./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.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-scaling/egcd3-ll_valuebound20.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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:05:39,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:05:39,832 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:05:39,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:05:39,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:05:39,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:05:39,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:05:39,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:05:39,863 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:05:39,864 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:05:39,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:05:39,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:05:39,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:05:39,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:05:39,874 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:05:39,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:05:39,875 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:05:39,875 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:05:39,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:05:39,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:05:39,875 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:05:39,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:05:39,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:05:39,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:05:39,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:05:39,879 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:05:39,879 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:05:39,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:05:39,880 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:05:39,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:05:39,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:05:39,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:05:39,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:05:39,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:05:39,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:05:39,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:05:39,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:05:39,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:05:39,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:05:39,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:05:39,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:05:39,884 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:05:39,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 [2024-11-16 07:05:40,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:05:40,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:05:40,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:05:40,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:05:40,092 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:05:40,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-11-16 07:05:41,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:05:41,407 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:05:41,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-11-16 07:05:41,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd39e46a/997acf4ae866423da65706763dade61e/FLAG4115bd8fa [2024-11-16 07:05:41,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd39e46a/997acf4ae866423da65706763dade61e [2024-11-16 07:05:41,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:05:41,824 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:05:41,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:05:41,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:05:41,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:05:41,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:05:41" (1/1) ... [2024-11-16 07:05:41,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680f4422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:41, skipping insertion in model container [2024-11-16 07:05:41,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:05:41" (1/1) ... [2024-11-16 07:05:41,844 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:05:41,973 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2024-11-16 07:05:41,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:05:42,005 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:05:42,019 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2024-11-16 07:05:42,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:05:42,038 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:05:42,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42 WrapperNode [2024-11-16 07:05:42,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:05:42,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:05:42,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:05:42,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:05:42,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,059 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-16 07:05:42,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:05:42,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:05:42,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:05:42,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:05:42,067 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,075 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 07:05:42,075 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,077 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,082 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:05:42,083 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:05:42,083 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:05:42,084 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:05:42,084 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (1/1) ... [2024-11-16 07:05:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:05:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:42,124 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 07:05:42,126 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 07:05:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:05:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 07:05:42,160 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 07:05:42,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:05:42,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:05:42,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:05:42,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 07:05:42,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 07:05:42,212 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:05:42,213 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:05:42,336 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-16 07:05:42,337 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:05:42,349 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:05:42,349 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:05:42,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:05:42 BoogieIcfgContainer [2024-11-16 07:05:42,350 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:05:42,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:05:42,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:05:42,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:05:42,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:05:41" (1/3) ... [2024-11-16 07:05:42,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d971a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:05:42, skipping insertion in model container [2024-11-16 07:05:42,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:42" (2/3) ... [2024-11-16 07:05:42,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d971a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:05:42, skipping insertion in model container [2024-11-16 07:05:42,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:05:42" (3/3) ... [2024-11-16 07:05:42,355 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2024-11-16 07:05:42,368 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:05:42,368 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:05:42,408 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:05:42,414 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;@66cdb566, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:05:42,418 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:05:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-16 07:05:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-16 07:05:42,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:42,426 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:05:42,426 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:42,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1204067688, now seen corresponding path program 1 times [2024-11-16 07:05:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595658847] [2024-11-16 07:05:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:05:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 07:05:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 07:05:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 07:05:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:42,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595658847] [2024-11-16 07:05:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595658847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:42,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:42,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 07:05:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309377579] [2024-11-16 07:05:42,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:42,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 07:05:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 07:05:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:05:42,602 INFO L87 Difference]: Start difference. First operand has 39 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 07:05:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:42,617 INFO L93 Difference]: Finished difference Result 75 states and 117 transitions. [2024-11-16 07:05:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 07:05:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-16 07:05:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:42,622 INFO L225 Difference]: With dead ends: 75 [2024-11-16 07:05:42,622 INFO L226 Difference]: Without dead ends: 35 [2024-11-16 07:05:42,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 07:05:42,627 INFO L432 NwaCegarLoop]: 48 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, 48 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 07:05:42,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-16 07:05:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-16 07:05:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 07:05:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-16 07:05:42,652 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 30 [2024-11-16 07:05:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:42,652 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-16 07:05:42,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 07:05:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-16 07:05:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 07:05:42,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:42,654 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:05:42,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:05:42,654 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:42,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash -440055221, now seen corresponding path program 1 times [2024-11-16 07:05:42,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:42,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218344857] [2024-11-16 07:05:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:05:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 07:05:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 07:05:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,893 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 07:05:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:05:42,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:42,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218344857] [2024-11-16 07:05:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218344857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:42,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:42,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 