./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de32.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 be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 22:11:04,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 22:11:04,340 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 22:11:04,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 22:11:04,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 22:11:04,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 22:11:04,357 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 22:11:04,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 22:11:04,358 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 22:11:04,358 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 22:11:04,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 22:11:04,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 22:11:04,359 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 22:11:04,359 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 22:11:04,360 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 22:11:04,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 22:11:04,360 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 22:11:04,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 22:11:04,361 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 22:11:04,361 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 22:11:04,361 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 22:11:04,362 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 22:11:04,362 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 22:11:04,362 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 22:11:04,363 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 22:11:04,363 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 22:11:04,363 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 22:11:04,364 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 22:11:04,364 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 22:11:04,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 22:11:04,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 22:11:04,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:11:04,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 22:11:04,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 22:11:04,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 22:11:04,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 22:11:04,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 22:11:04,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 22:11:04,367 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 22:11:04,367 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 22:11:04,367 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 22:11:04,367 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 22:11:04,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 22:11:04,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 22:11:04,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 22:11:04,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 22:11:04,531 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 22:11:04,532 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 22:11:04,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2023-11-22 22:11:05,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 22:11:05,651 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 22:11:05,652 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2023-11-22 22:11:05,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce58e8bca/c13fbb6f7ecf46f382a08f610c0565c4/FLAG79134a892 [2023-11-22 22:11:05,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce58e8bca/c13fbb6f7ecf46f382a08f610c0565c4 [2023-11-22 22:11:05,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 22:11:05,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 22:11:05,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 22:11:05,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 22:11:05,674 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 22:11:05,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b12400d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05, skipping insertion in model container [2023-11-22 22:11:05,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,688 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 22:11:05,784 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c[368,381] [2023-11-22 22:11:05,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:11:05,799 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 22:11:05,807 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c[368,381] [2023-11-22 22:11:05,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:11:05,819 INFO L206 MainTranslator]: Completed translation [2023-11-22 22:11:05,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05 WrapperNode [2023-11-22 22:11:05,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 22:11:05,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 22:11:05,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 22:11:05,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 22:11:05,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,844 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-22 22:11:05,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 22:11:05,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 22:11:05,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 22:11:05,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 22:11:05,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,869 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,881 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-22 22:11:05,882 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,882 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 22:11:05,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 22:11:05,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 22:11:05,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 22:11:05,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (1/1) ... [2023-11-22 22:11:05,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:11:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:05,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 22:11:05,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 22:11:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 22:11:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 22:11:06,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 22:11:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 22:11:06,049 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 22:11:06,051 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 22:11:06,161 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 22:11:06,175 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 22:11:06,179 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 22:11:06,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:11:06 BoogieIcfgContainer [2023-11-22 22:11:06,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 22:11:06,181 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 22:11:06,181 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 22:11:06,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 22:11:06,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:11:05" (1/3) ... [2023-11-22 22:11:06,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616145a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:11:06, skipping insertion in model container [2023-11-22 22:11:06,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:11:05" (2/3) ... [2023-11-22 22:11:06,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616145a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:11:06, skipping insertion in model container [2023-11-22 22:11:06,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:11:06" (3/3) ... [2023-11-22 22:11:06,186 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2023-11-22 22:11:06,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 22:11:06,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 22:11:06,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 22:11:06,232 INFO L357 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, mHoare=true, 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;@1a723f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 22:11:06,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 22:11:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-22 22:11:06,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:06,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:06,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:06,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash -593791358, now seen corresponding path program 1 times [2023-11-22 22:11:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:06,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185715902] [2023-11-22 22:11:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:06,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:06,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185715902] [2023-11-22 22:11:06,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185715902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:11:06,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:11:06,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 22:11:06,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72781962] [2023-11-22 22:11:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:11:06,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:11:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:11:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 22:11:06,485 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:06,550 INFO L93 Difference]: Finished difference Result 25 states and 40 transitions. [2023-11-22 22:11:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 22:11:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-22 22:11:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:06,557 INFO L225 Difference]: With dead ends: 25 [2023-11-22 22:11:06,557 INFO L226 Difference]: Without dead ends: 11 [2023-11-22 22:11:06,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 22:11:06,562 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:06,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-22 22:11:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-22 22:11:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-11-22 22:11:06,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2023-11-22 22:11:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:06,605 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-11-22 22:11:06,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-11-22 22:11:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 22:11:06,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:06,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 22:11:06,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:06,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1225997519, now seen corresponding path program 1 times [2023-11-22 22:11:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636782215] [2023-11-22 22:11:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:06,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636782215] [2023-11-22 22:11:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636782215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:11:06,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:11:06,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 22:11:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321244599] [2023-11-22 22:11:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:11:06,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:11:06,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:11:06,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:11:06,679 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:06,691 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-22 22:11:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:11:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-22 22:11:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:06,692 INFO L225 Difference]: With dead ends: 26 [2023-11-22 22:11:06,692 INFO L226 Difference]: Without dead ends: 20 [2023-11-22 22:11:06,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:11:06,694 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:06,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-22 22:11:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-22 22:11:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-11-22 22:11:06,698 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2023-11-22 22:11:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-11-22 22:11:06,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-11-22 22:11:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 22:11:06,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:06,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:06,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 22:11:06,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:06,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1180744990, now seen corresponding path program 1 times [2023-11-22 22:11:06,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:06,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10029774] [2023-11-22 22:11:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:06,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10029774] [2023-11-22 22:11:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10029774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:11:06,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:11:06,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:11:06,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561398666] [2023-11-22 22:11:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:11:06,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:11:06,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:06,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:11:06,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 22:11:06,857 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:06,894 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-22 22:11:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:11:06,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-22 22:11:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:06,895 INFO L225 Difference]: With dead ends: 20 [2023-11-22 22:11:06,896 INFO L226 Difference]: Without dead ends: 12 [2023-11-22 22:11:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 22:11:06,897 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-22 22:11:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-22 22:11:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-22 22:11:06,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2023-11-22 22:11:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:06,907 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-22 22:11:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-22 22:11:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 22:11:06,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:06,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:06,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 22:11:06,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:06,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1468808784, now seen corresponding path program 1 times [2023-11-22 22:11:06,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170193628] [2023-11-22 22:11:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170193628] [2023-11-22 22:11:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170193628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629873280] [2023-11-22 22:11:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:07,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:07,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:07,016 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) [2023-11-22 22:11:07,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 22:11:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:07,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 22:11:07,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:07,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:07,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629873280] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:07,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:11:07,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-22 22:11:07,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441654362] [2023-11-22 22:11:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:11:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:11:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:11:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:11:07,161 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:07,181 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2023-11-22 22:11:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:11:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-22 22:11:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:07,182 INFO L225 Difference]: With dead ends: 17 [2023-11-22 22:11:07,182 INFO L226 Difference]: Without dead ends: 11 [2023-11-22 22:11:07,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:11:07,186 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:07,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-22 22:11:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-22 22:11:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-22 22:11:07,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 10 [2023-11-22 22:11:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:07,191 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-22 22:11:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-22 22:11:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 22:11:07,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:07,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:07,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 22:11:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:07,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:07,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1514061313, now seen corresponding path program 1 times [2023-11-22 22:11:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274814902] [2023-11-22 22:11:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274814902] [2023-11-22 22:11:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274814902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404175944] [2023-11-22 22:11:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:07,493 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) [2023-11-22 22:11:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 22:11:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:07,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 22:11:07,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:07,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404175944] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:07,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:11:07,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2023-11-22 22:11:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875326857] [2023-11-22 22:11:07,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:11:07,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:11:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:11:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:11:07,571 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:07,579 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-22 22:11:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:11:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-22 22:11:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:07,580 INFO L225 Difference]: With dead ends: 16 [2023-11-22 22:11:07,580 INFO L226 Difference]: Without dead ends: 12 [2023-11-22 22:11:07,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:11:07,581 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:07,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-22 22:11:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-22 22:11:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-22 22:11:07,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-11-22 22:11:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:07,584 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-22 22:11:07,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-22 22:11:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-22 