,296 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-08 14:43:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:43:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 14:43:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:47,298 INFO L225 Difference]: With dead ends: 26 [2024-11-08 14:43:47,298 INFO L226 Difference]: Without dead ends: 18 [2024-11-08 14:43:47,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:43:47,299 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:47,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-08 14:43:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-08 14:43:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:43:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-08 14:43:47,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-11-08 14:43:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:47,304 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-08 14:43:47,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-08 14:43:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:43:47,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:47,305 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:47,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:43:47,305 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:47,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:47,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2024-11-08 14:43:47,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:47,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312709601] [2024-11-08 14:43:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:47,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:43:47,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031132793] [2024-11-08 14:43:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:47,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:47,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:47,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:43:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:47,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:43:47,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:47,461 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:43:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312709601] [2024-11-08 14:43:47,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:43:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031132793] [2024-11-08 14:43:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031132793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:43:47,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:43:47,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:43:47,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807866897] [2024-11-08 14:43:47,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:47,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:43:47,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:43:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:43:47,464 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:47,508 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-08 14:43:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:43:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 14:43:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:47,510 INFO L225 Difference]: With dead ends: 28 [2024-11-08 14:43:47,510 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 14:43:47,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:43:47,511 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:47,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 14:43:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 14:43:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:43:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-08 14:43:47,517 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-08 14:43:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:47,517 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-08 14:43:47,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-08 14:43:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:43:47,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:47,518 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:47,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:43:47,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:47,723 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:47,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2024-11-08 14:43:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967946354] [2024-11-08 14:43:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:47,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:47,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:43:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:47,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:47,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967946354] [2024-11-08 14:43:47,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967946354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:43:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410130744] [2024-11-08 14:43:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:47,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:47,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:43:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:47,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 14:43:47,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:47,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:43:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410130744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:43:47,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:43:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-08 14:43:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235876224] [2024-11-08 14:43:47,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:43:47,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:43:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:43:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:43:47,942 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:43:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:48,025 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-08 14:43:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:43:48,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2024-11-08 14:43:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:48,027 INFO L225 Difference]: With dead ends: 58 [2024-11-08 14:43:48,027 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 14:43:48,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:43:48,028 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:48,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 14:43:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-08 14:43:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:43:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-08 14:43:48,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2024-11-08 14:43:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:48,040 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-08 14:43:48,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:43:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-08 14:43:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:43:48,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:48,042 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:48,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:43:48,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 14:43:48,243 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:48,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2024-11-08 14:43:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:48,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201389622] [2024-11-08 14:43:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:43:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831608297] [2024-11-08 14:43:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:48,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:48,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:48,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:48,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:43:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:48,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:43:48,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:48,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:43:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 14:43:48,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:48,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201389622] [2024-11-08 14:43:48,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:43:48,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831608297] [2024-11-08 14:43:48,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831608297] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:43:48,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:43:48,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-08 14:43:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293266836] [2024-11-08 14:43:48,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:48,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:43:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:43:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:43:48,490 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:43:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:48,533 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-08 14:43:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:43:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-08 14:43:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:48,534 INFO L225 Difference]: With dead ends: 60 [2024-11-08 14:43:48,536 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:43:48,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:43:48,537 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:48,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:43:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2024-11-08 14:43:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:43:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-08 14:43:48,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2024-11-08 14:43:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:48,559 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-08 14:43:48,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:43:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-08 14:43:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 14:43:48,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:48,560 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:48,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 14:43:48,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:48,761 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:48,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2024-11-08 