./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 06:54:57,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 06:54:57,165 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 06:54:57,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 06:54:57,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 06:54:57,197 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 06:54:57,199 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 06:54:57,199 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 06:54:57,200 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 06:54:57,201 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 06:54:57,202 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 06:54:57,202 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 06:54:57,202 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 06:54:57,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 06:54:57,204 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 06:54:57,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 06:54:57,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 06:54:57,205 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 06:54:57,205 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 06:54:57,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 06:54:57,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 06:54:57,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 06:54:57,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 06:54:57,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 06:54:57,207 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 06:54:57,207 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 06:54:57,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 06:54:57,208 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 06:54:57,208 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 06:54:57,209 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 06:54:57,209 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 06:54:57,209 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 06:54:57,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:54:57,210 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 06:54:57,210 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 06:54:57,210 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 06:54:57,210 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 06:54:57,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 06:54:57,211 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 06:54:57,211 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 06:54:57,211 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 06:54:57,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 06:54:57,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2024-11-16 06:54:57,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 06:54:57,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 06:54:57,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 06:54:57,459 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 06:54:57,459 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 06:54:57,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-11-16 06:54:58,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 06:54:59,124 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 06:54:59,126 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-11-16 06:54:59,136 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14443040e/0df6bc5c10b94be78e832e30ce4ea0b6/FLAG731019bcc [2024-11-16 06:54:59,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14443040e/0df6bc5c10b94be78e832e30ce4ea0b6 [2024-11-16 06:54:59,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 06:54:59,157 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 06:54:59,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 06:54:59,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 06:54:59,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 06:54:59,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2681e339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59, skipping insertion in model container [2024-11-16 06:54:59,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,190 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 06:54:59,382 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/egcd3-ll.c[490,503] [2024-11-16 06:54:59,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:54:59,430 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 06:54:59,444 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/egcd3-ll.c[490,503] [2024-11-16 06:54:59,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:54:59,481 INFO L204 MainTranslator]: Completed translation [2024-11-16 06:54:59,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59 WrapperNode [2024-11-16 06:54:59,482 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 06:54:59,483 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 06:54:59,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 06:54:59,483 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 06:54:59,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,515 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2024-11-16 06:54:59,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 06:54:59,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 06:54:59,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 06:54:59,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 06:54:59,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,552 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]. [2024-11-16 06:54:59,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,560 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,562 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,562 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 06:54:59,565 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 06:54:59,565 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 06:54:59,565 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 06:54:59,566 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (1/1) ... [2024-11-16 06:54:59,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:54:59,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:54:59,595 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) [2024-11-16 06:54:59,611 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 [2024-11-16 06:54:59,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 06:54:59,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 06:54:59,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 06:54:59,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 06:54:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 06:54:59,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 06:54:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 06:54:59,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 06:54:59,732 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 06:54:59,734 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 06:54:59,875 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-16 06:54:59,875 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 06:54:59,894 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 06:54:59,894 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 06:54:59,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:54:59 BoogieIcfgContainer [2024-11-16 06:54:59,896 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 06:54:59,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 06:54:59,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 06:54:59,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 06:54:59,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 06:54:59" (1/3) ... [2024-11-16 06:54:59,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494cade0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:54:59, skipping insertion in model container [2024-11-16 06:54:59,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:54:59" (2/3) ... [2024-11-16 06:54:59,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494cade0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:54:59, skipping insertion in model container [2024-11-16 06:54:59,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:54:59" (3/3) ... [2024-11-16 06:54:59,903 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-11-16 06:54:59,917 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 06:54:59,917 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 06:54:59,969 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 06:54:59,978 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;@636359ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 06:54:59,978 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 06:54:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-16 06:54:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-16 06:54:59,992 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:54:59,993 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:54:59,993 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:54:59,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash 254642677, now seen corresponding path program 1 times [2024-11-16 06:55:00,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:00,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070639474] [2024-11-16 06:55:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 06:55:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 06:55:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 06:55:00,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070639474] [2024-11-16 06:55:00,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070639474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:00,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:00,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 06:55:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009365287] [2024-11-16 06:55:00,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:00,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 06:55:00,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 06:55:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:55:00,243 INFO L87 Difference]: Start difference. First operand has 36 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 06:55:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:00,265 INFO L93 Difference]: Finished difference Result 69 states and 105 transitions. [2024-11-16 06:55:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 06:55:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-16 06:55:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:00,274 INFO L225 Difference]: With dead ends: 69 [2024-11-16 06:55:00,274 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 06:55:00,278 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 [2024-11-16 06:55:00,281 INFO L432 NwaCegarLoop]: 43 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, 43 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 [2024-11-16 06:55:00,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:55:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 06:55:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-16 06:55:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 