07:05:42,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215271449] [2024-11-16 07:05:42,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:42,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 07:05:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 07:05:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:05:42,938 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:43,009 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-16 07:05:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 07:05:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-11-16 07:05:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:43,011 INFO L225 Difference]: With dead ends: 58 [2024-11-16 07:05:43,011 INFO L226 Difference]: Without dead ends: 50 [2024-11-16 07:05:43,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 07:05:43,013 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:43,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 136 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:05:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-16 07:05:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2024-11-16 07:05:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 07:05:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-16 07:05:43,030 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 32 [2024-11-16 07:05:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:43,030 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-16 07:05:43,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-16 07:05:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 07:05:43,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:43,031 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 07:05:43,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 07:05:43,032 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:43,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1503367536, now seen corresponding path program 1 times [2024-11-16 07:05:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:43,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076820983] [2024-11-16 07:05:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:43,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477145631] [2024-11-16 07:05:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:43,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:43,064 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 07:05:43,065 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 07:05:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 07:05:43,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:43,257 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:05:43,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:43,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076820983] [2024-11-16 07:05:43,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:43,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477145631] [2024-11-16 07:05:43,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477145631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:43,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:43,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:05:43,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016911419] [2024-11-16 07:05:43,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:43,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:43,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:05:43,263 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:43,315 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-11-16 07:05:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:05:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-11-16 07:05:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:43,317 INFO L225 Difference]: With dead ends: 57 [2024-11-16 07:05:43,317 INFO L226 Difference]: Without dead ends: 54 [2024-11-16 07:05:43,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 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 07:05:43,319 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 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 07:05:43,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-16 07:05:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-16 07:05:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-16 07:05:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-11-16 07:05:43,336 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 37 [2024-11-16 07:05:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:43,337 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-11-16 07:05:43,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-11-16 07:05:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 07:05:43,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:43,339 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 07:05:43,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 07:05:43,543 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 07:05:43,544 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:43,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash 383673201, now seen corresponding path program 1 times [2024-11-16 07:05:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:43,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604067056] [2024-11-16 07:05:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:43,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:05:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 07:05:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 07:05:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 07:05:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:05:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604067056] [2024-11-16 07:05:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604067056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:05:43,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003267057] [2024-11-16 07:05:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:43,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:43,732 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 07:05:43,733 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 07:05:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:43,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 07:05:43,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:05:43,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:05:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003267057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:05:43,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:05:43,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-16 07:05:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050255284] [2024-11-16 07:05:43,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:05:43,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 07:05:43,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 07:05:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-16 07:05:43,917 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 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 07:05:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:44,108 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2024-11-16 07:05:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 07:05:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 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 39 [2024-11-16 07:05:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:44,111 INFO L225 Difference]: With dead ends: 118 [2024-11-16 07:05:44,112 INFO L226 Difference]: Without dead ends: 110 [2024-11-16 07:05:44,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-16 07:05:44,113 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:44,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 384 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:05:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-16 07:05:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2024-11-16 07:05:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.2) internal successors, (72), 61 states have internal predecessors, (72), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-16 07:05:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2024-11-16 07:05:44,132 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 39 [2024-11-16 07:05:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:44,134 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2024-11-16 07:05:44,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 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 07:05:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2024-11-16 07:05:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-16 07:05:44,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:44,136 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 07:05:44,152 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 07:05:44,341 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 07:05:44,342 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:44,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1151148547, now seen corresponding path program 1 times [2024-11-16 07:05:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:44,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971538542] [2024-11-16 07:05:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:44,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:44,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678506183] [2024-11-16 07:05:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:44,355 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 07:05:44,357 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 07:05:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:44,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 07:05:44,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:44,466 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:05:44,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971538542] [2024-11-16 07:05:44,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678506183] [2024-11-16 07:05:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678506183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:05:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464599194] [2024-11-16 07:05:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:44,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:05:44,468 INFO L87 Difference]: Start difference. First operand 81 states and 105 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, (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 07:05:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:44,508 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2024-11-16 07:05:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:05:44,508 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, (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 42 [2024-11-16 07:05:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:44,513 INFO L225 Difference]: With dead ends: 90 [2024-11-16 07:05:44,513 INFO L226 Difference]: Without dead ends: 87 [2024-11-16 07:05:44,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 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 07:05:44,514 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:44,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-16 07:05:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-11-16 07:05:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 64 states have internal predecessors, (75), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-16 07:05:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2024-11-16 07:05:44,523 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 42 [2024-11-16 07:05:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:44,523 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2024-11-16 07:05:44,524 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, (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 07:05:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2024-11-16 07:05:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-16 07:05:44,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:44,525 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-16 07:05:44,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 07:05:44,728 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 07:05:44,729 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:44,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 652942634, now seen corresponding path program 