22:11:07,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:07,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:07,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:07,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:07,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:07,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash -307074158, now seen corresponding path program 1 times [2023-11-22 22:11:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360869421] [2023-11-22 22:11:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360869421] [2023-11-22 22:11:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360869421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924297654] [2023-11-22 22:11:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:07,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:07,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:07,916 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) [2023-11-22 22:11:07,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 22:11:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:07,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 22:11:07,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:08,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:08,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924297654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:08,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:08,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-22 22:11:08,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942001533] [2023-11-22 22:11:08,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 22:11:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 22:11:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:11:08,068 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:08,094 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-22 22:11:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 22:11:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-22 22:11:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:08,096 INFO L225 Difference]: With dead ends: 19 [2023-11-22 22:11:08,096 INFO L226 Difference]: Without dead ends: 15 [2023-11-22 22:11:08,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:11:08,098 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:08,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-22 22:11:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-22 22:11:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-22 22:11:08,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-11-22 22:11:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:08,103 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-22 22:11:08,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-22 22:11:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 22:11:08,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:08,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:08,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:08,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:08,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:08,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash -927698911, now seen corresponding path program 2 times [2023-11-22 22:11:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:08,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209907186] [2023-11-22 22:11:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:08,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:08,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209907186] [2023-11-22 22:11:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209907186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826417848] [2023-11-22 22:11:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:11:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:08,376 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) [2023-11-22 22:11:08,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 22:11:08,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:11:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:08,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:11:08,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:08,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826417848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:08,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:08,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 6] total 10 [2023-11-22 22:11:08,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053553218] [2023-11-22 22:11:08,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:08,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 22:11:08,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 22:11:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-22 22:11:08,487 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:08,552 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-11-22 22:11:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 22:11:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-22 22:11:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:08,554 INFO L225 Difference]: With dead ends: 28 [2023-11-22 22:11:08,554 INFO L226 Difference]: Without dead ends: 14 [2023-11-22 22:11:08,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-22 22:11:08,555 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:08,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-22 22:11:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-22 22:11:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-22 22:11:08,561 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2023-11-22 22:11:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:08,561 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-22 22:11:08,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-22 22:11:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-22 22:11:08,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:08,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:08,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:08,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:08,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:08,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash -78994671, now seen corresponding path program 3 times [2023-11-22 22:11:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517638942] [2023-11-22 22:11:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:08,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:08,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517638942] [2023-11-22 22:11:08,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517638942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:08,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630628404] [2023-11-22 22:11:08,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:11:08,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:08,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:08,845 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) [2023-11-22 22:11:08,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 22:11:08,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 22:11:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:08,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 22:11:08,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:08,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630628404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:08,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:08,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-11-22 22:11:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458500004] [2023-11-22 22:11:08,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-22 22:11:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-22 22:11:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-22 22:11:08,952 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:09,011 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-11-22 22:11:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 22:11:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-22 22:11:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:09,013 INFO L225 Difference]: With dead ends: 43 [2023-11-22 22:11:09,013 INFO L226 Difference]: Without dead ends: 38 [2023-11-22 22:11:09,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:11:09,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:09,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-22 22:11:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2023-11-22 22:11:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-22 22:11:09,023 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2023-11-22 22:11:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:09,023 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-22 22:11:09,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-22 22:11:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 22:11:09,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:09,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:09,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-22 22:11:09,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:09,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:09,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1847797890, now seen corresponding path program 4 times [2023-11-22 22:11:09,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:09,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064981593] [2023-11-22 22:11:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:09,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064981593] [2023-11-22 22:11:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064981593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694997519] [2023-11-22 22:11:09,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:11:09,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:09,313 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) [2023-11-22 22:11:09,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 22:11:09,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:11:09,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:09,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 22:11:09,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:09,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:09,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694997519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:09,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-11-22 22:11:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108970892] [2023-11-22 22:11:09,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 22:11:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 22:11:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:11:09,427 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:09,462 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-22 22:11:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 22:11:09,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 22:11:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:09,463 INFO L225 Difference]: With dead ends: 35 [2023-11-22 22:11:09,463 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 22:11:09,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:11:09,464 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:09,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 22:11:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-22 22:11:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-22 22:11:09,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2023-11-22 22:11:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:09,470 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-22 22:11:09,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-22 22:11:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-22 22:11:09,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:09,471 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:09,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:09,682 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:09,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1986832546, now seen corresponding path program 5 times [2023-11-22 22:11:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11852650] [2023-11-22 22:11:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:09,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:09,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11852650] [2023-11-22 22:11:09,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11852650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:09,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278387551] [2023-11-22 22:11:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:11:09,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:09,750 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) [2023-11-22 22:11:09,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 22:11:09,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 22:11:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:09,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 22:11:09,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:09,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:11:09,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278387551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:09,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:09,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-11-22 22:11:09,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760968095] [2023-11-22 22:11:09,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:09,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:11:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:11:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:11:09,904 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:09,996 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2023-11-22 22:11:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 22:11:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-22 22:11:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:09,998 INFO L225 Difference]: With dead ends: 59 [2023-11-22 22:11:09,998 INFO L226 Difference]: Without dead ends: 47 [2023-11-22 22:11:09,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-11-22 22:11:09,999 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:09,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 52 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-22 22:11:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 17. [2023-11-22 22:11:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-22 22:11:10,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2023-11-22 22:11:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:10,004 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-22 22:11:10,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-22 22:11:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 22:11:10,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:10,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:10,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:10,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:10,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:10,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -904677104, now seen corresponding path program 6 times [2023-11-22 22:11:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176654696] [2023-11-22 22:11:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:10,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176654696] [2023-11-22 22:11:10,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176654696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214204381] [2023-11-22 22:11:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:11:10,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:10,285 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) [2023-11-22 22:11:10,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 22:11:10,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-22 22:11:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:10,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 22:11:10,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:10,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:10,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214204381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:10,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:10,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-22 22:11:10,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60261835] [2023-11-22 22:11:10,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:10,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:11:10,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:11:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:11:10,439 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:10,604 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-11-22 22:11:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 22:11:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-22 22:11:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:10,604 INFO L225 Difference]: With dead ends: 46 [2023-11-22 22:11:10,605 INFO L226 Difference]: Without dead ends: 35 [2023-11-22 22:11:10,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-11-22 22:11:10,605 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:10,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-22 22:11:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-22 22:11:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-22 22:11:10,627 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2023-11-22 22:11:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:10,627 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-22 22:11:10,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-22 22:11:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-22 22:11:10,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:10,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:10,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:10,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 22:11:10,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:10,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1519806738, now seen corresponding path program 7 times [2023-11-22 22:11:10,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:10,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336857859] [2023-11-22 22:11:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:10,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:10,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336857859] [2023-11-22 22:11:10,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336857859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:10,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013601619] [2023-11-22 22:11:10,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:11:10,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:10,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:10,937 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) [2023-11-22 22:11:10,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 22:11:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:10,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 22:11:10,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:11,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013601619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:11,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:11,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-11-22 22:11:11,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918238242] [2023-11-22 22:11:11,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:11,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:11:11,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:11:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:11:11,063 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:11,108 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-22 22:11:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:11:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-22 22:11:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:11,109 INFO L225 Difference]: With dead ends: 44 [2023-11-22 22:11:11,109 INFO L226 Difference]: Without dead ends: 36 [2023-11-22 22:11:11,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:11:11,110 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:11,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-22 22:11:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-11-22 22:11:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-22 22:11:11,124 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 17 [2023-11-22 22:11:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:11,124 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-22 