06:55:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-11-16 06:55:00,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2024-11-16 06:55:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:00,319 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-11-16 06:55:00,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 06:55:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-11-16 06:55:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 06:55:00,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:00,322 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:00,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 06:55:00,323 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:00,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1558200102, now seen corresponding path program 1 times [2024-11-16 06:55:00,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834713640] [2024-11-16 06:55:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:00,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 06:55:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 06:55:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:55:00,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:00,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834713640] [2024-11-16 06:55:00,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834713640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:00,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:00,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 06:55:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139104523] [2024-11-16 06:55:00,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:00,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 06:55:00,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 06:55:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:00,650 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 06:55:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:00,742 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2024-11-16 06:55:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 06:55:00,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-16 06:55:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:00,744 INFO L225 Difference]: With dead ends: 55 [2024-11-16 06:55:00,744 INFO L226 Difference]: Without dead ends: 47 [2024-11-16 06:55:00,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:00,745 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:00,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:55:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-16 06:55:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2024-11-16 06:55:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 06:55:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-16 06:55:00,760 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2024-11-16 06:55:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:00,761 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-16 06:55:00,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 06:55:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-16 06:55:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-16 06:55:00,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:00,762 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:00,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 06:55:00,763 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:00,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -165974853, now seen corresponding path program 1 times [2024-11-16 06:55:00,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965496432] [2024-11-16 06:55:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:00,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529006371] [2024-11-16 06:55:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:00,791 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) [2024-11-16 06:55:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 06:55:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:00,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 06:55:00,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 06:55:01,070 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 06:55:01,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965496432] [2024-11-16 06:55:01,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:01,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529006371] [2024-11-16 06:55:01,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529006371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:01,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:01,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 06:55:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118021943] [2024-11-16 06:55:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:01,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:55:01,079 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 06:55:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:01,135 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2024-11-16 06:55:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 06:55:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-16 06:55:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:01,137 INFO L225 Difference]: With dead ends: 54 [2024-11-16 06:55:01,137 INFO L226 Difference]: Without dead ends: 51 [2024-11-16 06:55:01,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:01,138 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:01,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:55:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-16 06:55:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-11-16 06:55:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-16 06:55:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-11-16 06:55:01,153 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 26 [2024-11-16 06:55:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:01,153 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-11-16 06:55:01,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 06:55:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-11-16 06:55:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 06:55:01,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:01,155 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:01,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 06:55:01,358 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 [2024-11-16 06:55:01,359 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:01,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:01,360 INFO L85 PathProgramCache]: Analyzing trace with hash -123748836, now seen corresponding path program 1 times [2024-11-16 06:55:01,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:01,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726798088] [2024-11-16 06:55:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:01,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:01,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 06:55:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:01,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 06:55:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:55:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726798088] [2024-11-16 06:55:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726798088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:55:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173651292] [2024-11-16 06:55:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:01,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:01,534 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) [2024-11-16 06:55:01,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 06:55:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:01,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 06:55:01,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:55:01,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:55:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173651292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:01,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:55:01,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-16 06:55:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635225191] [2024-11-16 06:55:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:01,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 06:55:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 06:55:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-16 06:55:01,746 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 06:55:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:01,948 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2024-11-16 06:55:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 06:55:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-16 06:55:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:01,950 INFO L225 Difference]: With dead ends: 115 [2024-11-16 06:55:01,951 INFO L226 Difference]: Without dead ends: 107 [2024-11-16 06:55:01,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-16 06:55:01,953 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 73 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:01,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 294 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:55:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-16 06:55:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2024-11-16 06:55:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 60 states have internal predecessors, (71), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 06:55:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2024-11-16 06:55:01,972 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 28 [2024-11-16 06:55:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:01,972 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2024-11-16 06:55:01,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 06:55:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2024-11-16 06:55:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-16 06:55:01,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:01,975 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:01,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 06:55:02,175 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 [2024-11-16 06:55:02,176 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:02,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2054204561, now seen corresponding path program 1 times [2024-11-16 06:55:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:02,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176647206] [2024-11-16 06:55:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:02,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:02,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347444298] [2024-11-16 06:55:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:02,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:02,197 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) [2024-11-16 06:55:02,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 06:55:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:02,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 