14:43:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644588370] [2024-11-08 14:43:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:43:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627436809] [2024-11-08 14:43:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:48,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:48,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:43:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:48,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:43:48,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:43:49,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:43:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:43:49,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:49,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644588370] [2024-11-08 14:43:49,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:43:49,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627436809] [2024-11-08 14:43:49,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627436809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:43:49,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:43:49,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-08 14:43:49,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919043121] [2024-11-08 14:43:49,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:43:49,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:43:49,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:43:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:43:49,210 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:43:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:49,333 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-08 14:43:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:43:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-11-08 14:43:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:49,334 INFO L225 Difference]: With dead ends: 55 [2024-11-08 14:43:49,334 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 14:43:49,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:43:49,335 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:49,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 91 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:43:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 14:43:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-08 14:43:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:43:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-11-08 14:43:49,345 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2024-11-08 14:43:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:49,346 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-11-08 14:43:49,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:43:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-11-08 14:43:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 14:43:49,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:49,347 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:49,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:43:49,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:49,551 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:49,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2024-11-08 14:43:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:49,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645757824] [2024-11-08 14:43:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:43:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 14:43:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 14:43:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-08 14:43:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:43:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:43:49,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645757824] [2024-11-08 14:43:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645757824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:43:49,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085879007] [2024-11-08 14:43:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:49,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:49,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:49,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:49,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:43:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:49,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:43:49,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:43:49,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:43:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:43:49,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085879007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:43:49,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:43:49,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2024-11-08 14:43:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519470336] [2024-11-08 14:43:49,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:43:49,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:43:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:43:49,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:43:49,918 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-08 14:43:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:49,995 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2024-11-08 14:43:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:43:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2024-11-08 14:43:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:49,996 INFO L225 Difference]: With dead ends: 62 [2024-11-08 14:43:49,997 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:43:49,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-08 14:43:49,998 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:49,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:43:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-08 14:43:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:43:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-08 14:43:50,011 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2024-11-08 14:43:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:50,011 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-08 14:43:50,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-08 14:43:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-08 14:43:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 14:43:50,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:50,013 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:50,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 14:43:50,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:50,218 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:50,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 2 times [2024-11-08 14:43:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:50,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581542691] [2024-11-08 14:43:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:43:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088700125] [2024-11-08 14:43:50,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:43:50,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:50,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:50,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:43:50,329 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:43:50,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-08 14:43:50,331 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2024-11-08 14:43:50,331 INFO L325 BasicCegarLoop]: Counterexample might be feasible [2024-11-08 14:43:50,336 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-08 14:43:50,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 14:43:50,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:50,540 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:50,550 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-08 14:43:50,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.11 02:43:50 BoogieIcfgContainer [2024-11-08 14:43:50,552 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-08 14:43:50,552 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-08 14:43:50,552 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-08 14:43:50,552 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-08 14:43:50,553 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:43:46" (3/4) ... [2024-11-08 14:43:50,554 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-08 14:43:50,555 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-08 14:43:50,555 INFO L158 Benchmark]: Toolchain (without parser) took 4404.75ms. Allocated memory was 146.8MB in the beginning and 226.5MB in the end (delta: 79.7MB). Free memory was 75.4MB in the beginning and 172.2MB in the end (delta: -96.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 14:43:50,555 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 14:43:50,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.67ms. Allocated memory was 146.8MB in the beginning and 226.5MB in the end (delta: 79.7MB). Free memory was 75.2MB in the beginning and 197.8MB in the end (delta: -122.6MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2024-11-08 14:43:50,556 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.25ms. Allocated memory is still 226.5MB. Free memory was 197.8MB in the beginning and 195.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 14:43:50,556 INFO L158 Benchmark]: Boogie Preprocessor took 32.00ms. Allocated memory is still 226.5MB. Free memory was 195.7MB in the beginning and 194.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 14:43:50,556 INFO L158 Benchmark]: RCFGBuilder took 264.84ms. Allocated memory is still 226.5MB. Free memory was 194.7MB in the beginning and 183.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-08 14:43:50,556 INFO L158 Benchmark]: TraceAbstraction took 3822.33ms. Allocated memory is still 226.5MB. Free memory was 182.1MB in the beginning and 172.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2024-11-08 14:43:50,557 INFO L158 Benchmark]: Witness Printer took 2.72ms. Allocated memory is still 226.5MB. Free memory is still 172.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 14:43:50,557 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.67ms. Allocated memory was 146.8MB in the beginning and 226.5MB in the end (delta: 79.7MB). Free memory was 75.2MB in the beginning and 197.8MB in the end (delta: -122.6MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.25ms. Allocated memory is still 226.5MB. Free memory was 197.8MB in the beginning and 195.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.00ms. Allocated memory is still 226.5MB. Free memory was 195.7MB in the beginning and 194.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 264.84ms. Allocated memory is still 226.5MB. Free memory was 194.7MB in the beginning and 183.