22:11:11,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-22 22:11:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-22 22:11:11,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:11,125 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:11,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:11,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:11,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:11,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2026879586, now seen corresponding path program 8 times [2023-11-22 22:11:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106283541] [2023-11-22 22:11:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:11,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106283541] [2023-11-22 22:11:11,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106283541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558746590] [2023-11-22 22:11:11,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:11:11,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:11,457 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) [2023-11-22 22:11:11,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 22:11:11,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:11:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:11,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 22:11:11,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:11,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:11,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558746590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:11,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:11,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-22 22:11:11,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168305052] [2023-11-22 22:11:11,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:11,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 22:11:11,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 22:11:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-22 22:11:11,681 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:11,949 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-11-22 22:11:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 22:11:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-22 22:11:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:11,950 INFO L225 Difference]: With dead ends: 65 [2023-11-22 22:11:11,950 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 22:11:11,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2023-11-22 22:11:11,951 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:11,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 22:11:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2023-11-22 22:11:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-22 22:11:11,972 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 19 [2023-11-22 22:11:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:11,972 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-22 22:11:11,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-22 22:11:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 22:11:11,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:11,973 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:11,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:12,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 22:11:12,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:12,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash 759212432, now seen corresponding path program 9 times [2023-11-22 22:11:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:12,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184001260] [2023-11-22 22:11:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:12,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-22 22:11:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184001260] [2023-11-22 22:11:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184001260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301132230] [2023-11-22 22:11:12,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:11:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:12,265 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) [2023-11-22 22:11:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 22:11:12,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 22:11:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:12,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 22:11:12,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:12,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:11:12,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301132230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:12,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:12,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 23 [2023-11-22 22:11:12,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633932380] [2023-11-22 22:11:12,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:12,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 22:11:12,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 22:11:12,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-11-22 22:11:12,554 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:14,062 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2023-11-22 22:11:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-22 22:11:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-22 22:11:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:14,063 INFO L225 Difference]: With dead ends: 94 [2023-11-22 22:11:14,063 INFO L226 Difference]: Without dead ends: 74 [2023-11-22 22:11:14,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=667, Invalid=3889, Unknown=0, NotChecked=0, Total=4556 [2023-11-22 22:11:14,064 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 185 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:14,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 72 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:11:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-22 22:11:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2023-11-22 22:11:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-11-22 22:11:14,085 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 20 [2023-11-22 22:11:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:14,085 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-11-22 22:11:14,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:14,085 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-11-22 22:11:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 22:11:14,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:14,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:14,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-22 22:11:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 22:11:14,296 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 39467650, now seen corresponding path program 10 times [2023-11-22 22:11:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674728526] [2023-11-22 22:11:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:14,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:14,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674728526] [2023-11-22 22:11:14,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674728526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:14,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423236479] [2023-11-22 22:11:14,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:11:14,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:14,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:14,441 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) [2023-11-22 22:11:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 22:11:14,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:11:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:14,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 22:11:14,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:14,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423236479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:14,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:14,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 13 [2023-11-22 22:11:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597817530] [2023-11-22 22:11:14,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:14,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 22:11:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 22:11:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:11:14,652 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:14,908 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2023-11-22 22:11:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 22:11:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-22 22:11:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:14,909 INFO L225 Difference]: With dead ends: 112 [2023-11-22 22:11:14,909 INFO L226 Difference]: Without dead ends: 103 [2023-11-22 22:11:14,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2023-11-22 22:11:14,910 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:14,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-22 22:11:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2023-11-22 22:11:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2023-11-22 22:11:14,933 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 20 [2023-11-22 22:11:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:14,934 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2023-11-22 22:11:14,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2023-11-22 22:11:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-22 22:11:14,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:14,934 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:14,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:15,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 22:11:15,145 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:15,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1131183282, now seen corresponding path program 11 times [2023-11-22 22:11:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:15,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416299557] [2023-11-22 22:11:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:15,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:15,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416299557] [2023-11-22 22:11:15,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416299557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:15,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40745215] [2023-11-22 22:11:15,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:11:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:15,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:15,240 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) [2023-11-22 22:11:15,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 22:11:15,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 22:11:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:15,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 22:11:15,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:11:15,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 22:11:15,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40745215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:15,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:15,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 21 [2023-11-22 22:11:15,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720180275] [2023-11-22 22:11:15,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:11:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:11:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:11:15,445 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:15,730 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2023-11-22 22:11:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 22:11:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-22 22:11:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:15,731 INFO L225 Difference]: With dead ends: 117 [2023-11-22 22:11:15,731 INFO L226 Difference]: Without dead ends: 112 [2023-11-22 22:11:15,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2023-11-22 22:11:15,732 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:15,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 70 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:15,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-22 22:11:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2023-11-22 22:11:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2023-11-22 22:11:15,758 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 21 [2023-11-22 22:11:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:15,758 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2023-11-22 22:11:15,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2023-11-22 22:11:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 22:11:15,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:15,759 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:15,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 22:11:15,963 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:15,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash 493700754, now seen corresponding path program 12 times [2023-11-22 22:11:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018846585] [2023-11-22 22:11:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:16,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:16,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018846585] [2023-11-22 22:11:16,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018846585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:16,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233525378] [2023-11-22 22:11:16,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:11:16,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:16,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:16,093 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) [2023-11-22 22:11:16,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 22:11:16,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-22 22:11:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:16,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 22:11:16,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:16,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233525378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:16,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:16,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-11-22 22:11:16,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594952705] [2023-11-22 22:11:16,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 22:11:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 22:11:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-22 22:11:16,265 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:16,358 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2023-11-22 22:11:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 22:11:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-22 22:11:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:16,359 INFO L225 Difference]: With dead ends: 92 [2023-11-22 22:11:16,359 INFO L226 Difference]: Without dead ends: 82 [2023-11-22 22:11:16,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 16 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-22 22:11:16,360 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:16,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 22:11:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-22 22:11:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2023-11-22 22:11:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-11-22 22:11:16,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 23 [2023-11-22 22:11:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:16,389 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-11-22 22:11:16,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-11-22 22:11:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 22:11:16,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:16,390 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:16,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:16,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:16,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1285493521, now seen corresponding path program 13 times [2023-11-22 22:11:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304199595] [2023-11-22 22:11:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:16,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:16,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304199595] [2023-11-22 22:11:16,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304199595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:16,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335872608] [2023-11-22 22:11:16,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:11:16,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:16,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:16,758 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) [2023-11-22 22:11:16,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 22:11:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:16,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-22 22:11:16,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:16,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335872608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:17,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2023-11-22 22:11:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414887969] [2023-11-22 22:11:17,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 22:11:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 22:11:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2023-11-22 22:11:17,088 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:17,561 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2023-11-22 22:11:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-22 22:11:17,561 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-22 22:11:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:17,562 INFO L225 Difference]: With dead ends: 110 [2023-11-22 22:11:17,562 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 22:11:17,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1932, Unknown=0, NotChecked=0, Total=2256 [2023-11-22 22:11:17,563 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:17,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 110 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:11:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 22:11:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2023-11-22 22:11:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-11-22 22:11:17,613 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 23 [2023-11-22 22:11:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:17,613 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-11-22 22:11:17,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-11-22 22:11:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 22:11:17,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:17,614 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:17,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:17,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 22:11:17,825 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:17,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1987300734, now seen corresponding path program 14 times [2023-11-22 22:11:17,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:17,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107237920] [2023-11-22 22:11:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:17,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 22:11:17,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107237920] [2023-11-22 22:11:17,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107237920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191108209] [2023-11-22 22:11:17,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:11:17,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:17,930 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) [2023-11-22 22:11:17,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 22:11:17,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:11:17,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:17,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 22:11:17,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:18,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191108209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:18,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:18,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 