06:55:02,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 06:55:02,355 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 06:55:02,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:02,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176647206] [2024-11-16 06:55:02,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:02,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347444298] [2024-11-16 06:55:02,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347444298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:02,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:02,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 06:55:02,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094725521] [2024-11-16 06:55:02,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:02,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:02,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:02,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:55:02,358 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 06:55:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:02,406 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2024-11-16 06:55:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 06:55:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-16 06:55:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:02,408 INFO L225 Difference]: With dead ends: 87 [2024-11-16 06:55:02,408 INFO L226 Difference]: Without dead ends: 84 [2024-11-16 06:55:02,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:02,409 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:02,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:55:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-16 06:55:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-16 06:55:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 06:55:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2024-11-16 06:55:02,422 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 31 [2024-11-16 06:55:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:02,423 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2024-11-16 06:55:02,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 06:55:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2024-11-16 06:55:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 06:55:02,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:02,424 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:02,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 06:55:02,628 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 [2024-11-16 06:55:02,629 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:02,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1655793849, now seen corresponding path program 1 times [2024-11-16 06:55:02,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297812170] [2024-11-16 06:55:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171688754] [2024-11-16 06:55:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:02,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:02,652 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) [2024-11-16 06:55:02,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 06:55:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:02,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 06:55:02,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:55:03,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 06:55:03,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297812170] [2024-11-16 06:55:03,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171688754] [2024-11-16 06:55:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171688754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:03,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:03,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-11-16 06:55:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976569304] [2024-11-16 06:55:03,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:03,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 06:55:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 06:55:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-16 06:55:03,469 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 15 states have internal predecessors, (44), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 06:55:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:04,687 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2024-11-16 06:55:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 06:55:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 15 states have internal predecessors, (44), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-16 06:55:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:04,689 INFO L225 Difference]: With dead ends: 153 [2024-11-16 06:55:04,689 INFO L226 Difference]: Without dead ends: 150 [2024-11-16 06:55:04,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-11-16 06:55:04,690 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 111 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:04,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 332 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 06:55:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-16 06:55:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 126. [2024-11-16 06:55:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 98 states have internal predecessors, (116), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-16 06:55:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2024-11-16 06:55:04,725 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 33 [2024-11-16 06:55:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:04,725 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2024-11-16 06:55:04,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 15 states have internal predecessors, (44), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 06:55:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2024-11-16 06:55:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 06:55:04,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:04,726 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:04,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 06:55:04,927 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 [2024-11-16 06:55:04,927 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:04,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1346215163, now seen corresponding path program 1 times [2024-11-16 06:55:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106473144] [2024-11-16 06:55:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:04,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:04,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018251463] [2024-11-16 06:55:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:04,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:04,944 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) [2024-11-16 06:55:04,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 06:55:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:05,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 06:55:05,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 06:55:05,063 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 06:55:05,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:05,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106473144] [2024-11-16 06:55:05,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:05,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018251463] [2024-11-16 06:55:05,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018251463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:05,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:05,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 06:55:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029095898] [2024-11-16 06:55:05,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:05,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:05,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:55:05,066 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 06:55:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:05,153 INFO L93 Difference]: Finished difference Result 180 states and 241 transitions. [2024-11-16 06:55:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 06:55:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-16 06:55:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:05,157 INFO L225 Difference]: With dead ends: 180 [2024-11-16 06:55:05,157 INFO L226 Difference]: Without dead ends: 177 [2024-11-16 06:55:05,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:05,158 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:05,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 120 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:55:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-16 06:55:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2024-11-16 06:55:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 122 states have internal predecessors, (147), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-16 06:55:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 232 transitions. [2024-11-16 06:55:05,214 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 232 transitions. Word has length 36 [2024-11-16 06:55:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:05,214 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 232 transitions. [2024-11-16 06:55:05,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 06:55:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 232 transitions. [2024-11-16 06:55:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-16 06:55:05,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:05,216 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:05,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 06:55:05,416 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 [2024-11-16 06:55:05,416 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:05,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1343412687, now seen corresponding path program 1 times [2024-11-16 06:55:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:05,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409300878] [2024-11-16 06:55:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281719814] [2024-11-16 06:55:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:05,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:05,435 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) [2024-11-16 06:55:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 06:55:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:05,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-16 06:55:05,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:55:05,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 06:55:06,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:06,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409300878] [2024-11-16 06:55:06,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:06,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281719814] [2024-11-16 