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3822.33ms. Allocated memory is still 226.5MB. Free memory was 182.1MB in the beginning and 172.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Witness Printer took 2.72ms. Allocated memory is still 226.5MB. Free memory is still 172.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 12]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) [L22] RET assume_abort_if_not(k <= 256) [L24] y = 0 [L25] x = 0 [L26] c = 0 [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L31] COND TRUE !(c < k) [L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L40] CALL __VERIFIER_assert(k*y == y*y) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 414 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 289 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 143 IncrementalHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 125 mSDtfsCounter, 143 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 265 GetRequests, 213 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=7, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 305 ConstructedInterpolants, 0 QuantifiedInterpolants, 968 SizeOfPredicates, 9 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 175/312 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-08 14:43:50,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:43:52,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:43:52,679 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-08 14:43:52,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:43:52,683 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:43:52,711 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:43:52,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:43:52,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:43:52,712 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:43:52,713 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:43:52,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:43:52,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:43:52,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:43:52,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:43:52,714 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:43:52,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:43:52,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:43:52,716 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:43:52,718 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:43:52,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:43:52,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:43:52,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:43:52,719 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:43:52,720 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 14:43:52,721 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-08 14:43:52,721 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:43:52,721 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-08 14:43:52,721 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:43:52,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:43:52,721 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:43:52,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:43:52,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:43:52,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:43:52,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:43:52,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:43:52,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:43:52,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:43:52,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:43:52,723 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-08 14:43:52,723 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-08 14:43:52,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:43:52,724 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:43:52,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:43:52,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:43:52,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 [2024-11-08 14:43:52,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:43:52,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:43:52,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:43:52,995 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:43:52,995 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:43:52,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2024-11-08 14:43:54,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:43:54,773 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:43:54,774 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2024-11-08 14:43:54,780 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8263e9649/970dc4efc7274515869dd554167a84c8/FLAG47b2d8760 [2024-11-08 14:43:55,184 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8263e9649/970dc4efc7274515869dd554167a84c8 [2024-11-08 14:43:55,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:43:55,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:43:55,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:43:55,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:43:55,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:43:55,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af7b378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55, skipping insertion in model container [2024-11-08 14:43:55,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,209 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:43:55,343 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2024-11-08 14:43:55,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:43:55,377 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:43:55,387 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2024-11-08 14:43:55,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:43:55,415 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:43:55,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55 WrapperNode [2024-11-08 14:43:55,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:43:55,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:43:55,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:43:55,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:43:55,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,445 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2024-11-08 14:43:55,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:43:55,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:43:55,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:43:55,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:43:55,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,473 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-08 14:43:55,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:43:55,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:43:55,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:43:55,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:43:55,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (1/1) ... [2024-11-08 14:43:55,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:43:55,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:55,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 14:43:55,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:43:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:43:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-08 14:43:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:43:55,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:43:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:43:55,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:43:55,647 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:43:55,649 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:43:56,035 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-08 14:43:56,038 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:43:56,049 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:43:56,050 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 14:43:56,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:43:56 BoogieIcfgContainer [2024-11-08 14:43:56,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:43:56,053 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:43:56,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:43:56,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:43:56,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:43:55" (1/3) ... [2024-11-08 14:43:56,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bc8d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:43:56, skipping insertion in model container [2024-11-08 14:43:56,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:43:55" (2/3) ... [2024-11-08 14:43:56,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bc8d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:43:56, skipping insertion in model container [2024-11-08 14:43:56,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:43:56" (3/3) ... [2024-11-08 14:43:56,060 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2024-11-08 14:43:56,076 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:43:56,076 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:43:56,134 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:43:56,141 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;@3ec55266, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:43:56,142 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:43:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:43:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 14:43:56,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:56,153 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:56,154 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:56,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2024-11-08 14:43:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:43:56,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769895462] [2024-11-08 14:43:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:56,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:56,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:43:56,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:43:56,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-08 14:43:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:56,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-08 14:43:56,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:56,351 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:43:56,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:43:56,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769895462] [2024-11-08 14:43:56,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769895462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:43:56,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:43:56,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:43:56,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319013467] [2024-11-08 