29 [2023-11-22 22:11:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185225960] [2023-11-22 22:11:18,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 22:11:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 22:11:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2023-11-22 22:11:18,277 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:21,830 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2023-11-22 22:11:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-22 22:11:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-22 22:11:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:21,834 INFO L225 Difference]: With dead ends: 150 [2023-11-22 22:11:21,834 INFO L226 Difference]: Without dead ends: 125 [2023-11-22 22:11:21,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1297, Invalid=8405, Unknown=0, NotChecked=0, Total=9702 [2023-11-22 22:11:21,837 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 329 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:21,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 58 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 22:11:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-22 22:11:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 89. [2023-11-22 22:11:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 88 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2023-11-22 22:11:21,908 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 24 [2023-11-22 22:11:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:21,908 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2023-11-22 22:11:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2023-11-22 22:11:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 22:11:21,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:21,909 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:21,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:22,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:22,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:22,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1716098271, now seen corresponding path program 15 times [2023-11-22 22:11:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:22,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811957182] [2023-11-22 22:11:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:22,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:22,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811957182] [2023-11-22 22:11:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811957182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569494906] [2023-11-22 22:11:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:11:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:22,277 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) [2023-11-22 22:11:22,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 22:11:22,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 22:11:22,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:22,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 22:11:22,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:22,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:22,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569494906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:22,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:22,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 31 [2023-11-22 22:11:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258127214] [2023-11-22 22:11:22,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:22,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 22:11:22,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 22:11:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-11-22 22:11:22,703 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:23,767 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2023-11-22 22:11:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-22 22:11:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-22 22:11:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:23,768 INFO L225 Difference]: With dead ends: 135 [2023-11-22 22:11:23,768 INFO L226 Difference]: Without dead ends: 124 [2023-11-22 22:11:23,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=4298, Unknown=0, NotChecked=0, Total=5256 [2023-11-22 22:11:23,769 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 220 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:23,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 134 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:11:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-22 22:11:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2023-11-22 22:11:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2023-11-22 22:11:23,824 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 24 [2023-11-22 22:11:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:23,824 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2023-11-22 22:11:23,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2023-11-22 22:11:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 22:11:23,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:23,825 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:23,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:24,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:24,036 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:24,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash -553341822, now seen corresponding path program 16 times [2023-11-22 22:11:24,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:24,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140046618] [2023-11-22 22:11:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:24,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:24,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:24,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140046618] [2023-11-22 22:11:24,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140046618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:24,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716394917] [2023-11-22 22:11:24,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:11:24,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:24,186 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) [2023-11-22 22:11:24,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 22:11:24,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:11:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:24,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:11:24,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:24,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716394917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:24,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 13 [2023-11-22 22:11:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723975850] [2023-11-22 22:11:24,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:24,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 22:11:24,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:24,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 22:11:24,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:11:24,416 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:24,587 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2023-11-22 22:11:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 22:11:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-22 22:11:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:24,588 INFO L225 Difference]: With dead ends: 132 [2023-11-22 22:11:24,588 INFO L226 Difference]: Without dead ends: 121 [2023-11-22 22:11:24,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 18 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:11:24,589 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:24,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-22 22:11:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2023-11-22 22:11:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 97 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2023-11-22 22:11:24,637 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 26 [2023-11-22 22:11:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:24,637 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2023-11-22 22:11:24,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2023-11-22 22:11:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 22:11:24,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:24,638 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:24,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:24,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:24,849 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:24,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -753551854, now seen corresponding path program 17 times [2023-11-22 22:11:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:24,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134728593] [2023-11-22 22:11:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:24,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:24,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134728593] [2023-11-22 22:11:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134728593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549476004] [2023-11-22 22:11:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:11:24,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:24,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:24,992 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) [2023-11-22 22:11:25,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 22:11:25,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-22 22:11:25,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:25,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-22 22:11:25,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:25,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:25,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549476004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:25,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:25,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 32 [2023-11-22 22:11:25,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461090302] [2023-11-22 22:11:25,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:25,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-22 22:11:25,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-22 22:11:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2023-11-22 22:11:25,381 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:26,071 INFO L93 Difference]: Finished difference Result 183 states and 210 transitions. [2023-11-22 22:11:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-22 22:11:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-22 22:11:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:26,073 INFO L225 Difference]: With dead ends: 183 [2023-11-22 22:11:26,073 INFO L226 Difference]: Without dead ends: 162 [2023-11-22 22:11:26,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 22:11:26,085 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:26,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 127 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:11:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-22 22:11:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 82. [2023-11-22 22:11:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2023-11-22 22:11:26,137 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 27 [2023-11-22 22:11:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:26,137 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2023-11-22 22:11:26,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2023-11-22 22:11:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 22:11:26,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:26,138 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:26,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:26,342 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:26,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1081762814, now seen corresponding path program 18 times [2023-11-22 22:11:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:26,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901813429] [2023-11-22 22:11:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:26,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:26,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901813429] [2023-11-22 22:11:26,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901813429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728573195] [2023-11-22 22:11:26,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:11:26,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:26,547 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) [2023-11-22 22:11:26,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 22:11:26,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-22 22:11:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:26,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-22 22:11:26,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:26,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 22:11:26,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728573195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:26,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:26,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 35 [2023-11-22 22:11:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559516666] [2023-11-22 22:11:26,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-22 22:11:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-22 22:11:26,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2023-11-22 22:11:26,991 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:27,960 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2023-11-22 22:11:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-22 22:11:27,960 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-22 22:11:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:27,961 INFO L225 Difference]: With dead ends: 129 [2023-11-22 22:11:27,961 INFO L226 Difference]: Without dead ends: 103 [2023-11-22 22:11:27,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=492, Invalid=3540, Unknown=0, NotChecked=0, Total=4032 [2023-11-22 22:11:27,962 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:27,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 120 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 22:11:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-22 22:11:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2023-11-22 22:11:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 89 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2023-11-22 22:11:28,015 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 27 [2023-11-22 22:11:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:28,015 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2023-11-22 22:11:28,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2023-11-22 22:11:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-22 22:11:28,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:28,016 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:28,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-22 22:11:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-22 22:11:28,226 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:28,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash 5440530, now seen corresponding path program 19 times [2023-11-22 22:11:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:28,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101627280] [2023-11-22 22:11:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:28,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:28,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101627280] [2023-11-22 22:11:28,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101627280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:28,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966896367] [2023-11-22 22:11:28,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:11:28,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:28,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:28,433 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:28,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 22:11:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:28,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 22:11:28,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:28,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:28,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966896367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:28,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:28,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-11-22 22:11:28,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293749235] [2023-11-22 22:11:28,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:28,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-22 22:11:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:28,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-22 22:11:28,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-22 22:11:28,640 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:28,795 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2023-11-22 22:11:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 22:11:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-22 22:11:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:28,796 INFO L225 Difference]: With dead ends: 121 [2023-11-22 22:11:28,796 INFO L226 Difference]: Without dead ends: 109 [2023-11-22 22:11:28,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 20 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:11:28,796 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:28,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-22 22:11:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2023-11-22 22:11:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 97 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2023-11-22 22:11:28,860 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 29 [2023-11-22 22:11:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:28,860 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2023-11-22 22:11:28,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2023-11-22 22:11:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 22:11:28,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:28,861 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:28,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:29,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-22 22:11:29,071 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:29,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:29,071 INFO L85 PathProgramCache]: Analyzing trace with hash 118330498, now seen corresponding path program 20 times [2023-11-22 22:11:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:29,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843784585] [2023-11-22 22:11:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:29,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-22 22:11:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843784585] [2023-11-22 22:11:29,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843784585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:29,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389140720] [2023-11-22 22:11:29,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:11:29,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:29,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:29,242 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:29,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 22:11:29,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:11:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:29,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-22 22:11:29,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:29,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389140720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:29,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:29,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 37 [2023-11-22 22:11:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547774480] [2023-11-22 22:11:29,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 22:11:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 22:11:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 22:11:29,786 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:42,479 INFO L93 Difference]: Finished difference Result 256 states and 305 