1 times [2024-11-16 07:05:44,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:44,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499162853] [2024-11-16 07:05:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:44,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998406687] [2024-11-16 07:05:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:44,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:44,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:44,754 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 07:05:44,755 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 07:05:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:44,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 07:05:44,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:44,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:45,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499162853] [2024-11-16 07:05:45,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998406687] [2024-11-16 07:05:45,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998406687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:05:45,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:05:45,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-16 07:05:45,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479349425] [2024-11-16 07:05:45,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:05:45,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:05:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:05:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:05:45,034 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:45,199 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2024-11-16 07:05:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 07:05:45,200 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-16 07:05:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:45,201 INFO L225 Difference]: With dead ends: 129 [2024-11-16 07:05:45,202 INFO L226 Difference]: Without dead ends: 126 [2024-11-16 07:05:45,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-16 07:05:45,204 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 14 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:45,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 357 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:05:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-16 07:05:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2024-11-16 07:05:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 92 states have internal predecessors, (109), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-16 07:05:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2024-11-16 07:05:45,218 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 44 [2024-11-16 07:05:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:45,218 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2024-11-16 07:05:45,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2024-11-16 07:05:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 07:05:45,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:45,222 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 07:05:45,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 07:05:45,430 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 07:05:45,431 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:45,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash 898378352, now seen corresponding path program 1 times [2024-11-16 07:05:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:45,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318129032] [2024-11-16 07:05:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606511916] [2024-11-16 07:05:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:45,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:45,449 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 07:05:45,450 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 07:05:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:45,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:05:45,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 07:05:45,552 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:05:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318129032] [2024-11-16 07:05:45,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:45,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606511916] [2024-11-16 07:05:45,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606511916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:45,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:45,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:05:45,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848337145] [2024-11-16 07:05:45,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:45,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:05:45,554 INFO L87 Difference]: Start difference. First operand 122 states and 158 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 07:05:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:45,600 INFO L93 Difference]: Finished difference Result 176 states and 238 transitions. [2024-11-16 07:05:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:05:45,601 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 47 [2024-11-16 07:05:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:45,602 INFO L225 Difference]: With dead ends: 176 [2024-11-16 07:05:45,602 INFO L226 Difference]: Without dead ends: 173 [2024-11-16 07:05:45,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 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 07:05:45,605 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 140 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 07:05:45,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 140 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-16 07:05:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2024-11-16 07:05:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 116 states have internal predecessors, (140), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-16 07:05:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 229 transitions. [2024-11-16 07:05:45,635 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 229 transitions. Word has length 47 [2024-11-16 07:05:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:45,635 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 229 transitions. [2024-11-16 07:05:45,636 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 07:05:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 229 transitions. [2024-11-16 07:05:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-16 07:05:45,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:45,637 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-16 07:05:45,649 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 07:05:45,837 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 07:05:45,838 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:45,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1868349533, now seen corresponding path program 1 times [2024-11-16 07:05:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:45,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498606038] [2024-11-16 07:05:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108987602] [2024-11-16 07:05:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:45,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:45,850 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 07:05:45,851 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 07:05:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:45,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-16 07:05:45,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:46,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:46,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498606038] [2024-11-16 07:05:46,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:46,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108987602] [2024-11-16 07:05:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108987602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:05:46,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:05:46,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-16 07:05:46,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512786622] [2024-11-16 07:05:46,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 07:05:46,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 07:05:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 07:05:46,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-16 07:05:46,083 INFO L87 Difference]: Start difference. First operand 167 states and 229 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 07:05:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:46,213 INFO L93 Difference]: Finished difference Result 181 states and 241 transitions. [2024-11-16 07:05:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 07:05:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-11-16 07:05:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:46,215 INFO L225 Difference]: With dead ends: 181 [2024-11-16 07:05:46,215 INFO L226 Difference]: Without dead ends: 178 [2024-11-16 07:05:46,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-16 07:05:46,216 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:46,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 258 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:05:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-16 07:05:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2024-11-16 07:05:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 122 states have internal predecessors, (146), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-16 07:05:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 235 transitions. [2024-11-16 07:05:46,239 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 235 transitions. Word has length 49 [2024-11-16 07:05:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:46,240 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 235 transitions. [2024-11-16 07:05:46,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 07:05:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 235 transitions. [2024-11-16 07:05:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-16 07:05:46,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:46,243 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1] [2024-11-16 07:05:46,256 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 07:05:46,443 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 07:05:46,443 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:46,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:46,444 INFO L85 PathProgramCache]: Analyzing trace with hash 503958941, now seen corresponding path program 1 times [2024-11-16 07:05:46,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:46,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392976451] [2024-11-16 07:05:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:46,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:46,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72864475] [2024-11-16 07:05:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:46,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:46,454 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 07:05:46,459 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 07:05:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:46,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:05:46,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-16 07:05:46,536 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:05:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392976451] [2024-11-16 07:05:46,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72864475] [2024-11-16 07:05:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72864475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:46,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:46,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:05:46,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458508259] [2024-11-16 07:05:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:46,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:05:46,538 INFO L87 Difference]: Start difference. First operand 175 states and 235 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 07:05:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:46,596 INFO L93 Difference]: Finished difference Result 257 states and 366 transitions. [2024-11-16 07:05:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:05:46,596 