./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-crafted/bAnd1.i --full-output --preprocessor.use.memory.slicer false --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/array-crafted/bAnd1.i -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 ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:09:06,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:09:06,889 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:09:06,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:09:06,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:09:06,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:09:06,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:09:06,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:09:06,924 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:09:06,927 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:09:06,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:09:06,928 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:09:06,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:09:06,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:09:06,929 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:09:06,930 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:09:06,930 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:09:06,930 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:09:06,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:09:06,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:09:06,931 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:09:06,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:09:06,932 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:09:06,932 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:09:06,932 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:09:06,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:09:06,933 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:09:06,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:09:06,933 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:09:06,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:09:06,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:09:06,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:09:06,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:09:06,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:09:06,935 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:09:06,935 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:09:06,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:09:06,936 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:09:06,936 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:09:06,936 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:09:06,936 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:09:06,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:09:06,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:09:07,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:09:07,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:09:07,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:09:07,143 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:09:07,144 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:09:07,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd1.i [2023-11-22 21:09:08,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:09:08,265 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:09:08,266 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i [2023-11-22 21:09:08,270 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3a574f0b/8122cda12b554226abfe500552393ad7/FLAG2142155c6 [2023-11-22 21:09:08,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3a574f0b/8122cda12b554226abfe500552393ad7 [2023-11-22 21:09:08,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:09:08,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:09:08,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:09:08,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:09:08,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:09:08,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ac7243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08, skipping insertion in model container [2023-11-22 21:09:08,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:09:08,463 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i[1290,1303] [2023-11-22 21:09:08,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:09:08,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:09:08,485 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i[1290,1303] [2023-11-22 21:09:08,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:09:08,495 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:09:08,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08 WrapperNode [2023-11-22 21:09:08,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:09:08,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:09:08,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:09:08,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:09:08,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,517 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-11-22 21:09:08,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:09:08,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:09:08,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:09:08,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:09:08,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,535 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:09:08,536 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:09:08,536 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:09:08,536 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:09:08,537 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (1/1) ... [2023-11-22 21:09:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:09:08,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:08,561 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 21:09:08,569 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 21:09:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:09:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:09:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:09:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:09:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-11-22 21:09:08,602 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-11-22 21:09:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:09:08,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:09:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:09:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:09:08,651 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:09:08,653 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:09:08,804 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:09:08,849 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:09:08,851 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 21:09:08,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:09:08 BoogieIcfgContainer [2023-11-22 21:09:08,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:09:08,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:09:08,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:09:08,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:09:08,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:09:08" (1/3) ... [2023-11-22 21:09:08,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559618da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:09:08, skipping insertion in model container [2023-11-22 21:09:08,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:08" (2/3) ... [2023-11-22 21:09:08,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559618da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:09:08, skipping insertion in model container [2023-11-22 21:09:08,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:09:08" (3/3) ... [2023-11-22 21:09:08,860 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2023-11-22 21:09:08,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:09:08,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:09:08,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:09:08,917 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;@f2657fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:09:08,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:09:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 21:09:08,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:08,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:08,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:08,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1143770574, now seen corresponding path program 1 times [2023-11-22 21:09:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:08,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112702845] [2023-11-22 21:09:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:08,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-22 21:09:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-22 21:09:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:09:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:09:09,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:09,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112702845] [2023-11-22 21:09:09,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112702845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:09,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62288549] [2023-11-22 21:09:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:09,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:09,215 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 21:09:09,232 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 21:09:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:09:09,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:09:09,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:09:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62288549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:09:09,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:09:09,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-22 21:09:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375339740] [2023-11-22 21:09:09,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:09:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:09:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:09:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:09,335 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 21:09:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:09,361 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2023-11-22 