transitions. [2023-11-22 22:11:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-11-22 22:11:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-22 22:11:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:42,481 INFO L225 Difference]: With dead ends: 256 [2023-11-22 22:11:42,481 INFO L226 Difference]: Without dead ends: 217 [2023-11-22 22:11:42,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7291 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2664, Invalid=22458, Unknown=0, NotChecked=0, Total=25122 [2023-11-22 22:11:42,486 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 643 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:42,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 135 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-22 22:11:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-22 22:11:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 132. [2023-11-22 22:11:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 131 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2023-11-22 22:11:42,603 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 30 [2023-11-22 22:11:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:42,603 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2023-11-22 22:11:42,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2023-11-22 22:11:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 22:11:42,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:42,604 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:42,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:42,815 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:42,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:42,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1676881137, now seen corresponding path program 21 times [2023-11-22 22:11:42,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:42,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453369632] [2023-11-22 22:11:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:42,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:43,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:43,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453369632] [2023-11-22 22:11:43,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453369632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393359410] [2023-11-22 22:11:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:11:43,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:43,045 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:43,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 22:11:43,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 22:11:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:43,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 22:11:43,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:11:43,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:11:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393359410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 41 [2023-11-22 22:11:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257722315] [2023-11-22 22:11:43,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:43,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 22:11:43,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 22:11:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 22:11:43,760 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:46,510 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2023-11-22 22:11:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-22 22:11:46,510 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-22 22:11:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:46,511 INFO L225 Difference]: With dead ends: 199 [2023-11-22 22:11:46,511 INFO L226 Difference]: Without dead ends: 171 [2023-11-22 22:11:46,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1006, Invalid=10550, Unknown=0, NotChecked=0, Total=11556 [2023-11-22 22:11:46,513 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:46,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 185 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 22:11:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-22 22:11:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2023-11-22 22:11:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 151 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2023-11-22 22:11:46,658 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 31 [2023-11-22 22:11:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:46,660 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2023-11-22 22:11:46,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2023-11-22 22:11:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 22:11:46,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:46,684 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:46,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:46,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:46,899 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:46,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2115600766, now seen corresponding path program 22 times [2023-11-22 22:11:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:46,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513398748] [2023-11-22 22:11:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:46,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 22:11:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513398748] [2023-11-22 22:11:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513398748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029724669] [2023-11-22 22:11:47,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:11:47,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:47,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:47,084 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:47,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 22:11:47,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:11:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:47,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-22 22:11:47,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 22:11:47,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 22:11:47,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029724669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:47,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:47,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 12] total 17 [2023-11-22 22:11:47,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652377182] [2023-11-22 22:11:47,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:47,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:11:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:11:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:11:47,431 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:47,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:47,817 INFO L93 Difference]: Finished difference Result 211 states and 240 transitions. [2023-11-22 22:11:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 22:11:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-22 22:11:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:47,818 INFO L225 Difference]: With dead ends: 211 [2023-11-22 22:11:47,818 INFO L226 Difference]: Without dead ends: 198 [2023-11-22 22:11:47,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 22 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:11:47,819 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:47,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 127 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-22 22:11:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 160. [2023-11-22 22:11:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1635220125786163) internal successors, (185), 159 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2023-11-22 22:11:47,937 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 32 [2023-11-22 22:11:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:47,937 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2023-11-22 22:11:47,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2023-11-22 22:11:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 22:11:47,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:47,938 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:47,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:48,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-22 22:11:48,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:48,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2084819519, now seen corresponding path program 23 times [2023-11-22 22:11:48,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:48,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73172914] [2023-11-22 22:11:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 22:11:48,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73172914] [2023-11-22 22:11:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73172914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589313035] [2023-11-22 22:11:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:11:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:48,417 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:48,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 22:11:48,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-22 22:11:48,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:48,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-22 22:11:48,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:11:48,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 22:11:48,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589313035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:48,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:48,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 16] total 43 [2023-11-22 22:11:48,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488839785] [2023-11-22 22:11:48,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:48,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-22 22:11:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:48,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-22 22:11:48,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2023-11-22 22:11:48,974 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:50,390 INFO L93 Difference]: Finished difference Result 318 states and 371 transitions. [2023-11-22 22:11:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-22 22:11:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-22 22:11:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:50,391 INFO L225 Difference]: With dead ends: 318 [2023-11-22 22:11:50,391 INFO L226 Difference]: Without dead ends: 305 [2023-11-22 22:11:50,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1900, Invalid=5582, Unknown=0, NotChecked=0, Total=7482 [2023-11-22 22:11:50,392 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 304 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:50,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 201 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 22:11:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-22 22:11:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 160. [2023-11-22 22:11:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1572327044025157) internal successors, (184), 159 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2023-11-22 22:11:50,518 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 32 [2023-11-22 22:11:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:50,518 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2023-11-22 22:11:50,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2023-11-22 22:11:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 22:11:50,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:50,519 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:50,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:50,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 22:11:50,730 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:50,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:50,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2057068142, now seen corresponding path program 24 times [2023-11-22 22:11:50,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:50,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285582926] [2023-11-22 22:11:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:50,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:11:50,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285582926] [2023-11-22 22:11:50,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285582926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079371048] [2023-11-22 22:11:50,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:11:50,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:50,964 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:50,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 22:11:51,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-22 22:11:51,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:51,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-22 22:11:51,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 22:11:51,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:11:51,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079371048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:51,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:51,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 18 [2023-11-22 22:11:51,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334686742] [2023-11-22 22:11:51,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:11:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:11:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:11:51,307 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:51,806 INFO L93 Difference]: Finished difference Result 245 states and 277 transitions. [2023-11-22 22:11:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 22:11:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-22 22:11:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:51,807 INFO L225 Difference]: With dead ends: 245 [2023-11-22 22:11:51,808 INFO L226 Difference]: Without dead ends: 231 [2023-11-22 22:11:51,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 23 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2023-11-22 22:11:51,808 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:51,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:11:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-22 22:11:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 169. [2023-11-22 22:11:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1547619047619047) internal successors, (194), 168 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 194 transitions. [2023-11-22 22:11:51,961 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 194 transitions. Word has length 35 [2023-11-22 22:11:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:51,962 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 194 transitions. [2023-11-22 22:11:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 194 transitions. [2023-11-22 22:11:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 22:11:51,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:51,962 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:51,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:52,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-22 22:11:52,174 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:52,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:52,174 INFO L85 PathProgramCache]: Analyzing trace with hash 756475298, now seen corresponding path program 25 times [2023-11-22 22:11:52,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:52,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911679697] [2023-11-22 22:11:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:52,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 22:11:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:52,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911679697] [2023-11-22 22:11:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911679697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:52,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222920198] [2023-11-22 22:11:52,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:11:52,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:52,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:52,453 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:52,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 22:11:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:52,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-22 22:11:52,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 22:11:52,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-22 22:11:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222920198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:53,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 18] total 47 [2023-11-22 22:11:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966458932] [2023-11-22 22:11:53,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:53,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-22 22:11:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-22 22:11:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 22:11:53,087 INFO L87 Difference]: Start difference. First operand 169 states and 194 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:11:55,960 INFO L93 Difference]: Finished difference Result 236 states and 276 transitions. [2023-11-22 22:11:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-22 22:11:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-22 22:11:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:11:55,961 INFO L225 Difference]: With dead ends: 236 [2023-11-22 22:11:55,961 INFO L226 Difference]: Without dead ends: 195 [2023-11-22 22:11:55,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1185, Invalid=11697, Unknown=0, NotChecked=0, Total=12882 [2023-11-22 22:11:55,964 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 22:11:55,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 311 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 22:11:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-22 22:11:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 179. [2023-11-22 22:11:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1404494382022472) internal successors, (203), 178 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2023-11-22 22:11:56,103 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 35 [2023-11-22 22:11:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:11:56,104 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2023-11-22 22:11:56,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:11:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2023-11-22 22:11:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 22:11:56,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:11:56,111 INFO L195 NwaCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:11:56,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 22:11:56,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:56,323 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:11:56,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:11:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1203978128, now seen corresponding path program 26 times [2023-11-22 22:11:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:11:56,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279387127] [2023-11-22 22:11:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:11:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:11:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:11:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-22 22:11:56,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:11:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279387127] [2023-11-22 22:11:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279387127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:11:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47227317] [2023-11-22 22:11:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:11:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:11:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:11:56,505 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:11:56,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 22:11:56,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:11:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:11:56,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-22 