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 52 [2024-11-16 07:05:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:46,598 INFO L225 Difference]: With dead ends: 257 [2024-11-16 07:05:46,598 INFO L226 Difference]: Without dead ends: 254 [2024-11-16 07:05:46,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 07:05:46,599 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 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 07:05:46,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-16 07:05:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 239. [2024-11-16 07:05:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 155 states have internal predecessors, (169), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (84), 74 states have call predecessors, (84), 84 states have call successors, (84) [2024-11-16 07:05:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 338 transitions. [2024-11-16 07:05:46,622 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 338 transitions. Word has length 52 [2024-11-16 07:05:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:46,622 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 338 transitions. [2024-11-16 07:05:46,622 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 07:05:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 338 transitions. [2024-11-16 07:05:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 07:05:46,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:46,623 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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 07:05:46,635 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 07:05:46,827 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 07:05:46,828 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:46,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1382437552, now seen corresponding path program 2 times [2024-11-16 07:05:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:46,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953423603] [2024-11-16 07:05:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:46,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:05:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:46,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 07:05:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:46,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 07:05:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:46,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 07:05:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:05:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953423603] [2024-11-16 07:05:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953423603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:46,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:46,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:05:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610423645] [2024-11-16 07:05:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:46,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:46,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:05:46,880 INFO L87 Difference]: Start difference. First operand 239 states and 338 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:46,965 INFO L93 Difference]: Finished difference Result 302 states and 421 transitions. [2024-11-16 07:05:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 07:05:46,965 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-11-16 07:05:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:46,968 INFO L225 Difference]: With dead ends: 302 [2024-11-16 07:05:46,968 INFO L226 Difference]: Without dead ends: 205 [2024-11-16 07:05:46,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 07:05:46,971 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 23 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 185 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 07:05:46,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 185 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:05:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-16 07:05:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2024-11-16 07:05:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 125 states have internal predecessors, (132), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-16 07:05:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 269 transitions. [2024-11-16 07:05:46,994 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 269 transitions. Word has length 51 [2024-11-16 07:05:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:46,994 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 269 transitions. [2024-11-16 07:05:46,994 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:05:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 269 transitions. [2024-11-16 07:05:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-16 07:05:46,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:46,996 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-11-16 07:05:46,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 07:05:46,996 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:46,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 538614248, now seen corresponding path program 1 times [2024-11-16 07:05:46,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:46,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497421639] [2024-11-16 07:05:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:46,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:47,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965305404] [2024-11-16 07:05:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:47,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:47,019 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 07:05:47,020 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 07:05:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:47,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-16 07:05:47,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-16 07:05:47,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-16 07:05:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497421639] [2024-11-16 07:05:48,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965305404] [2024-11-16 07:05:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965305404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:05:48,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:05:48,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-16 07:05:48,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201660173] [2024-11-16 07:05:48,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:05:48,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 07:05:48,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 07:05:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-16 07:05:48,437 INFO L87 Difference]: Start difference. First operand 195 states and 269 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-16 07:05:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:51,189 INFO L93 Difference]: Finished difference Result 526 states and 746 transitions. [2024-11-16 07:05:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-16 07:05:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 66 [2024-11-16 07:05:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:51,194 INFO L225 Difference]: With dead ends: 526 [2024-11-16 07:05:51,194 INFO L226 Difference]: Without dead ends: 405 [2024-11-16 07:05:51,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-16 07:05:51,196 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 226 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:51,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 487 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-16 07:05:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-16 07:05:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2024-11-16 07:05:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 199 states have (on average 1.1557788944723617) internal successors, (230), 206 states have internal predecessors, (230), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-16 07:05:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2024-11-16 07:05:51,264 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2024-11-16 07:05:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:51,264 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2024-11-16 07:05:51,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-16 07:05:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2024-11-16 07:05:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-16 07:05:51,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:51,266 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1, 1, 1] [2024-11-16 07:05:51,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-16 07:05:51,469 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 07:05:51,470 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:51,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:51,470 INFO L85 PathProgramCache]: Analyzing trace with hash -308189961, now seen corresponding path program 1 times [2024-11-16 07:05:51,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:51,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064790103] [2024-11-16 07:05:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:51,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033684585] [2024-11-16 07:05:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:51,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:51,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:51,481 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 07:05:51,482 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 07:05:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:51,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 07:05:51,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-16 07:05:51,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-11-16 07:05:51,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064790103] [2024-11-16 07:05:51,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033684585] [2024-11-16 07:05:51,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033684585] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 07:05:51,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:05:51,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-16 07:05:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597876738] [2024-11-16 07:05:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:51,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:51,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:51,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 07:05:51,628 INFO L87 Difference]: Start difference. First operand 305 states and 415 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 07:05:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:51,704 INFO L93 Difference]: Finished difference Result 312 states and 421 transitions. [2024-11-16 07:05:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:05:51,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2024-11-16 07:05:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:51,706 INFO L225 Difference]: With dead ends: 312 [2024-11-16 07:05:51,706 INFO L226 Difference]: Without dead ends: 309 [2024-11-16 07:05:51,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 141 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 07:05:51,706 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 142 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 07:05:51,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 142 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-16 07:05:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2024-11-16 07:05:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 202 states have (on average 1.1534653465346534) internal successors, (233), 209 states have internal predecessors, (233), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-16 07:05:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 418 transitions. [2024-11-16 07:05:51,767 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 418 transitions. Word has length 75 [2024-11-16 07:05:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:51,767 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 418 transitions. [2024-11-16 07:05:51,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 07:05:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 418 transitions. [2024-11-16 07:05:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-16 