21:09:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:09:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-22 21:09:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:09,370 INFO L225 Difference]: With dead ends: 45 [2023-11-22 21:09:09,371 INFO L226 Difference]: Without dead ends: 22 [2023-11-22 21:09:09,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:09,381 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:09,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-22 21:09:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-22 21:09:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-22 21:09:09,411 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 25 [2023-11-22 21:09:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:09,411 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-22 21:09:09,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 21:09:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-22 21:09:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 21:09:09,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:09,413 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:09,424 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 21:09:09,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-22 21:09:09,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:09,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1668871841, now seen corresponding path program 1 times [2023-11-22 21:09:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444343639] [2023-11-22 21:09:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:09:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:09:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-22 21:09:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:09:09,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444343639] [2023-11-22 21:09:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444343639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035441052] [2023-11-22 21:09:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:09,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:09,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:09,803 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 21:09:09,833 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 21:09:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:09,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:09:09,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-22 21:09:09,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:09:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035441052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:09:09,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:09:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-22 21:09:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637982795] [2023-11-22 21:09:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:09:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:09:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:09:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:09,885 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:09,907 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2023-11-22 21:09:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:09:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-22 21:09:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:09,908 INFO L225 Difference]: With dead ends: 43 [2023-11-22 21:09:09,909 INFO L226 Difference]: Without dead ends: 26 [2023-11-22 21:09:09,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:09,912 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:09,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-22 21:09:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-22 21:09:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-22 21:09:09,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 26 [2023-11-22 21:09:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:09,924 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-22 21:09:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-22 21:09:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 21:09:09,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:09,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:09,941 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 21:09:10,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-22 21:09:10,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:10,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash 220189929, now seen corresponding path program 1 times [2023-11-22 21:09:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:10,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137963760] [2023-11-22 21:09:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:10,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:09:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:09:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 21:09:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137963760] [2023-11-22 21:09:10,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137963760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112382111] [2023-11-22 21:09:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:10,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:10,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:10,238 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 21:09:10,258 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 21:09:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:09:10,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 21:09:10,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:09:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112382111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:09:10,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:09:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-22 21:09:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509473079] [2023-11-22 21:09:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:09:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:09:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:09:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:09:10,305 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:10,317 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-11-22 21:09:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:09:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-22 21:09:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:10,318 INFO L225 Difference]: With dead ends: 38 [2023-11-22 21:09:10,318 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 21:09:10,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:09:10,319 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 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 21:09:10,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 21:09:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 21:09:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-22 21:09:10,322 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 35 [2023-11-22 21:09:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:10,323 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-22 21:09:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-22 21:09:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 21:09:10,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:10,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:10,335 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 21:09:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:10,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:10,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -727189650, now seen corresponding path program 1 times [2023-11-22 21:09:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631845925] [2023-11-22 21:09:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:09:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 21:09:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 21:09:10,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:10,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631845925] [2023-11-22 21:09:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631845925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985148602] [2023-11-22 21:09:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:10,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:10,636 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 21:09:10,649 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 21:09:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:10,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:09:10,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-22 21:09:10,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-22 21:09:10,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985148602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:10,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:10,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-22 21:09:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042838767] [2023-11-22 21:09:10,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:10,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 21:09:10,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:10,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 21:09:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:09:10,774 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:10,818 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-11-22 21:09:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 21:09:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-11-22 21:09:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:10,820 INFO L225 Difference]: With dead ends: 55 [2023-11-22 21:09:10,820 INFO L226 Difference]: Without dead ends: 34 [2023-11-22 21:09:10,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:09:10,823 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:10,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-22 21:09:10,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-11-22 21:09:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-22 21:09:10,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 36 [2023-11-22 21:09:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:10,838 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-22 21:09:10,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-22 21:09:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-22 21:09:10,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:10,841 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:10,856 