06:55:06,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281719814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:06,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2024-11-16 06:55:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517334596] [2024-11-16 06:55:06,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:06,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 06:55:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 06:55:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-16 06:55:06,122 INFO L87 Difference]: Start difference. First operand 171 states and 232 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-16 06:55:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:07,766 INFO L93 Difference]: Finished difference Result 337 states and 471 transitions. [2024-11-16 06:55:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 06:55:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2024-11-16 06:55:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:07,770 INFO L225 Difference]: With dead ends: 337 [2024-11-16 06:55:07,770 INFO L226 Difference]: Without dead ends: 334 [2024-11-16 06:55:07,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 06:55:07,772 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 226 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:07,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 299 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 06:55:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-11-16 06:55:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 257. [2024-11-16 06:55:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 189 states have (on average 1.216931216931217) internal successors, (230), 190 states have internal predecessors, (230), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-16 06:55:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2024-11-16 06:55:07,845 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 38 [2024-11-16 06:55:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:07,847 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2024-11-16 06:55:07,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-16 06:55:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2024-11-16 06:55:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 06:55:07,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:07,849 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:07,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 06:55:08,052 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 [2024-11-16 06:55:08,053 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:08,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:08,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2138409647, now seen corresponding path program 1 times [2024-11-16 06:55:08,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:08,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077186995] [2024-11-16 06:55:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:08,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756517137] [2024-11-16 06:55:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:08,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:08,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:08,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 06:55:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:08,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 06:55:08,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 06:55:08,164 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 06:55:08,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077186995] [2024-11-16 06:55:08,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756517137] [2024-11-16 06:55:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756517137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:08,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:08,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 06:55:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684408212] [2024-11-16 06:55:08,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:08,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:08,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:55:08,167 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 06:55:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:08,282 INFO L93 Difference]: Finished difference Result 369 states and 528 transitions. [2024-11-16 06:55:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 06:55:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-11-16 06:55:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:08,285 INFO L225 Difference]: With dead ends: 369 [2024-11-16 06:55:08,285 INFO L226 Difference]: Without dead ends: 366 [2024-11-16 06:55:08,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:08,287 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:08,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:55:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-11-16 06:55:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 345. [2024-11-16 06:55:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 220 states have (on average 1.1863636363636363) internal successors, (261), 235 states have internal predecessors, (261), 115 states have call successors, (115), 9 states have call predecessors, (115), 9 states have return successors, (114), 100 states have call predecessors, (114), 114 states have call successors, (114) [2024-11-16 06:55:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 490 transitions. [2024-11-16 06:55:08,408 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 490 transitions. Word has length 41 [2024-11-16 06:55:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:08,408 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 490 transitions. [2024-11-16 06:55:08,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 06:55:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 490 transitions. [2024-11-16 06:55:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 06:55:08,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:08,410 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:08,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 06:55:08,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:08,611 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:08,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -107234695, now seen corresponding path program 2 times [2024-11-16 06:55:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:08,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882559609] [2024-11-16 06:55:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:08,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 06:55:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:08,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 06:55:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-16 06:55:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:08,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882559609] [2024-11-16 06:55:08,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882559609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:08,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:08,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 06:55:08,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566357274] [2024-11-16 06:55:08,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:08,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:08,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:55:08,703 INFO L87 Difference]: Start difference. First operand 345 states and 490 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 06:55:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:08,803 INFO L93 Difference]: Finished difference Result 446 states and 628 transitions. [2024-11-16 06:55:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 06:55:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-16 06:55:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:08,807 INFO L225 Difference]: With dead ends: 446 [2024-11-16 06:55:08,807 INFO L226 Difference]: Without dead ends: 202 [2024-11-16 06:55:08,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-16 06:55:08,810 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 23 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:08,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:55:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-16 06:55:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2024-11-16 06:55:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 124 states have internal predecessors, (131), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-16 06:55:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 264 transitions. [2024-11-16 06:55:08,876 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 264 transitions. Word has length 47 [2024-11-16 06:55:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:08,876 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 264 transitions. [2024-11-16 06:55:08,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 06:55:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 264 transitions. [2024-11-16 06:55:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-16 06:55:08,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:08,877 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:08,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 06:55:08,878 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:08,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2029609015, now seen corresponding path program 1 times [2024-11-16 06:55:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:08,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066511858] [2024-11-16 06:55:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:08,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:08,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956723347] [2024-11-16 06:55:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:08,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:08,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:08,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 06:55:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:08,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-16 06:55:08,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-16 06:55:09,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 06:55:10,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:10,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066511858] [2024-11-16 06:55:10,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:10,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956723347] [2024-11-16 06:55:10,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956723347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:10,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:10,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-16 06:55:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015281442] [2024-11-16 06:55:10,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:10,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 06:55:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 06:55:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-16 