22:11:56,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:11:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:56,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:11:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:11:57,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47227317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:11:57,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:11:57,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 47 [2023-11-22 22:11:57,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24165765] [2023-11-22 22:11:57,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:11:57,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-22 22:11:57,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:11:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-22 22:11:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1883, Unknown=0, NotChecked=0, Total=2256 [2023-11-22 22:11:57,191 INFO L87 Difference]: Start difference. First operand 179 states and 203 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:12:38,104 INFO L93 Difference]: Finished difference Result 342 states and 395 transitions. [2023-11-22 22:12:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2023-11-22 22:12:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-22 22:12:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:12:38,106 INFO L225 Difference]: With dead ends: 342 [2023-11-22 22:12:38,106 INFO L226 Difference]: Without dead ends: 302 [2023-11-22 22:12:38,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15204 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=5518, Invalid=43544, Unknown=0, NotChecked=0, Total=49062 [2023-11-22 22:12:38,109 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 910 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:12:38,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 104 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-22 22:12:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-22 22:12:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 198. [2023-11-22 22:12:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1725888324873097) internal successors, (231), 197 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 231 transitions. [2023-11-22 22:12:38,287 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 231 transitions. Word has length 36 [2023-11-22 22:12:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:12:38,287 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 231 transitions. [2023-11-22 22:12:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 231 transitions. [2023-11-22 22:12:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 22:12:38,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:12:38,288 INFO L195 NwaCegarLoop]: trace histogram [13, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:12:38,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 22:12:38,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:38,498 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:12:38,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:12:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1848357072, now seen corresponding path program 27 times [2023-11-22 22:12:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:12:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542959373] [2023-11-22 22:12:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:12:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:12:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:12:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:12:38,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:12:38,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542959373] [2023-11-22 22:12:38,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542959373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:12:38,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746133340] [2023-11-22 22:12:38,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:12:38,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:12:38,818 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:12:38,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 22:12:38,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 22:12:38,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:12:38,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 22:12:38,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:12:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-22 22:12:39,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:12:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-22 22:12:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746133340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:12:39,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:12:39,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 49 [2023-11-22 22:12:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697002014] [2023-11-22 22:12:39,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:12:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-22 22:12:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:12:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-22 22:12:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2023, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 22:12:39,767 INFO L87 Difference]: Start difference. First operand 198 states and 231 transitions. Second operand has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:12:44,572 INFO L93 Difference]: Finished difference Result 291 states and 343 transitions. [2023-11-22 22:12:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-11-22 22:12:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-22 22:12:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:12:44,577 INFO L225 Difference]: With dead ends: 291 [2023-11-22 22:12:44,578 INFO L226 Difference]: Without dead ends: 277 [2023-11-22 22:12:44,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6103 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3573, Invalid=19989, Unknown=0, NotChecked=0, Total=23562 [2023-11-22 22:12:44,582 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 829 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 22:12:44,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 303 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 22:12:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-22 22:12:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 197. [2023-11-22 22:12:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1734693877551021) internal successors, (230), 196 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2023-11-22 22:12:44,782 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 36 [2023-11-22 22:12:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:12:44,782 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2023-11-22 22:12:44,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2023-11-22 22:12:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 22:12:44,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:12:44,783 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:12:44,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-22 22:12:44,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:44,994 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:12:44,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:12:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -524046206, now seen corresponding path program 28 times [2023-11-22 22:12:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:12:44,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332209417] [2023-11-22 22:12:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:12:44,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:12:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:12:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:12:45,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:12:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332209417] [2023-11-22 22:12:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332209417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:12:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850841115] [2023-11-22 22:12:45,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:12:45,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:45,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:12:45,235 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:12:45,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 22:12:45,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:12:45,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:12:45,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-22 22:12:45,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:12:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:12:45,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:12:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:12:45,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850841115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:12:45,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:12:45,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2023-11-22 22:12:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646335022] [2023-11-22 22:12:45,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:12:45,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 22:12:45,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:12:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 22:12:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:12:45,556 INFO L87 Difference]: Start difference. First operand 197 states and 230 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:12:45,955 INFO L93 Difference]: Finished difference Result 251 states and 286 transitions. [2023-11-22 22:12:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 22:12:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-22 22:12:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:12:45,956 INFO L225 Difference]: With dead ends: 251 [2023-11-22 22:12:45,956 INFO L226 Difference]: Without dead ends: 236 [2023-11-22 22:12:45,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 26 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-11-22 22:12:45,957 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:12:45,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 173 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:12:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-22 22:12:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2023-11-22 22:12:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.173913043478261) internal successors, (243), 207 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 243 transitions. [2023-11-22 22:12:46,151 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 243 transitions. Word has length 38 [2023-11-22 22:12:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:12:46,151 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 243 transitions. [2023-11-22 22:12:46,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 243 transitions. [2023-11-22 22:12:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 22:12:46,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:12:46,152 INFO L195 NwaCegarLoop]: trace histogram [15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:12:46,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-22 22:12:46,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-22 22:12:46,364 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:12:46,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:12:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash 290600418, now seen corresponding path program 29 times [2023-11-22 22:12:46,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:12:46,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428852734] [2023-11-22 22:12:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:12:46,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:12:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:12:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-22 22:12:46,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:12:46,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428852734] [2023-11-22 22:12:46,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428852734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:12:46,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283096674] [2023-11-22 22:12:46,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:12:46,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:12:46,637 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:12:46,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 22:12:47,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-22 22:12:47,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:12:47,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-22 22:12:47,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:12:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-22 22:12:47,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:12:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-22 22:12:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283096674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:12:47,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:12:47,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 47 [2023-11-22 22:12:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873077713] [2023-11-22 22:12:47,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:12:47,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-22 22:12:47,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:12:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-22 22:12:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 22:12:47,590 INFO L87 Difference]: Start difference. First operand 208 states and 243 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:12:49,890 INFO L93 Difference]: Finished difference Result 390 states and 437 transitions. [2023-11-22 22:12:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-22 22:12:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-22 22:12:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:12:49,892 INFO L225 Difference]: With dead ends: 390 [2023-11-22 22:12:49,892 INFO L226 Difference]: Without dead ends: 360 [2023-11-22 22:12:49,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1366, Invalid=5440, Unknown=0, NotChecked=0, Total=6806 [2023-11-22 22:12:49,893 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 192 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:12:49,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 133 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:12:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-11-22 22:12:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 184. [2023-11-22 22:12:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.180327868852459) internal successors, (216), 183 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2023-11-22 22:12:50,075 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 39 [2023-11-22 22:12:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:12:50,075 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2023-11-22 22:12:50,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2023-11-22 22:12:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 22:12:50,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:12:50,076 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:12:50,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-22 22:12:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:50,281 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:12:50,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:12:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1950981841, now seen corresponding path program 30 times [2023-11-22 22:12:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:12:50,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923715218] [2023-11-22 22:12:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:12:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:12:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:12:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:12:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:12:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923715218] [2023-11-22 22:12:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923715218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:12:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25926131] [2023-11-22 22:12:50,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:12:50,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:12:50,616 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:12:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-22 22:12:50,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-22 22:12:50,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:12:50,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-22 22:12:50,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:12:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:12:50,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:12:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-22 22:12:51,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25926131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:12:51,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:12:51,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 20] total 53 [2023-11-22 22:12:51,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433813780] [2023-11-22 22:12:51,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:12:51,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-22 22:12:51,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:12:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-22 22:12:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 22:12:51,420 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:12:55,555 INFO L93 Difference]: Finished difference Result 261 states and 307 transitions. [2023-11-22 22:12:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-22 22:12:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-22 22:12:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:12:55,558 INFO L225 Difference]: With dead ends: 261 [2023-11-22 22:12:55,558 INFO L226 Difference]: Without dead ends: 213 [2023-11-22 22:12:55,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1605, Invalid=17577, Unknown=0, NotChecked=0, Total=19182 [2023-11-22 22:12:55,560 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 22:12:55,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 277 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 22:12:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-22 22:12:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 194. [2023-11-22 22:12:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.145077720207254) internal successors, (221), 193 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 221 transitions. [2023-11-22 22:12:55,766 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 221 transitions. Word has length 39 [2023-11-22 22:12:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:12:55,766 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 221 transitions. [2023-11-22 22:12:55,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:12:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 221 transitions. [2023-11-22 22:12:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-22 22:12:55,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:12:55,768 INFO L195 NwaCegarLoop]: trace histogram [15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:12:55,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-22 22:12:55,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:55,980 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:12:55,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:12:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash -787033902, now seen corresponding path program 31 times [2023-11-22 22:12:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:12:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821823566] [2023-11-22 22:12:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:12:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:12:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:12:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 60 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-22 22:12:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:12:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821823566] [2023-11-22 22:12:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821823566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:12:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260637449] [2023-11-22 