07:05:51,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:51,768 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2024-11-16 07:05:51,780 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 07:05:51,969 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 07:05:51,969 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:51,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2085625555, now seen corresponding path program 1 times [2024-11-16 07:05:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513765447] [2024-11-16 07:05:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:51,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331870312] [2024-11-16 07:05:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:51,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:51,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:51,983 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 07:05:51,984 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 07:05:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:52,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 07:05:52,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 07:05:52,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 07:05:52,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513765447] [2024-11-16 07:05:52,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331870312] [2024-11-16 07:05:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331870312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:05:52,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:05:52,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-16 07:05:52,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558397423] [2024-11-16 07:05:52,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:05:52,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 07:05:52,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 07:05:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-16 07:05:52,600 INFO L87 Difference]: Start difference. First operand 309 states and 418 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 19 states have internal predecessors, (78), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-16 07:05:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:54,316 INFO L93 Difference]: Finished difference Result 383 states and 520 transitions. [2024-11-16 07:05:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 07:05:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 19 states have internal predecessors, (78), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2024-11-16 07:05:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:54,319 INFO L225 Difference]: With dead ends: 383 [2024-11-16 07:05:54,320 INFO L226 Difference]: Without dead ends: 380 [2024-11-16 07:05:54,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-11-16 07:05:54,322 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 140 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:54,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 757 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-16 07:05:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-11-16 07:05:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 317. [2024-11-16 07:05:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 215 states have internal predecessors, (239), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-16 07:05:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2024-11-16 07:05:54,398 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 424 transitions. Word has length 78 [2024-11-16 07:05:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:54,398 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 424 transitions. [2024-11-16 07:05:54,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 19 states have internal predecessors, (78), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-16 07:05:54,399 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 424 transitions. [2024-11-16 07:05:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-16 07:05:54,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:54,399 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-11-16 07:05:54,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 07:05:54,600 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 07:05:54,600 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:54,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash -882752627, now seen corresponding path program 2 times [2024-11-16 07:05:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:54,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674848518] [2024-11-16 07:05:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:54,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:05:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 07:05:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 07:05:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 07:05:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-16 07:05:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-16 07:05:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-16 07:05:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-16 07:05:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-16 07:05:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-16 07:05:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-16 07:05:54,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:54,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674848518] [2024-11-16 07:05:54,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674848518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:05:54,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:05:54,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:05:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19262865] [2024-11-16 07:05:54,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:05:54,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:05:54,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:54,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:05:54,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:05:54,685 INFO L87 Difference]: Start difference. First operand 317 states and 424 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 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 07:05:54,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:54,791 INFO L93 Difference]: Finished difference Result 543 states and 729 transitions. [2024-11-16 07:05:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:05:54,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 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 81 [2024-11-16 07:05:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:54,793 INFO L225 Difference]: With dead ends: 543 [2024-11-16 07:05:54,793 INFO L226 Difference]: Without dead ends: 343 [2024-11-16 07:05:54,793 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 07:05:54,794 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:54,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 140 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:05:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-16 07:05:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 327. [2024-11-16 07:05:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 218 states have (on average 1.151376146788991) internal successors, (251), 219 states have internal predecessors, (251), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-16 07:05:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 436 transitions. [2024-11-16 07:05:54,862 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 436 transitions. Word has length 81 [2024-11-16 07:05:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:54,863 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 436 transitions. [2024-11-16 07:05:54,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 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 07:05:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 436 transitions. [2024-11-16 07:05:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-16 07:05:54,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:54,863 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2024-11-16 07:05:54,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-16 07:05:54,864 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:54,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash 156730752, now seen corresponding path program 3 times [2024-11-16 07:05:54,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:54,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867967209] [2024-11-16 07:05:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:54,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907893383] [2024-11-16 07:05:54,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:05:54,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:54,877 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 07:05:54,878 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 07:05:54,921 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 07:05:54,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:05:54,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-16 07:05:54,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:05:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-16 07:05:55,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:05:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:05:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867967209] [2024-11-16 07:05:58,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:05:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907893383] [2024-11-16 07:05:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907893383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:05:58,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:05:58,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-16 07:05:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988519434] [2024-11-16 07:05:58,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 07:05:58,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 07:05:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:05:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 07:05:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-11-16 07:05:58,997 INFO L87 Difference]: Start difference. First operand 327 states and 436 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-16 07:05:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:05:59,555 INFO L93 Difference]: Finished difference Result 405 states and 530 transitions. [2024-11-16 07:05:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 07:05:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2024-11-16 07:05:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:05:59,557 INFO L225 Difference]: With dead ends: 405 [2024-11-16 07:05:59,557 INFO L226 Difference]: Without dead ends: 402 [2024-11-16 07:05:59,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-11-16 07:05:59,558 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 63 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 07:05:59,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 604 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 07:05:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-16 07:05:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2024-11-16 07:05:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 260 states have (on average 1.146153846153846) internal successors, (298), 261 states have internal predecessors, (298), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-16 07:05:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 515 transitions. [2024-11-16 07:05:59,641 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 515 transitions. Word has length 83 [2024-11-16 07:05:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:05:59,641 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 515 transitions. [2024-11-16 07:05:59,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-16 07:05:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 515 transitions. [2024-11-16 07:05:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-16 07:05:59,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:05:59,643 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-16 07:05:59,655 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 07:05:59,846 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 07:05:59,846 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:05:59,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:05:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash -382848575, now