06:55:10,496 INFO L87 Difference]: Start difference. First operand 192 states and 264 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-16 06:55:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:14,020 INFO L93 Difference]: Finished difference Result 523 states and 741 transitions. [2024-11-16 06:55:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-16 06:55:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 55 [2024-11-16 06:55:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:14,024 INFO L225 Difference]: With dead ends: 523 [2024-11-16 06:55:14,025 INFO L226 Difference]: Without dead ends: 402 [2024-11-16 06:55:14,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-16 06:55:14,027 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 212 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:14,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 538 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-16 06:55:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-16 06:55:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 302. [2024-11-16 06:55:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 198 states have (on average 1.1565656565656566) internal successors, (229), 205 states have internal predecessors, (229), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2024-11-16 06:55:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 410 transitions. [2024-11-16 06:55:14,152 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 410 transitions. Word has length 55 [2024-11-16 06:55:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:14,152 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 410 transitions. [2024-11-16 06:55:14,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-16 06:55:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 410 transitions. [2024-11-16 06:55:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-16 06:55:14,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:14,155 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:14,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 06:55:14,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-16 06:55:14,360 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:14,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 878561253, now seen corresponding path program 1 times [2024-11-16 06:55:14,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:14,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987648531] [2024-11-16 06:55:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:14,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554089013] [2024-11-16 06:55:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:14,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:14,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:14,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 06:55:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:14,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 06:55:14,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-16 06:55:14,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-16 06:55:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987648531] [2024-11-16 06:55:14,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554089013] [2024-11-16 06:55:14,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554089013] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 06:55:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 06:55:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-16 06:55:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187055035] [2024-11-16 06:55:14,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:14,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 06:55:14,564 INFO L87 Difference]: Start difference. First operand 302 states and 410 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 06:55:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:14,698 INFO L93 Difference]: Finished difference Result 309 states and 416 transitions. [2024-11-16 06:55:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 06:55:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2024-11-16 06:55:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:14,700 INFO L225 Difference]: With dead ends: 309 [2024-11-16 06:55:14,701 INFO L226 Difference]: Without dead ends: 306 [2024-11-16 06:55:14,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-16 06:55:14,701 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:14,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:55:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-16 06:55:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2024-11-16 06:55:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 201 states have (on average 1.154228855721393) internal successors, (232), 208 states have internal predecessors, (232), 91 states have call successors, (91), 13 states have call predecessors, (91), 13 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2024-11-16 06:55:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 413 transitions. [2024-11-16 06:55:14,804 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 413 transitions. Word has length 64 [2024-11-16 06:55:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:14,804 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 413 transitions. [2024-11-16 06:55:14,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 06:55:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 413 transitions. [2024-11-16 06:55:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-16 06:55:14,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:14,805 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:14,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 06:55:15,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:15,010 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:15,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1736793084, now seen corresponding path program 1 times [2024-11-16 06:55:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738713224] [2024-11-16 06:55:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:15,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604105547] [2024-11-16 06:55:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:15,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:15,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 06:55:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:15,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-16 06:55:15,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-16 06:55:15,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 06:55:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738713224] [2024-11-16 06:55:16,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604105547] [2024-11-16 06:55:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604105547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:16,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:16,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-11-16 06:55:16,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722168527] [2024-11-16 06:55:16,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:16,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 06:55:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:16,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 06:55:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-16 06:55:16,145 INFO L87 Difference]: Start difference. First operand 306 states and 413 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 22 states have internal predecessors, (77), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-16 06:55:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:20,347 INFO L93 Difference]: Finished difference Result 423 states and 578 transitions. [2024-11-16 06:55:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 06:55:20,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 22 states have internal predecessors, (77), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 67 [2024-11-16 06:55:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:20,350 INFO L225 Difference]: With dead ends: 423 [2024-11-16 06:55:20,350 INFO L226 Difference]: Without dead ends: 420 [2024-11-16 06:55:20,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2024-11-16 06:55:20,352 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 200 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:20,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 762 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-16 06:55:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2024-11-16 06:55:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 355. [2024-11-16 06:55:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 232 states have (on average 1.1508620689655173) internal successors, (267), 241 states have internal predecessors, (267), 107 states have call successors, (107), 15 states have call predecessors, (107), 15 states have return successors, (106), 98 states have call predecessors, (106), 106 states have call successors, (106) [2024-11-16 06:55:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 480 transitions. [2024-11-16 06:55:20,492 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 480 transitions. Word has length 67 [2024-11-16 06:55:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:20,493 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 480 transitions. [2024-11-16 06:55:20,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 22 states have internal predecessors, (77), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-16 06:55:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 480 transitions. [2024-11-16 06:55:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-16 06:55:20,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:20,494 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:20,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-16 06:55:20,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 06:55:20,699 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:20,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash 622804696, now seen corresponding path program 2 times [2024-11-16 06:55:20,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:20,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643473596] [2024-11-16 06:55:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:20,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 06:55:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 06:55:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-16 06:55:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-16 06:55:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-16 06:55:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-16 06:55:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-16 06:55:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-16 06:55:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-16 06:55:20,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:20,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643473596] [2024-11-16 06:55:20,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643473596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:55:20,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:55:20,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 