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 21:09:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:11,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:11,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1910194571, now seen corresponding path program 2 times [2023-11-22 21:09:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415960200] [2023-11-22 21:09:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:09:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-22 21:09:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 21:09:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-22 21:09:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415960200] [2023-11-22 21:09:11,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415960200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015580219] [2023-11-22 21:09:11,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:09:11,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:11,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:11,136 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 21:09:11,159 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 21:09:11,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:09:11,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:11,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:09:11,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:09:11,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:09:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015580219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:11,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:11,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-22 21:09:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565433059] [2023-11-22 21:09:11,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 21:09:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 21:09:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:09:11,306 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-22 21:09:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:11,332 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2023-11-22 21:09:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 21:09:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-11-22 21:09:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:11,333 INFO L225 Difference]: With dead ends: 63 [2023-11-22 21:09:11,333 INFO L226 Difference]: Without dead ends: 38 [2023-11-22 21:09:11,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:09:11,334 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:11,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-22 21:09:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-22 21:09:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-11-22 21:09:11,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2023-11-22 21:09:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:11,339 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-11-22 21:09:11,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-22 21:09:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-11-22 21:09:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-22 21:09:11,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:11,340 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:11,360 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 21:09:11,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:11,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:11,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1702488334, now seen corresponding path program 3 times [2023-11-22 21:09:11,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:11,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421843163] [2023-11-22 21:09:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 21:09:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-22 21:09:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:09:11,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:11,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421843163] [2023-11-22 21:09:11,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421843163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:11,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949770797] [2023-11-22 21:09:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:09:11,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:11,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:11,640 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 21:09:11,663 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 21:09:11,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 21:09:11,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:11,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 21:09:11,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:09:11,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-22 21:09:11,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949770797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:11,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:11,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-22 21:09:11,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150775329] [2023-11-22 21:09:11,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:11,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 21:09:11,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:11,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 21:09:11,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:09:11,775 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:11,806 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-11-22 21:09:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:09:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-11-22 21:09:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:11,807 INFO L225 Difference]: With dead ends: 73 [2023-11-22 21:09:11,807 INFO L226 Difference]: Without dead ends: 49 [2023-11-22 21:09:11,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:09:11,808 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:11,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-22 21:09:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-11-22 21:09:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-11-22 21:09:11,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 55 [2023-11-22 21:09:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:11,812 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-11-22 21:09:11,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-11-22 21:09:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-22 21:09:11,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:11,813 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:11,830 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 21:09:12,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:12,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:12,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:12,029 INFO L85 PathProgramCache]: Analyzing trace with hash 247386870, now seen corresponding path program 4 times [2023-11-22 21:09:12,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:12,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269672012] [2023-11-22 21:09:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:12,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:09:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-22 21:09:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-22 21:09:12,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:12,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269672012] [2023-11-22 21:09:12,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269672012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:12,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020015936] [2023-11-22 21:09:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:09:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:12,276 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 21:09:12,304 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 21:09:12,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:09:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:12,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 21:09:12,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-22 21:09:12,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-22 21:09:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020015936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:12,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:12,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-11-22 21:09:12,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990762445] [2023-11-22 21:09:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:12,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:09:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:09:12,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:09:12,501 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:12,559 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-11-22 21:09:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 21:09:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-11-22 21:09:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:12,562 INFO L225 Difference]: With dead ends: 101 [2023-11-22 21:09:12,562 INFO L226 Difference]: Without dead ends: 67 [2023-11-22 21:09:12,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:09:12,565 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:12,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-22 21:09:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-22 21:09:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-11-22 21:09:12,579 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 68 [2023-11-22 21:09:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:12,579 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-11-22 21:09:12,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-11-22 21:09:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-22 21:09:12,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:12,585 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:12,600 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 21:09:12,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:12,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:12,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash 782687711, now seen corresponding path program 5 times [2023-11-22 21:09:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483600451] [2023-11-22 21:09:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:12,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:13,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:09:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-22 