22:12:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:12:56,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:12:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:12:56,205 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:12:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-22 22:12:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:12:56,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-22 22:12:56,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:12:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:12:56,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:12:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:12:57,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260637449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:12:57,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:12:57,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 27] total 53 [2023-11-22 22:12:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11987989] [2023-11-22 22:12:57,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:12:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-22 22:12:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:12:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-22 22:12:57,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 22:12:57,060 INFO L87 Difference]: Start difference. First operand 194 states and 221 transitions. Second operand has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:14:41,665 INFO L93 Difference]: Finished difference Result 459 states and 527 transitions. [2023-11-22 22:14:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2023-11-22 22:14:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-22 22:14:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:14:41,667 INFO L225 Difference]: With dead ends: 459 [2023-11-22 22:14:41,667 INFO L226 Difference]: Without dead ends: 416 [2023-11-22 22:14:41,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30381 ImplicationChecksByTransitivity, 93.5s TimeCoverageRelationStatistics Valid=7910, Invalid=81790, Unknown=0, NotChecked=0, Total=89700 [2023-11-22 22:14:41,671 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1719 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:14:41,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1719 Valid, 193 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-11-22 22:14:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-22 22:14:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 241. [2023-11-22 22:14:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.1875) internal successors, (285), 240 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 285 transitions. [2023-11-22 22:14:41,950 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 285 transitions. Word has length 41 [2023-11-22 22:14:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:14:41,950 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 285 transitions. [2023-11-22 22:14:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 285 transitions. [2023-11-22 22:14:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-22 22:14:41,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:14:41,951 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:14:41,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-22 22:14:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-22 22:14:42,152 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:14:42,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:14:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1497686254, now seen corresponding path program 32 times [2023-11-22 22:14:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:14:42,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588586713] [2023-11-22 22:14:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:14:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:14:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:14:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 22:14:42,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:14:42,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588586713] [2023-11-22 22:14:42,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588586713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:14:42,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970879093] [2023-11-22 22:14:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:14:42,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:14:42,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:14:42,405 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:14:42,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-22 22:14:42,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:14:42,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:14:42,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-22 22:14:42,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:14:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 22:14:42,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:14:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 22:14:42,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970879093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:14:42,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:14:42,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2023-11-22 22:14:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701447267] [2023-11-22 22:14:42,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:14:42,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 22:14:42,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:14:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 22:14:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2023-11-22 22:14:42,717 INFO L87 Difference]: Start difference. First operand 241 states and 285 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:14:43,233 INFO L93 Difference]: Finished difference Result 288 states and 333 transitions. [2023-11-22 22:14:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:14:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-22 22:14:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:14:43,234 INFO L225 Difference]: With dead ends: 288 [2023-11-22 22:14:43,234 INFO L226 Difference]: Without dead ends: 272 [2023-11-22 22:14:43,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 27 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:14:43,235 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:14:43,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 186 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:14:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-22 22:14:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2023-11-22 22:14:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.1832669322709164) internal successors, (297), 251 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 297 transitions. [2023-11-22 22:14:43,523 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 297 transitions. Word has length 41 [2023-11-22 22:14:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:14:43,523 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 297 transitions. [2023-11-22 22:14:43,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 297 transitions. [2023-11-22 22:14:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-22 22:14:43,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:14:43,524 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:14:43,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-22 22:14:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-22 22:14:43,735 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:14:43,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:14:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash 127726209, now seen corresponding path program 33 times [2023-11-22 22:14:43,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:14:43,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861560784] [2023-11-22 22:14:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:14:43,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:14:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:14:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:14:44,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:14:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861560784] [2023-11-22 22:14:44,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861560784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:14:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377000213] [2023-11-22 22:14:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:14:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:14:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:14:44,147 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:14:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-22 22:14:44,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-22 22:14:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:14:44,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-22 22:14:44,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:14:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-22 22:14:44,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:14:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-22 22:14:45,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377000213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:14:45,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:14:45,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 58 [2023-11-22 22:14:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711430443] [2023-11-22 22:14:45,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:14:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-22 22:14:45,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:14:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-22 22:14:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3051, Unknown=0, NotChecked=0, Total=3306 [2023-11-22 22:14:45,439 INFO L87 Difference]: Start difference. First operand 252 states and 297 transitions. Second operand has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:14:54,717 INFO L93 Difference]: Finished difference Result 349 states and 425 transitions. [2023-11-22 22:14:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-11-22 22:14:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-22 22:14:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:14:54,718 INFO L225 Difference]: With dead ends: 349 [2023-11-22 22:14:54,719 INFO L226 Difference]: Without dead ends: 299 [2023-11-22 22:14:54,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9480 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2497, Invalid=34945, Unknown=0, NotChecked=0, Total=37442 [2023-11-22 22:14:54,721 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 168 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 4727 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-22 22:14:54,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 562 Invalid, 4949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4727 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-22 22:14:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-22 22:14:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 280. [2023-11-22 22:14:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.146953405017921) internal successors, (320), 279 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 320 transitions. [2023-11-22 22:14:55,039 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 320 transitions. Word has length 42 [2023-11-22 22:14:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:14:55,040 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 320 transitions. [2023-11-22 22:14:55,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:14:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 320 transitions. [2023-11-22 22:14:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-22 22:14:55,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:14:55,041 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:14:55,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-22 22:14:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-22 22:14:55,252 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:14:55,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:14:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash 476393137, now seen corresponding path program 34 times [2023-11-22 22:14:55,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:14:55,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979370718] [2023-11-22 22:14:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:14:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:14:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:14:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 22:14:55,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:14:55,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979370718] [2023-11-22 22:14:55,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979370718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:14:55,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071544065] [2023-11-22 22:14:55,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:14:55,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:14:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:14:55,650 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:14:55,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-22 22:14:55,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:14:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:14:55,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-22 22:14:55,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:14:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:14:55,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:14:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-22 22:14:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071544065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:14:56,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:14:56,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 22] total 60 [2023-11-22 22:14:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374573244] [2023-11-22 22:14:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:14:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-22 22:14:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:14:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-22 22:14:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=2850, Unknown=0, NotChecked=0, Total=3540 [2023-11-22 22:14:56,569 INFO L87 Difference]: Start difference. First operand 280 states and 320 transitions. Second operand has 60 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:01,281 INFO L93 Difference]: Finished difference Result 579 states and 660 transitions. [2023-11-22 22:15:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2023-11-22 22:15:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-22 22:15:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:01,283 INFO L225 Difference]: With dead ends: 579 [2023-11-22 22:15:01,283 INFO L226 Difference]: Without dead ends: 563 [2023-11-22 22:15:01,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7940 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5797, Invalid=16853, Unknown=0, NotChecked=0, Total=22650 [2023-11-22 22:15:01,285 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 718 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:01,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 331 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 22:15:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-11-22 22:15:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 278. [2023-11-22 22:15:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.144404332129964) internal successors, (317), 277 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 317 transitions. [2023-11-22 22:15:01,632 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 317 transitions. Word has length 43 [2023-11-22 22:15:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:01,632 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 317 transitions. [2023-11-22 22:15:01,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 317 transitions. [2023-11-22 22:15:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-22 22:15:01,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:01,633 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:01,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-22 22:15:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-22 22:15:01,845 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:01,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1453309310, now seen corresponding path program 35 times [2023-11-22 22:15:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:01,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137212022] [2023-11-22 22:15:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-22 22:15:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137212022] [2023-11-22 22:15:02,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137212022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:02,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659714695] [2023-11-22 22:15:02,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:15:02,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:02,208 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:02,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-22 22:15:02,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-22 22:15:02,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:15:02,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-22 22:15:02,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-22 22:15:02,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-22 22:15:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659714695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:03,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:03,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2023-11-22 22:15:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394251129] [2023-11-22 22:15:03,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:03,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:15:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:15:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:15:03,098 INFO L87 Difference]: Start difference. First operand 278 states and 317 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:03,788 INFO L93 Difference]: Finished difference Result 339 states and 379 transitions. [2023-11-22 22:15:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 22:15:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-22 22:15:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:03,789 INFO L225 Difference]: With dead ends: 339 [2023-11-22 22:15:03,789 INFO L226 Difference]: Without dead ends: 322 [2023-11-22 22:15:03,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 30 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:15:03,790 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:03,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 199 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:15:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-22 22:15:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 290. [2023-11-22 22:15:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.1418685121107266) internal successors, (330), 289 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 330 transitions. [2023-11-22 22:15:04,194 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 330 transitions. Word has length 44 [2023-11-22 22:15:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:04,194 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 330 transitions. [2023-11-22 22:15:04,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 330 transitions. [2023-11-22 22:15:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-22 22:15:04,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:04,195 INFO L195 NwaCegarLoop]: trace histogram [17, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:04,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-22 22:15:04,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-22 22:15:04,400 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:04,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1676538768, now seen corresponding path program 36 times [2023-11-22 22:15:04,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:04,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833897133] [2023-11-22 22:15:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:04,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 22:15:04,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833897133] [2023-11-22 