06:55:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359954600] [2024-11-16 06:55:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:55:20,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 06:55:20,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 06:55:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:55:20,799 INFO L87 Difference]: Start difference. First operand 355 states and 480 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-16 06:55:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:21,027 INFO L93 Difference]: Finished difference Result 624 states and 851 transitions. [2024-11-16 06:55:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 06:55:21,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2024-11-16 06:55:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:21,030 INFO L225 Difference]: With dead ends: 624 [2024-11-16 06:55:21,030 INFO L226 Difference]: Without dead ends: 387 [2024-11-16 06:55:21,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 06:55:21,032 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:21,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 120 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:55:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-16 06:55:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 375. [2024-11-16 06:55:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 252 states have (on average 1.1547619047619047) internal successors, (291), 253 states have internal predecessors, (291), 107 states have call successors, (107), 15 states have call predecessors, (107), 15 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2024-11-16 06:55:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 504 transitions. [2024-11-16 06:55:21,178 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 504 transitions. Word has length 70 [2024-11-16 06:55:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:21,178 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 504 transitions. [2024-11-16 06:55:21,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-16 06:55:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 504 transitions. [2024-11-16 06:55:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-16 06:55:21,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:21,179 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:21,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-16 06:55:21,180 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:21,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash -756169522, now seen corresponding path program 3 times [2024-11-16 06:55:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:21,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795509085] [2024-11-16 06:55:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:21,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125819360] [2024-11-16 06:55:21,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 06:55:21,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:21,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:21,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:21,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 06:55:21,268 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 06:55:21,268 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:55:21,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-16 06:55:21,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-16 06:55:22,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 06:55:25,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:25,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795509085] [2024-11-16 06:55:25,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125819360] [2024-11-16 06:55:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125819360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:25,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:25,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2024-11-16 06:55:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613880848] [2024-11-16 06:55:25,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:25,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 06:55:25,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 06:55:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2024-11-16 06:55:25,180 INFO L87 Difference]: Start difference. First operand 375 states and 504 transitions. Second operand has 32 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 28 states have internal predecessors, (82), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-16 06:55:32,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-16 06:55:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:33,259 INFO L93 Difference]: Finished difference Result 473 states and 627 transitions. [2024-11-16 06:55:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-16 06:55:33,260 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 28 states have internal predecessors, (82), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 72 [2024-11-16 06:55:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:33,262 INFO L225 Difference]: With dead ends: 473 [2024-11-16 06:55:33,262 INFO L226 Difference]: Without dead ends: 470 [2024-11-16 06:55:33,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=691, Invalid=2731, Unknown=0, NotChecked=0, Total=3422 [2024-11-16 06:55:33,264 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 269 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 262 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:33,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 710 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 738 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-11-16 06:55:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-16 06:55:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 452. [2024-11-16 06:55:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 304 states have (on average 1.1480263157894737) internal successors, (349), 307 states have internal predecessors, (349), 127 states have call successors, (127), 20 states have call predecessors, (127), 20 states have return successors, (126), 124 states have call predecessors, (126), 126 states have call successors, (126) [2024-11-16 06:55:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 602 transitions. [2024-11-16 06:55:33,461 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 602 transitions. Word has length 72 [2024-11-16 06:55:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:33,462 INFO L471 AbstractCegarLoop]: Abstraction has 452 states and 602 transitions. [2024-11-16 06:55:33,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 28 states have internal predecessors, (82), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-16 06:55:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 602 transitions. [2024-11-16 06:55:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-16 06:55:33,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:33,463 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:33,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 06:55:33,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 06:55:33,664 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:33,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1743766732, now seen corresponding path program 1 times [2024-11-16 06:55:33,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:33,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133275501] [2024-11-16 06:55:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:33,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942381465] [2024-11-16 06:55:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:33,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:33,683 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:33,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 06:55:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:33,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 06:55:33,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-16 06:55:34,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-16 06:55:34,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:34,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133275501] [2024-11-16 06:55:34,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:34,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942381465] [2024-11-16 06:55:34,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942381465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:34,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:34,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-16 06:55:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135386838] [2024-11-16 06:55:34,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:34,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 06:55:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 06:55:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-16 06:55:34,585 INFO L87 Difference]: Start difference. First operand 452 states and 602 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-16 06:55:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:36,334 INFO L93 Difference]: Finished difference Result 1067 states and 1571 transitions. [2024-11-16 06:55:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 06:55:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 86 [2024-11-16 06:55:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:36,340 INFO L225 Difference]: With dead ends: 1067 [2024-11-16 06:55:36,341 INFO L226 Difference]: Without dead ends: 1064 [2024-11-16 06:55:36,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-11-16 06:55:36,342 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 156 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:36,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 481 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 06:55:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2024-11-16 06:55:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1003. [2024-11-16 06:55:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 575 states have (on average 1.2208695652173913) internal successors, (702), 578 states have internal predecessors, (702), 403 states have call successors, (403), 24 states have call predecessors, (403), 24 states have return successors, (402), 400 states have call predecessors, (402), 402 states have call successors, (402) [2024-11-16 06:55:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1507 transitions. [2024-11-16 06:55:36,908 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1507 transitions. Word has length 86 [2024-11-16 06:55:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:36,908 INFO L471 AbstractCegarLoop]: Abstraction has 1003 states and 1507 transitions. [2024-11-16 06:55:36,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-16 06:55:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1507 transitions. [2024-11-16 06:55:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-16 06:55:36,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:36,910 