seen corresponding path program 1 times [2024-11-16 07:05:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:05:59,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823315568] [2024-11-16 07:05:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:05:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:05:59,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117881151] [2024-11-16 07:05:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:05:59,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:05:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:05:59,864 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 07:05:59,865 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 07:05:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:05:59,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 07:05:59,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-16 07:06:00,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-16 07:06:00,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:00,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823315568] [2024-11-16 07:06:00,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:00,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117881151] [2024-11-16 07:06:00,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117881151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:06:00,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:06:00,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-11-16 07:06:00,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320096657] [2024-11-16 07:06:00,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:00,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 07:06:00,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 07:06:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-16 07:06:00,639 INFO L87 Difference]: Start difference. First operand 390 states and 515 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-16 07:06:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:02,595 INFO L93 Difference]: Finished difference Result 979 states and 1449 transitions. [2024-11-16 07:06:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-16 07:06:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 97 [2024-11-16 07:06:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:02,600 INFO L225 Difference]: With dead ends: 979 [2024-11-16 07:06:02,600 INFO L226 Difference]: Without dead ends: 976 [2024-11-16 07:06:02,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 07:06:02,601 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 184 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:02,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 563 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 07:06:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2024-11-16 07:06:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 787. [2024-11-16 07:06:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 458 states have (on average 1.2096069868995634) internal successors, (554), 459 states have internal predecessors, (554), 305 states have call successors, (305), 23 states have call predecessors, (305), 23 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2024-11-16 07:06:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1163 transitions. [2024-11-16 07:06:02,873 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1163 transitions. Word has length 97 [2024-11-16 07:06:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:02,874 INFO L471 AbstractCegarLoop]: Abstraction has 787 states and 1163 transitions. [2024-11-16 07:06:02,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-16 07:06:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1163 transitions. [2024-11-16 07:06:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-16 07:06:02,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:02,875 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-16 07:06:02,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 07:06:03,079 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 07:06:03,080 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:03,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1581530788, now seen corresponding path program 1 times [2024-11-16 07:06:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:03,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777863002] [2024-11-16 07:06:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:06:03,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626033595] [2024-11-16 07:06:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:03,100 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 07:06:03,101 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 07:06:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:03,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-16 07:06:03,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-16 07:06:04,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:06,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777863002] [2024-11-16 07:06:06,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626033595] [2024-11-16 07:06:06,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626033595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:06:06,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:06:06,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-16 07:06:06,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701934511] [2024-11-16 07:06:06,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:06,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 07:06:06,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 07:06:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-16 07:06:06,458 INFO L87 Difference]: Start difference. First operand 787 states and 1163 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-16 07:06:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:08,570 INFO L93 Difference]: Finished difference Result 937 states and 1384 transitions. [2024-11-16 07:06:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 07:06:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 96 [2024-11-16 07:06:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:08,574 INFO L225 Difference]: With dead ends: 937 [2024-11-16 07:06:08,574 INFO L226 Difference]: Without dead ends: 929 [2024-11-16 07:06:08,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-11-16 07:06:08,575 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 103 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:08,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 822 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 07:06:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2024-11-16 07:06:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 912. [2024-11-16 07:06:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 525 states have (on average 1.2152380952380952) internal successors, (638), 526 states have internal predecessors, (638), 361 states have call successors, (361), 25 states have call predecessors, (361), 25 states have return successors, (360), 360 states have call predecessors, (360), 360 states have call successors, (360) [2024-11-16 07:06:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1359 transitions. [2024-11-16 07:06:08,921 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1359 transitions. Word has length 96 [2024-11-16 07:06:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:08,922 INFO L471 AbstractCegarLoop]: Abstraction has 912 states and 1359 transitions. [2024-11-16 07:06:08,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-16 07:06:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1359 transitions. [2024-11-16 07:06:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-16 07:06:08,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:08,923 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 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, 1, 1, 1, 1] [2024-11-16 07:06:08,939 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 07:06:09,127 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 07:06:09,127 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:09,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -471812428, now seen corresponding path program 1 times [2024-11-16 07:06:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:09,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531839041] [2024-11-16 07:06:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:06:09,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327816605] [2024-11-16 07:06:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:09,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:09,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:09,151 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 07:06:09,152 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 07:06:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:09,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-16 07:06:09,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-16 07:06:09,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-16 07:06:10,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:10,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531839041] [2024-11-16 07:06:10,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:10,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327816605] [2024-11-16 07:06:10,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327816605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:06:10,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:06:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-16 07:06:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963564822] [2024-11-16 07:06:10,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:10,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 07:06:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 07:06:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-16 07:06:10,979 INFO L87 Difference]: Start difference. First operand 912 states and 1359 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 20 states have internal predecessors, (70), 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 07:06:17,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:17,633 INFO L93 Difference]: Finished difference Result 1262 states and 1879 transitions. [2024-11-16 07:06:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-16 07:06:17,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 20 states have internal predecessors, (70), 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 99 [2024-11-16 07:06:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:17,638 INFO L225 Difference]: With dead ends: 1262 [2024-11-16 07:06:17,638 INFO L226 Difference]: Without dead ends: 1259 [2024-11-16 07:06:17,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=711, Invalid=2829, Unknown=0, NotChecked=0, Total=3540 [2024-11-16 07:06:17,640 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 218 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:17,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 822 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-16 07:06:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2024-11-16 07:06:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1157. [2024-11-16 07:06:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 670 states have (on average 1.2223880597014924) internal successors, (819), 671 states have internal predecessors, (819), 457 states have call successors, (457), 29 states have call predecessors, (457), 29 states have return successors, (456), 456 states have call predecessors, (456), 456 states have call successors, (456) [2024-11-16 07:06:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1732 transitions. [2024-11-16 07:06:18,227 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1732 transitions. Word has length 99 [2024-11-16 07:06:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:18,227 INFO L471 AbstractCegarLoop]: Abstraction has 1157 states and 1732 transitions. [2024-11-16 07:06:18,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 20 states have internal predecessors, (70), 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 07:06:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1732 transitions. [2024-11-16 07:06:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-16 07:06:18,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:18,229 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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 07:06:18,241 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 