22:15:04,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833897133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057469950] [2023-11-22 22:15:04,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:15:04,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:04,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:04,825 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:04,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-22 22:15:04,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-22 22:15:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:15:04,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-22 22:15:04,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 22:15:05,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-22 22:15:05,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057469950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:05,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:05,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 24] total 64 [2023-11-22 22:15:05,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681665653] [2023-11-22 22:15:05,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:05,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-22 22:15:05,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:05,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-22 22:15:05,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3601, Unknown=0, NotChecked=0, Total=4032 [2023-11-22 22:15:05,831 INFO L87 Difference]: Start difference. First operand 290 states and 330 transitions. Second operand has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:15,219 INFO L93 Difference]: Finished difference Result 390 states and 450 transitions. [2023-11-22 22:15:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-11-22 22:15:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-22 22:15:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:15,221 INFO L225 Difference]: With dead ends: 390 [2023-11-22 22:15:15,221 INFO L226 Difference]: Without dead ends: 324 [2023-11-22 22:15:15,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10203 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2654, Invalid=34018, Unknown=0, NotChecked=0, Total=36672 [2023-11-22 22:15:15,222 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 180 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 3933 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 3933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:15,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 449 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 3933 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 22:15:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-22 22:15:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 303. [2023-11-22 22:15:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.1225165562913908) internal successors, (339), 302 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 339 transitions. [2023-11-22 22:15:15,612 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 339 transitions. Word has length 46 [2023-11-22 22:15:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:15,612 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 339 transitions. [2023-11-22 22:15:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 339 transitions. [2023-11-22 22:15:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-22 22:15:15,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:15,613 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:15,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-22 22:15:15,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-22 22:15:15,817 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:15,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1770685294, now seen corresponding path program 37 times [2023-11-22 22:15:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306719095] [2023-11-22 22:15:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-22 22:15:16,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306719095] [2023-11-22 22:15:16,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306719095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812486186] [2023-11-22 22:15:16,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:15:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:16,139 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:16,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-22 22:15:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:16,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-22 22:15:16,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-22 22:15:16,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-22 22:15:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812486186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:16,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:16,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2023-11-22 22:15:16,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906041366] [2023-11-22 22:15:16,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:16,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:15:16,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:15:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:15:16,524 INFO L87 Difference]: Start difference. First operand 303 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:17,216 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2023-11-22 22:15:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 22:15:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-22 22:15:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:17,218 INFO L225 Difference]: With dead ends: 349 [2023-11-22 22:15:17,218 INFO L226 Difference]: Without dead ends: 331 [2023-11-22 22:15:17,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 32 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:15:17,219 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:17,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 227 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:15:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-22 22:15:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 315. [2023-11-22 22:15:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.1210191082802548) internal successors, (352), 314 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 352 transitions. [2023-11-22 22:15:17,633 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 352 transitions. Word has length 47 [2023-11-22 22:15:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:17,633 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 352 transitions. [2023-11-22 22:15:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 352 transitions. [2023-11-22 22:15:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-22 22:15:17,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:17,647 INFO L195 NwaCegarLoop]: trace histogram [18, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:17,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-22 22:15:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-22 22:15:17,857 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:17,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -267141342, now seen corresponding path program 38 times [2023-11-22 22:15:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267858511] [2023-11-22 22:15:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-22 22:15:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267858511] [2023-11-22 22:15:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267858511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312635252] [2023-11-22 22:15:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:15:18,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:18,341 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:18,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-22 22:15:18,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:15:18,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:15:18,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-22 22:15:18,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:15:18,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-22 22:15:19,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312635252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:19,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 24] total 66 [2023-11-22 22:15:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329535675] [2023-11-22 22:15:19,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-22 22:15:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-22 22:15:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2023-11-22 22:15:19,245 INFO L87 Difference]: Start difference. First operand 315 states and 352 transitions. Second operand has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:26,214 INFO L93 Difference]: Finished difference Result 786 states and 888 transitions. [2023-11-22 22:15:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-11-22 22:15:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-22 22:15:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:26,224 INFO L225 Difference]: With dead ends: 786 [2023-11-22 22:15:26,224 INFO L226 Difference]: Without dead ends: 736 [2023-11-22 22:15:26,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13572 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8737, Invalid=26795, Unknown=0, NotChecked=0, Total=35532 [2023-11-22 22:15:26,230 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 843 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 3504 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:26,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 502 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3504 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 22:15:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2023-11-22 22:15:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 289. [2023-11-22 22:15:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.1215277777777777) internal successors, (323), 288 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 323 transitions. [2023-11-22 22:15:26,681 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 323 transitions. Word has length 47 [2023-11-22 22:15:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:26,681 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 323 transitions. [2023-11-22 22:15:26,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 323 transitions. [2023-11-22 22:15:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-22 22:15:26,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:26,682 INFO L195 NwaCegarLoop]: trace histogram [20, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:26,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-22 22:15:26,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-22 22:15:26,893 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:26,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1591510352, now seen corresponding path program 39 times [2023-11-22 22:15:26,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:26,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66060697] [2023-11-22 22:15:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 132 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-22 22:15:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66060697] [2023-11-22 22:15:27,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66060697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004886717] [2023-11-22 22:15:27,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:15:27,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:27,252 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-22 22:15:27,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-22 22:15:27,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:15:27,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-22 22:15:27,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 132 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-22 22:15:27,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 132 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-22 22:15:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004886717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:28,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 62 [2023-11-22 22:15:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207175360] [2023-11-22 22:15:28,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:28,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-22 22:15:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-22 22:15:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2023-11-22 22:15:28,437 INFO L87 Difference]: Start difference. First operand 289 states and 323 transitions. Second operand has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:35,855 INFO L93 Difference]: Finished difference Result 620 states and 673 transitions. [2023-11-22 22:15:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-11-22 22:15:35,855 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-22 22:15:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:35,857 INFO L225 Difference]: With dead ends: 620 [2023-11-22 22:15:35,857 INFO L226 Difference]: Without dead ends: 582 [2023-11-22 22:15:35,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3228, Invalid=13028, Unknown=0, NotChecked=0, Total=16256 [2023-11-22 22:15:35,858 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 321 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:35,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 210 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 22:15:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-22 22:15:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 257. [2023-11-22 22:15:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.125) internal successors, (288), 256 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2023-11-22 22:15:36,232 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 50 [2023-11-22 22:15:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:36,232 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2023-11-22 22:15:36,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2023-11-22 22:15:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-22 22:15:36,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:36,233 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:36,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-22 22:15:36,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:36,438 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:36,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2122304382, now seen corresponding path program 40 times [2023-11-22 22:15:36,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:36,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794482872] [2023-11-22 22:15:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:36,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-22 22:15:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794482872] [2023-11-22 22:15:36,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794482872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078860868] [2023-11-22 22:15:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:15:36,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:36,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:36,756 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:36,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-22 22:15:36,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:15:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:15:36,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-22 22:15:36,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-22 22:15:36,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-22 22:15:37,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078860868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:37,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:37,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 19 [2023-11-22 22:15:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429749133] [2023-11-22 22:15:37,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:37,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:15:37,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:15:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:15:37,150 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:15:38,061 INFO L93 Difference]: Finished difference Result 339 states and 371 transitions. [2023-11-22 22:15:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 22:15:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-22 22:15:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:15:38,062 INFO L225 Difference]: With dead ends: 339 [2023-11-22 22:15:38,062 INFO L226 Difference]: Without dead ends: 320 [2023-11-22 22:15:38,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 79 SyntacticMatches, 34 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2023-11-22 22:15:38,063 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:15:38,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 229 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:15:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-22 22:15:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 271. [2023-11-22 22:15:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1222222222222222) internal successors, (303), 270 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 303 transitions. [2023-11-22 22:15:38,484 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 303 transitions. Word has length 50 [2023-11-22 22:15:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:15:38,484 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 303 transitions. [2023-11-22 22:15:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:15:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 303 transitions. [2023-11-22 22:15:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-22 22:15:38,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:15:38,503 INFO L195 NwaCegarLoop]: trace histogram [19, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:15:38,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-22 22:15:38,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:38,703 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:15:38,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:15:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1896129247, now seen corresponding path program 41 times [2023-11-22 22:15:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:15:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237997323] [2023-11-22 22:15:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:15:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:15:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:15:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-22 22:15:39,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:15:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237997323] [2023-11-22 22:15:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237997323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:15:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861666900] [2023-11-22 22:15:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:15:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:15:39,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:15:39,157 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:15:39,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-22 22:15:39,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-22 22:15:39,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:15:39,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-22 22:15:39,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:15:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-22 22:15:40,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:15:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-22 22:15:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861666900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:15:41,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:15:41,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 26] total 70 [2023-11-22 22:15:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555451155] [2023-11-22 22:15:41,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:15:41,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-22 22:15:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:15:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-22 22:15:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2023-11-22 22:15:41,128 INFO L87 Difference]: Start difference. First operand 271 states and 303 transitions. Second operand has 70 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15