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:36,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 06:55:37,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-16 06:55:37,115 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:37,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash 483778539, now seen corresponding path program 1 times [2024-11-16 06:55:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255033046] [2024-11-16 06:55:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:37,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781527838] [2024-11-16 06:55:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:37,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:37,145 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:37,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 06:55:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:55:37,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-16 06:55:37,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-16 06:55:38,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-16 06:55:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255033046] [2024-11-16 06:55:41,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781527838] [2024-11-16 06:55:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781527838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:41,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:41,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-11-16 06:55:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520776572] [2024-11-16 06:55:41,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:41,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 06:55:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 06:55:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 06:55:41,037 INFO L87 Difference]: Start difference. First operand 1003 states and 1507 transitions. Second operand has 33 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-16 06:55:44,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-16 06:55:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:55:52,431 INFO L93 Difference]: Finished difference Result 1278 states and 1895 transitions. [2024-11-16 06:55:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-16 06:55:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 85 [2024-11-16 06:55:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:55:52,439 INFO L225 Difference]: With dead ends: 1278 [2024-11-16 06:55:52,440 INFO L226 Difference]: Without dead ends: 1269 [2024-11-16 06:55:52,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1200, Invalid=4962, Unknown=0, NotChecked=0, Total=6162 [2024-11-16 06:55:52,442 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 349 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-16 06:55:52,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1059 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-16 06:55:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2024-11-16 06:55:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1220. [2024-11-16 06:55:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 721 states have (on average 1.2122052704576975) internal successors, (874), 725 states have internal predecessors, (874), 469 states have call successors, (469), 29 states have call predecessors, (469), 29 states have return successors, (468), 465 states have call predecessors, (468), 468 states have call successors, (468) [2024-11-16 06:55:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1811 transitions. [2024-11-16 06:55:53,546 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1811 transitions. Word has length 85 [2024-11-16 06:55:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:55:53,546 INFO L471 AbstractCegarLoop]: Abstraction has 1220 states and 1811 transitions. [2024-11-16 06:55:53,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-16 06:55:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1811 transitions. [2024-11-16 06:55:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-16 06:55:53,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:55:53,549 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:55:53,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-16 06:55:53,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-16 06:55:53,750 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:55:53,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:55:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash -945692287, now seen corresponding path program 4 times [2024-11-16 06:55:53,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:55:53,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76252677] [2024-11-16 06:55:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:55:53,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:55:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:55:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310890314] [2024-11-16 06:55:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 06:55:53,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:55:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:55:53,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:55:53,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 06:55:53,838 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 06:55:53,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:55:53,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-16 06:55:53,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:55:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 30 proven. 61 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-16 06:55:56,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:55:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-16 06:55:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:55:56,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76252677] [2024-11-16 06:55:56,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:55:56,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310890314] [2024-11-16 06:55:56,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310890314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:55:56,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:55:56,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-11-16 06:55:56,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633105099] [2024-11-16 06:55:56,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:55:56,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 06:55:56,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:55:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 06:55:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-11-16 06:55:56,590 INFO L87 Difference]: Start difference. First operand 1220 states and 1811 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 18 states have internal predecessors, (81), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-16 06:56:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:56:09,497 INFO L93 Difference]: Finished difference Result 1518 states and 2255 transitions. [2024-11-16 06:56:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-16 06:56:09,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 18 states have internal predecessors, (81), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 94 [2024-11-16 06:56:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:56:09,507 INFO L225 Difference]: With dead ends: 1518 [2024-11-16 06:56:09,507 INFO L226 Difference]: Without dead ends: 1515 [2024-11-16 06:56:09,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 06:56:09,509 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 110 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:56:09,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 767 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-16 06:56:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2024-11-16 06:56:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1240. [2024-11-16 06:56:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 736 states have (on average 1.2078804347826086) internal successors, (889), 740 states have internal predecessors, (889), 469 states have call successors, (469), 34 states have call predecessors, (469), 34 states have return successors, (468), 465 states have call predecessors, (468), 468 states have call successors, (468) [2024-11-16 06:56:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1826 transitions. [2024-11-16 06:56:10,573 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1826 transitions. Word has length 94 [2024-11-16 06:56:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:56:10,574 INFO L471 AbstractCegarLoop]: Abstraction has 1240 states and 1826 transitions. [2024-11-16 06:56:10,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 18 states have internal predecessors, (81), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-16 06:56:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1826 transitions. [2024-11-16 06:56:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-16 06:56:10,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:56:10,576 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:56:10,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 06:56:10,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:56:10,777 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:56:10,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:56:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1816224918, now seen corresponding path program 2 times [2024-11-16 06:56:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:56:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958620975] [2024-11-16 06:56:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:56:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:56:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:10,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 06:56:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:10,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 06:56:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:10,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-16 06:56:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:10,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-16 06:56:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:10,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-16 06:56:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:11,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-16 06:56:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:11,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-11-16 06:56:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:11,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-16 06:56:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:11,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-16 06:56:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:11,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-11-16 06:56:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-16 06:56:11,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:56:11,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958620975] [2024-11-16 