14:43:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:56,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:43:56,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:43:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:43:56,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:43:56,374 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2024-11-08 14:43:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:56,387 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-11-08 14:43:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:43:56,388 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 [2024-11-08 14:43:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:56,393 INFO L225 Difference]: With dead ends: 37 [2024-11-08 14:43:56,393 INFO L226 Difference]: Without dead ends: 16 [2024-11-08 14:43:56,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:43:56,397 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:56,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-08 14:43:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-08 14:43:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:43:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-08 14:43:56,422 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2024-11-08 14:43:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:56,423 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-08 14:43:56,423 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) [2024-11-08 14:43:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-08 14:43:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:43:56,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:56,424 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:56,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-08 14:43:56,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:56,630 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:56,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2024-11-08 14:43:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:43:56,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046347927] [2024-11-08 14:43:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:43:56,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:43:56,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-08 14:43:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:56,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 14:43:56,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:56,920 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:43:56,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:43:56,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046347927] [2024-11-08 14:43:56,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046347927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:43:56,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:43:56,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:43:56,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324730700] [2024-11-08 14:43:56,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:56,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:43:56,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:43:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:43:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:43:56,923 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:56,946 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-08 14:43:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:43:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 14:43:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:56,947 INFO L225 Difference]: With dead ends: 26 [2024-11-08 14:43:56,948 INFO L226 Difference]: Without dead ends: 18 [2024-11-08 14:43:56,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:43:56,949 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:56,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:43:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-08 14:43:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-08 14:43:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:43:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-08 14:43:56,954 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-11-08 14:43:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:56,954 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-08 14:43:56,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-08 14:43:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:43:56,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:56,955 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:56,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:43:57,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:57,160 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:57,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2024-11-08 14:43:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:43:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424621354] [2024-11-08 14:43:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:57,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:57,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:43:57,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:43:57,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-08 14:43:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:57,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 14:43:57,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:57,513 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:43:57,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:43:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424621354] [2024-11-08 14:43:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424621354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:43:57,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:43:57,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:43:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520712186] [2024-11-08 14:43:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:43:57,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:43:57,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:43:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:43:57,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:43:57,515 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:58,690 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-08 14:43:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:43:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 14:43:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:58,698 INFO L225 Difference]: With dead ends: 28 [2024-11-08 14:43:58,698 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 14:43:58,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:43:58,700 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:58,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 14:43:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 14:43:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 14:43:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:43:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-08 14:43:58,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-08 14:43:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:58,710 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-08 14:43:58,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:43:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-08 14:43:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:43:58,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:58,711 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:58,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-08 14:43:58,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:58,911 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:58,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2024-11-08 14:43:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:43:58,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82504734] [2024-11-08 14:43:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:43:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:43:58,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:43:58,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-08 14:43:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:43:59,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 14:43:59,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:59,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:43:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:43:59,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:43:59,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82504734] [2024-11-08 14:43:59,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82504734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:43:59,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:43:59,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2024-11-08 14:43:59,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172129095] [2024-11-08 14:43:59,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:43:59,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:43:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:43:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:43:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:43:59,715 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:44:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:04,196 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-08 14:44:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:44:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-08 14:44:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:04,207 INFO L225 Difference]: With dead ends: 58 [2024-11-08 14:44:04,207 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 14:44:04,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-08 14:44:04,208 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:04,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 70 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-08 14:44:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 14:44:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-08 14:44:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:44:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-08 14:44:04,215 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2024-11-08 14:44:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:04,216 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-08 14:44:04,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:44:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-08 14:44:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:44:04,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:04,216 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:04,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-08 14:44:04,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:04,417 