07:06:18,432 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 07:06:18,432 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:18,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash -117331861, now seen corresponding path program 2 times [2024-11-16 07:06:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079364079] [2024-11-16 07:06:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:06:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 07:06:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 07:06:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 07:06:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-16 07:06:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-16 07:06:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-16 07:06:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-16 07:06:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-16 07:06:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-16 07:06:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-16 07:06:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-16 07:06:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:06:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-16 07:06:18,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079364079] [2024-11-16 07:06:18,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079364079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:06:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145797666] [2024-11-16 07:06:18,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:06:18,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:18,600 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 07:06:18,601 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 07:06:18,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:06:18,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:06:18,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 07:06:18,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-16 07:06:18,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-16 07:06:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145797666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:06:18,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:06:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-11-16 07:06:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115156415] [2024-11-16 07:06:18,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:18,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 07:06:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 07:06:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-16 07:06:18,809 INFO L87 Difference]: Start difference. First operand 1157 states and 1732 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-16 07:06:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:19,765 INFO L93 Difference]: Finished difference Result 1287 states and 1919 transitions. [2024-11-16 07:06:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 07:06:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 107 [2024-11-16 07:06:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:19,772 INFO L225 Difference]: With dead ends: 1287 [2024-11-16 07:06:19,772 INFO L226 Difference]: Without dead ends: 1279 [2024-11-16 07:06:19,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 235 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 07:06:19,773 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 86 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:19,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 486 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 07:06:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2024-11-16 07:06:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1117. [2024-11-16 07:06:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 638 states have (on average 1.2272727272727273) internal successors, (783), 639 states have internal predecessors, (783), 449 states have call successors, (449), 29 states have call predecessors, (449), 29 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2024-11-16 07:06:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1680 transitions. [2024-11-16 07:06:20,353 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1680 transitions. Word has length 107 [2024-11-16 07:06:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:20,354 INFO L471 AbstractCegarLoop]: Abstraction has 1117 states and 1680 transitions. [2024-11-16 07:06:20,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-16 07:06:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1680 transitions. [2024-11-16 07:06:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-16 07:06:20,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:20,355 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:06:20,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-16 07:06:20,555 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 07:06:20,556 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:20,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1115104424, now seen corresponding path program 2 times [2024-11-16 07:06:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:20,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226308491] [2024-11-16 07:06:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:06:20,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650702087] [2024-11-16 07:06:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:06:20,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:20,573 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 07:06:20,574 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 07:06:20,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:06:20,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:06:20,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 07:06:20,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 07:06:21,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 07:06:22,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226308491] [2024-11-16 07:06:22,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650702087] [2024-11-16 07:06:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650702087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:06:22,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:06:22,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-16 07:06:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68760643] [2024-11-16 07:06:22,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:22,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 07:06:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 07:06:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-16 07:06:22,676 INFO L87 Difference]: Start difference. First operand 1117 states and 1680 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-16 07:06:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:29,321 INFO L93 Difference]: Finished difference Result 1448 states and 2168 transitions. [2024-11-16 07:06:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-16 07:06:29,322 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 112 [2024-11-16 07:06:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:29,327 INFO L225 Difference]: With dead ends: 1448 [2024-11-16 07:06:29,327 INFO L226 Difference]: Without dead ends: 1439 [2024-11-16 07:06:29,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=778, Invalid=3128, Unknown=0, NotChecked=0, Total=3906 [2024-11-16 07:06:29,329 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 219 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:29,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 834 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-16 07:06:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2024-11-16 07:06:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1304. [2024-11-16 07:06:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 756 states have (on average 1.2248677248677249) internal successors, (926), 757 states have internal predecessors, (926), 513 states have call successors, (513), 34 states have call predecessors, (513), 34 states have return successors, (512), 512 states have call predecessors, (512), 512 states have call successors, (512) [2024-11-16 07:06:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1951 transitions. [2024-11-16 07:06:30,026 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1951 transitions. Word has length 112 [2024-11-16 07:06:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:30,026 INFO L471 AbstractCegarLoop]: Abstraction has 1304 states and 1951 transitions. [2024-11-16 07:06:30,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-16 07:06:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1951 transitions. [2024-11-16 07:06:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-16 07:06:30,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:30,027 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 5, 4, 4, 4, 3, 3, 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] [2024-11-16 07:06:30,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-16 07:06:30,227 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 07:06:30,228 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:30,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash -229300873, now seen corresponding path program 4 times [2024-11-16 07:06:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791558313] [2024-11-16 07:06:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:06:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550298126] [2024-11-16 07:06:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 07:06:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:30,246 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 07:06:30,247 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 07:06:30,300 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 07:06:30,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:06:30,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-16 07:06:30,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-16 07:06:31,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-16 07:06:37,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791558313] [2024-11-16 07:06:37,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550298126] [2024-11-16 07:06:37,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550298126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:06:37,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:06:37,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-11-16 07:06:37,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12126018] [2024-11-16 07:06:37,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:37,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-16 07:06:37,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:37,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-16 07:06:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=796, Unknown=1, NotChecked=0, Total=930 [2024-11-16 07:06:37,342 INFO L87 Difference]: Start difference. First operand 1304 states and 1951 transitions. Second operand has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 28 states have internal predecessors, (92), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-16 07:06:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:42,799 INFO L93 Difference]: Finished difference Result 1489 states and 2186 transitions. [2024-11-16 07:06:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-16 07:06:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 28 states have internal predecessors, (92), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 110 [2024-11-16 07:06:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:42,806 INFO L225 Difference]: With dead ends: 1489 [2024-11-16 07:06:42,806 INFO L226 Difference]: Without dead ends: 1486 [2024-11-16 07:06:42,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=656, Invalid=2883, Unknown=1, NotChecked=0, Total=3540 [2024-11-16 07:06:42,808 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 198 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:42,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 834 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-16 07:06:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2024-11-16 07:06:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1366. [2024-11-16 07:06:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 806 states have (on average 1.2133995037220844) internal successors, (978), 809 states have internal predecessors, (978), 517 states have call successors, (517), 42 states have call