06:56:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958620975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:56:11,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897827624] [2024-11-16 06:56:11,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:56:11,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:56:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:56:11,022 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:56:11,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 06:56:11,088 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:56:11,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:56:11,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 06:56:11,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:56:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-16 06:56:11,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:56:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-16 06:56:11,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897827624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:56:11,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:56:11,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-11-16 06:56:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282808946] [2024-11-16 06:56:11,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:56:11,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 06:56:11,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:56:11,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 06:56:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-16 06:56:11,235 INFO L87 Difference]: Start difference. First operand 1240 states and 1826 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-16 06:56:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:56:12,670 INFO L93 Difference]: Finished difference Result 1411 states and 2082 transitions. [2024-11-16 06:56:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 06:56:12,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2024-11-16 06:56:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:56:12,678 INFO L225 Difference]: With dead ends: 1411 [2024-11-16 06:56:12,678 INFO L226 Difference]: Without dead ends: 1403 [2024-11-16 06:56:12,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 209 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-11-16 06:56:12,679 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 86 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 06:56:12,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 490 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 06:56:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2024-11-16 06:56:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1074. [2024-11-16 06:56:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 633 states have (on average 1.2085308056872037) internal successors, (765), 636 states have internal predecessors, (765), 407 states have call successors, (407), 33 states have call predecessors, (407), 33 states have return successors, (406), 404 states have call predecessors, (406), 406 states have call successors, (406) [2024-11-16 06:56:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1578 transitions. [2024-11-16 06:56:13,568 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1578 transitions. Word has length 96 [2024-11-16 06:56:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:56:13,568 INFO L471 AbstractCegarLoop]: Abstraction has 1074 states and 1578 transitions. [2024-11-16 06:56:13,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-16 06:56:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1578 transitions. [2024-11-16 06:56:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-16 06:56:13,570 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:56:13,570 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:56:13,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-16 06:56:13,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:56:13,771 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:56:13,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:56:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash -758129466, now seen corresponding path program 2 times [2024-11-16 06:56:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:56:13,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46909759] [2024-11-16 06:56:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:56:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:56:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:56:13,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780394014] [2024-11-16 06:56:13,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:56:13,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:56:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:56:13,794 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:56:13,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 06:56:13,905 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:56:13,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:56:13,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-16 06:56:13,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:56:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-16 06:56:14,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:56:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-16 06:56:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:56:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46909759] [2024-11-16 06:56:16,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:56:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780394014] [2024-11-16 06:56:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780394014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:56:16,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:56:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-16 06:56:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200411092] [2024-11-16 06:56:16,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:56:16,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 06:56:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:56:16,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 06:56:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-16 06:56:16,441 INFO L87 Difference]: Start difference. First operand 1074 states and 1578 transitions. Second operand has 22 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-16 06:56:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:56:21,609 INFO L93 Difference]: Finished difference Result 1505 states and 2204 transitions. [2024-11-16 06:56:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-16 06:56:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 105 [2024-11-16 06:56:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:56:21,616 INFO L225 Difference]: With dead ends: 1505 [2024-11-16 06:56:21,616 INFO L226 Difference]: Without dead ends: 1496 [2024-11-16 06:56:21,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2024-11-16 06:56:21,618 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 294 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:56:21,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 845 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-16 06:56:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2024-11-16 06:56:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1288. [2024-11-16 06:56:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 760 states have (on average 1.2078947368421054) internal successors, (918), 763 states have internal predecessors, (918), 487 states have call successors, (487), 40 states have call predecessors, (487), 40 states have return successors, (486), 484 states have call predecessors, (486), 486 states have call successors, (486) [2024-11-16 06:56:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1891 transitions. [2024-11-16 06:56:22,695 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1891 transitions. Word has length 105 [2024-11-16 06:56:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:56:22,696 INFO L471 AbstractCegarLoop]: Abstraction has 1288 states and 1891 transitions. [2024-11-16 06:56:22,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-16 06:56:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1891 transitions. [2024-11-16 06:56:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-16 06:56:22,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:56:22,698 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:56:22,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-16 06:56:22,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:56:22,899 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:56:22,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:56:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1091613371, now seen corresponding path program 1 times [2024-11-16 06:56:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:56:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132187354] [2024-11-16 06:56:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:56:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:56:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 06:56:22,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843816169] [2024-11-16 06:56:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:56:22,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:56:22,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:56:22,931 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:56:22,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 06:56:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:56:23,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-16 06:56:23,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:56:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 52 proven. 87 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2024-11-16 06:56:24,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:56:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 65 proven. 71 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-11-16 06:56:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:56:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132187354] [2024-11-16 06:56:28,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 06:56:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843816169] [2024-11-16 06:56:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843816169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:56:28,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 06:56:28,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2024-11-16 06:56:28,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533524633] [2024-11-16 06:56:28,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 06:56:28,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-16 06:56:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:56:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-16 06:56:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 06:56:28,905 INFO L87 Difference]: Start difference. First operand 1288 states and 1891 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 34 states have internal predecessors, (102), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30)