21:09:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:13,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-22 21:09:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-11-22 21:09:13,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483600451] [2023-11-22 21:09:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483600451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401912112] [2023-11-22 21:09:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:09:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:13,031 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 21:09:13,056 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 21:09:13,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-22 21:09:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:13,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 21:09:13,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-22 21:09:13,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-22 21:09:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401912112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:13,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:13,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-11-22 21:09:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518963033] [2023-11-22 21:09:13,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-22 21:09:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-22 21:09:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-22 21:09:13,781 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:13,875 INFO L93 Difference]: Finished difference Result 162 states and 235 transitions. [2023-11-22 21:09:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 21:09:13,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-11-22 21:09:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:13,876 INFO L225 Difference]: With dead ends: 162 [2023-11-22 21:09:13,876 INFO L226 Difference]: Without dead ends: 108 [2023-11-22 21:09:13,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-22 21:09:13,877 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:13,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 251 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-22 21:09:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-22 21:09:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2023-11-22 21:09:13,883 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 114 [2023-11-22 21:09:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:13,883 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2023-11-22 21:09:13,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2023-11-22 21:09:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-22 21:09:13,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:13,885 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:13,899 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 21:09:14,097 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,SelfDestructingSolverStorable7 [2023-11-22 21:09:14,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:14,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2082430674, now seen corresponding path program 6 times [2023-11-22 21:09:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003198889] [2023-11-22 21:09:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:14,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:14,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-22 21:09:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:14,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-22 21:09:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-11-22 21:09:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-11-22 21:09:14,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003198889] [2023-11-22 21:09:14,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003198889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343586398] [2023-11-22 21:09:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:09:14,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:14,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:14,504 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 21:09:14,506 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 21:09:14,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-22 21:09:14,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:14,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 21:09:14,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-11-22 21:09:14,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-11-22 21:09:14,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343586398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:14,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:14,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-11-22 21:09:14,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010252183] [2023-11-22 21:09:14,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:14,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 21:09:14,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 21:09:14,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:09:14,889 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:14,934 INFO L93 Difference]: Finished difference Result 211 states and 299 transitions. [2023-11-22 21:09:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-22 21:09:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2023-11-22 21:09:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:14,935 INFO L225 Difference]: With dead ends: 211 [2023-11-22 21:09:14,935 INFO L226 Difference]: Without dead ends: 117 [2023-11-22 21:09:14,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:09:14,936 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:14,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-22 21:09:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-22 21:09:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 112 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-11-22 21:09:14,941 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 205 [2023-11-22 21:09:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:14,941 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-11-22 21:09:14,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-11-22 21:09:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-22 21:09:14,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:14,943 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:14,958 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 21:09:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:15,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:15,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1810196225, now seen corresponding path program 7 times [2023-11-22 21:09:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:15,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694367963] [2023-11-22 21:09:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:09:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-22 21:09:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-11-22 21:09:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694367963] [2023-11-22 21:09:15,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694367963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971477979] [2023-11-22 21:09:15,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:09:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:15,544 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 21:09:15,552 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 21:09:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 21:09:15,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:15,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:15,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971477979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:15,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:15,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-11-22 21:09:15,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962287271] [2023-11-22 21:09:15,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:15,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 21:09:15,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:15,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 21:09:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-22 21:09:15,991 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:16,025 INFO L93 Difference]: Finished difference Result 234 states and 328 transitions. [2023-11-22 21:09:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 21:09:16,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2023-11-22 21:09:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:16,027 INFO L225 Difference]: With dead ends: 234 [2023-11-22 21:09:16,027 INFO L226 Difference]: Without dead ends: 132 [2023-11-22 21:09:16,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-22 21:09:16,028 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:16,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-22 21:09:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-22 21:09:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 127 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-11-22 21:09:16,041 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 214 [2023-11-22 21:09:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:16,041 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-11-22 21:09:16,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-11-22 21:09:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-22 21:09:16,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:16,043 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:16,059 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 21:09:16,252 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,SelfDestructingSolverStorable9 [2023-11-22 21:09:16,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:16,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1342335058, now seen corresponding path program 8 times [2023-11-22 21:09:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774397507] [2023-11-22 21:09:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:09:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 21:09:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-22 21:09:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774397507] [2023-11-22 21:09:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774397507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28445998] [2023-11-22 