predecessors, (517), 42 states have return successors, (516), 514 states have call predecessors, (516), 516 states have call successors, (516) [2024-11-16 07:06:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2011 transitions. [2024-11-16 07:06:43,602 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2011 transitions. Word has length 110 [2024-11-16 07:06:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:43,603 INFO L471 AbstractCegarLoop]: Abstraction has 1366 states and 2011 transitions. [2024-11-16 07:06:43,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 28 states have internal predecessors, (92), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-16 07:06:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2011 transitions. [2024-11-16 07:06:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-16 07:06:43,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:43,604 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-16 07:06:43,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-16 07:06:43,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:43,808 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:43,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -330692873, now seen corresponding path program 3 times [2024-11-16 07:06:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:43,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74999024] [2024-11-16 07:06:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:06:43,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751196801] [2024-11-16 07:06:43,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:06:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:43,822 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:06:43,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 07:06:43,902 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-16 07:06:43,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:06:43,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-16 07:06:43,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 07:06:44,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 07:06:46,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:46,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74999024] [2024-11-16 07:06:46,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:46,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751196801] [2024-11-16 07:06:46,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751196801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:06:46,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:06:46,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-16 07:06:46,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978959124] [2024-11-16 07:06:46,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:46,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 07:06:46,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 07:06:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-16 07:06:46,565 INFO L87 Difference]: Start difference. First operand 1366 states and 2011 transitions. Second operand has 22 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-16 07:06:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:06:51,529 INFO L93 Difference]: Finished difference Result 1701 states and 2500 transitions. [2024-11-16 07:06:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-16 07:06:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 116 [2024-11-16 07:06:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:06:51,536 INFO L225 Difference]: With dead ends: 1701 [2024-11-16 07:06:51,536 INFO L226 Difference]: Without dead ends: 1692 [2024-11-16 07:06:51,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2024-11-16 07:06:51,537 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:06:51,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 813 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-16 07:06:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2024-11-16 07:06:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1485. [2024-11-16 07:06:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 873 states have (on average 1.2130584192439862) internal successors, (1059), 876 states have internal predecessors, (1059), 565 states have call successors, (565), 46 states have call predecessors, (565), 46 states have return successors, (564), 562 states have call predecessors, (564), 564 states have call successors, (564) [2024-11-16 07:06:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2188 transitions. [2024-11-16 07:06:52,475 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2188 transitions. Word has length 116 [2024-11-16 07:06:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:06:52,475 INFO L471 AbstractCegarLoop]: Abstraction has 1485 states and 2188 transitions. [2024-11-16 07:06:52,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-16 07:06:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2188 transitions. [2024-11-16 07:06:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-16 07:06:52,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:06:52,477 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:06:52,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-16 07:06:52,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:52,678 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:06:52,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:06:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1458173243, now seen corresponding path program 4 times [2024-11-16 07:06:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:06:52,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245837997] [2024-11-16 07:06:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:06:52,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:06:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:06:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599235374] [2024-11-16 07:06:52,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 07:06:52,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:06:52,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:06:52,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:06:52,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 07:06:52,767 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 07:06:52,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:06:52,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-16 07:06:52,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:06:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 56 proven. 60 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-11-16 07:06:54,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:06:59,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:06:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245837997] [2024-11-16 07:06:59,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:06:59,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599235374] [2024-11-16 07:06:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599235374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:06:59,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:06:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-16 07:06:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633292036] [2024-11-16 07:06:59,521 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 07:06:59,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 07:06:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:06:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 07:06:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-11-16 07:06:59,522 INFO L87 Difference]: Start difference. First operand 1485 states and 2188 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-16 07:07:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:07:02,275 INFO L93 Difference]: Finished difference Result 1635 states and 2405 transitions. [2024-11-16 07:07:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 07:07:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 123 [2024-11-16 07:07:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:07:02,282 INFO L225 Difference]: With dead ends: 1635 [2024-11-16 07:07:02,282 INFO L226 Difference]: Without dead ends: 1627 [2024-11-16 07:07:02,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-11-16 07:07:02,283 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 106 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 07:07:02,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 772 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 07:07:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2024-11-16 07:07:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1603. [2024-11-16 07:07:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 934 states have (on average 1.2162740899357602) internal successors, (1136), 936 states have internal predecessors, (1136), 619 states have call successors, (619), 49 states have call predecessors, (619), 49 states have return successors, (618), 617 states have call predecessors, (618), 618 states have call successors, (618) [2024-11-16 07:07:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2373 transitions. [2024-11-16 07:07:03,302 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2373 transitions. Word has length 123 [2024-11-16 07:07:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:07:03,302 INFO L471 AbstractCegarLoop]: Abstraction has 1603 states and 2373 transitions. [2024-11-16 07:07:03,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-16 07:07:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2373 transitions. [2024-11-16 07:07:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-16 07:07:03,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:07:03,304 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:07:03,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-16 07:07:03,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:07:03,505 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:07:03,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:07:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1671777728, now seen corresponding path program 2 times [2024-11-16 07:07:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:07:03,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263167786] [2024-11-16 07:07:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:07:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:07:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:07:03,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558322693] [2024-11-16 07:07:03,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:07:03,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:07:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:07:03,525 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:07:03,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 07:07:03,584 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:07:03,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:07:03,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-16 07:07:03,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:07:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 58 proven. 77 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 07:07:05,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:07:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 58 proven. 65 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-16 07:07:12,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:07:12,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263167786] [2024-11-16 07:07:12,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:07:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558322693] [2024-11-16 07:07:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558322693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:07:12,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:07:12,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2024-11-16 07:07:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563068461] [2024-11-16 07:07:12,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:07:12,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-16 07:07:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:07:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-16 07:07:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 07:07:12,925 INFO L87 Difference]: Start difference. First operand 1603 states and 2373 transitions. Second operand has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 33 states have internal predecessors, (95), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33)