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:04,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:04,418 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2024-11-08 14:44:04,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:44:04,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137130867] [2024-11-08 14:44:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:04,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:44:04,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:44:04,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-08 14:44:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:44:04,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:04,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 14:44:18,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:44:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137130867] [2024-11-08 14:44:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137130867] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:44:18,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:44:18,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-08 14:44:18,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721869803] [2024-11-08 14:44:18,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:44:18,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:44:18,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:44:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:44:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:44:18,391 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:44:21,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 14:44:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:22,129 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-08 14:44:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:44:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-08 14:44:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:22,138 INFO L225 Difference]: With dead ends: 60 [2024-11-08 14:44:22,138 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:44:22,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:44:22,139 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:22,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-08 14:44:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:44:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2024-11-08 14:44:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:44:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-08 14:44:22,172 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2024-11-08 14:44:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:22,172 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-08 14:44:22,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:44:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-08 14:44:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 14:44:22,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:22,173 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:22,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-08 14:44:22,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:22,373 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:22,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2024-11-08 14:44:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:44:22,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051452848] [2024-11-08 14:44:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:22,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:44:22,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:44:22,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-08 14:44:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:22,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:44:22,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:44:23,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:44:34,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:44:34,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051452848] [2024-11-08 14:44:34,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051452848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:44:34,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:44:34,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2024-11-08 14:44:34,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228841442] [2024-11-08 14:44:34,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:44:34,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:44:34,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:44:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:44:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:44:34,781 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:45,918 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-08 14:44:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:44:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-11-08 14:44:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:45,920 INFO L225 Difference]: With dead ends: 55 [2024-11-08 14:44:45,920 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 14:44:45,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-08 14:44:45,921 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:45,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 156 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-08 14:44:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 14:44:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-08 14:44:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-11-08 14:44:45,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2024-11-08 14:44:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:45,930 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-11-08 14:44:45,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-11-08 14:44:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 14:44:45,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:45,932 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:45,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-08 14:44:46,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:46,136 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:46,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2024-11-08 14:44:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:44:46,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061003558] [2024-11-08 14:44:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:46,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:44:46,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:44:46,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-11-08 14:44:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:46,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:44:46,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:44:47,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:44:48,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:44:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061003558] [2024-11-08 14:44:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061003558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:44:48,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:44:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-11-08 14:44:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447376580] [2024-11-08 14:44:48,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:44:48,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:44:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:44:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:44:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:44:48,785 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-08 14:44:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:54,634 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2024-11-08 14:44:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:44:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2024-11-08 14:44:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:54,638 INFO L225 Difference]: With dead ends: 62 [2024-11-08 14:44:54,638 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:44:54,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-08 14:44:54,638 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:54,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 234 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-08 14:44:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:44:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-08 14:44:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-08 14:44:54,672 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2024-11-08 14:44:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:54,673 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-08 14:44:54,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-08 14:44:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-08 14:44:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 14:44:54,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:54,680 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:54,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-11-08 14:44:54,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:54,881 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:54,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 2 times [2024-11-08 14:44:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-08 14:44:54,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417246459] [2024-11-08 14:44:54,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:44:54,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 14:44:54,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-08 14:44:54,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 14:44:54,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-08 14:44:55,647 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:44:55,647 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:44:55,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 14:44:55,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 14:44:57,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:45:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 14:45:22,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-08 14:45:22,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417246459] [2024-11-08 14:45:22,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417246459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:45:22,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:45:22,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-08 14:45:22,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700319082] [2024-11-08 14:45:22,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:45:22,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 14:45:22,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-08 14:45:22,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 14:45:22,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-08 14:45:22,441 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)