21:09:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:09:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:17,121 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 21:09:17,144 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 21:09:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:09:17,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:17,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 21:09:17,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:17,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28445998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:18,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-11-22 21:09:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559301531] [2023-11-22 21:09:18,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:18,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-22 21:09:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-22 21:09:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 21:09:18,220 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:18,274 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-11-22 21:09:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-22 21:09:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2023-11-22 21:09:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:18,275 INFO L225 Difference]: With dead ends: 264 [2023-11-22 21:09:18,275 INFO L226 Difference]: Without dead ends: 162 [2023-11-22 21:09:18,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 21:09:18,277 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:18,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-22 21:09:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-22 21:09:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-11-22 21:09:18,281 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 229 [2023-11-22 21:09:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:18,281 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-11-22 21:09:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-11-22 21:09:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-22 21:09:18,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:18,283 INFO L195 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:18,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:18,488 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,SelfDestructingSolverStorable10 [2023-11-22 21:09:18,488 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:18,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1392892750, now seen corresponding path program 9 times [2023-11-22 21:09:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797322267] [2023-11-22 21:09:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-22 21:09:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-22 21:09:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-11-22 21:09:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:20,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:20,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797322267] [2023-11-22 21:09:20,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797322267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:20,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272836252] [2023-11-22 21:09:20,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:09:20,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:20,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:20,856 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 21:09:20,883 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 21:09:21,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-22 21:09:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:21,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 21:09:21,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-11-22 21:09:22,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-11-22 21:09:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272836252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:22,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-11-22 21:09:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317182597] [2023-11-22 21:09:22,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:22,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-22 21:09:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-22 21:09:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-22 21:09:22,561 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:22,656 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2023-11-22 21:09:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-22 21:09:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2023-11-22 21:09:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:22,658 INFO L225 Difference]: With dead ends: 281 [2023-11-22 21:09:22,658 INFO L226 Difference]: Without dead ends: 179 [2023-11-22 21:09:22,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-22 21:09:22,661 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:22,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-22 21:09:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-22 21:09:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2241379310344827) internal successors, (213), 174 states have internal predecessors, (213), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2023-11-22 21:09:22,666 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 259 [2023-11-22 21:09:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:22,666 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2023-11-22 21:09:22,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2023-11-22 21:09:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-22 21:09:22,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:22,669 INFO L195 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:22,684 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 21:09:22,885 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,SelfDestructingSolverStorable11 [2023-11-22 21:09:22,886 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 384793247, now seen corresponding path program 10 times [2023-11-22 21:09:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730483066] [2023-11-22 21:09:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-22 21:09:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-22 21:09:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-11-22 21:09:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-22 21:09:25,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730483066] [2023-11-22 21:09:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730483066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79346448] [2023-11-22 21:09:25,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:09:25,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:25,120 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 21:09:25,147 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 21:09:25,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:09:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:25,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 21:09:25,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-22 21:09:25,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-22 21:09:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79346448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:26,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-11-22 21:09:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540803447] [2023-11-22 21:09:26,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:26,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-22 21:09:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-22 21:09:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-22 21:09:26,824 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:27,005 INFO L93 Difference]: Finished difference Result 378 states and 521 transitions. [2023-11-22 21:09:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-22 21:09:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2023-11-22 21:09:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:27,007 INFO L225 Difference]: With dead ends: 378 [2023-11-22 21:09:27,007 INFO L226 Difference]: Without dead ends: 260 [2023-11-22 21:09:27,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-22 21:09:27,010 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 442 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:27,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 256 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-22 21:09:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-22 21:09:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.3098039215686275) internal successors, (334), 255 states have internal predecessors, (334), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 340 transitions. [2023-11-22 21:09:27,017 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 340 transitions. Word has length 276 [2023-11-22 21:09:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:27,018 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 340 transitions. [2023-11-22 21:09:27,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 340 transitions. [2023-11-22 21:09:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-22 21:09:27,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:27,022 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:27,037 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 21:09:27,235 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,SelfDestructingSolverStorable12 [2023-11-22 21:09:27,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:27,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash 43549266, now seen corresponding path program 11 times [2023-11-22 21:09:27,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:27,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77206456] [2023-11-22 21:09:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:27,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:09:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-11-22 21:09:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-11-22 21:09:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-11-22 21:09:29,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77206456] [2023-11-22 21:09:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77206456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147586578] [2023-11-22 21:09:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:09:29,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:29,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:29,744 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 21:09:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15