./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:59:50,773 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:59:50,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:59:50,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:59:50,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:59:50,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:59:50,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:59:50,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:59:50,890 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:59:50,890 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:59:50,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:59:50,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:59:50,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:59:50,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:59:50,895 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:59:50,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:59:50,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:59:50,896 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:59:50,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:59:50,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:59:50,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:59:50,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:59:50,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:59:50,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:59:50,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:59:50,902 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:59:50,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:59:50,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:59:50,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:59:50,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:59:50,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:59:50,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:59:50,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:59:50,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:59:50,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:59:50,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:59:50,906 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:59:50,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:59:50,906 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:59:50,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:59:50,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:59:50,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:59:50,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 [2024-10-12 18:59:51,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:59:51,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:59:51,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:59:51,213 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:59:51,213 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:59:51,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-10-12 18:59:52,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:59:52,789 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:59:52,790 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-10-12 18:59:52,796 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0342de04/938f89dfda8c4917a8fb794749d072a4/FLAG337c8df1c [2024-10-12 18:59:52,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0342de04/938f89dfda8c4917a8fb794749d072a4 [2024-10-12 18:59:52,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:59:52,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:59:52,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:59:52,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:59:52,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:59:52,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:59:52" (1/1) ... [2024-10-12 18:59:52,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a00d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:52, skipping insertion in model container [2024-10-12 18:59:52,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:59:52" (1/1) ... [2024-10-12 18:59:52,835 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:59:53,011 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-10-12 18:59:53,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:59:53,047 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:59:53,060 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-10-12 18:59:53,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:59:53,086 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:59:53,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53 WrapperNode [2024-10-12 18:59:53,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:59:53,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:59:53,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:59:53,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:59:53,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,125 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-10-12 18:59:53,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:59:53,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:59:53,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:59:53,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:59:53,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,146 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,169 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-12 18:59:53,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,184 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:59:53,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:59:53,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:59:53,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:59:53,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (1/1) ... [2024-10-12 18:59:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:59:53,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:59:53,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 18:59:53,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 18:59:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:59:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:59:53,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:59:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:59:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:59:53,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:59:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:59:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:59:53,331 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:59:53,333 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:59:53,469 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 18:59:53,469 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:59:53,517 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:59:53,517 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:59:53,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:59:53 BoogieIcfgContainer [2024-10-12 18:59:53,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:59:53,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:59:53,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:59:53,525 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:59:53,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:59:52" (1/3) ... [2024-10-12 18:59:53,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be5d82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:59:53, skipping insertion in model container [2024-10-12 18:59:53,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:59:53" (2/3) ... [2024-10-12 18:59:53,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be5d82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:59:53, skipping insertion in model container [2024-10-12 18:59:53,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:59:53" (3/3) ... [2024-10-12 18:59:53,531 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2024-10-12 18:59:53,545 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:59:53,545 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:59:53,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:59:53,597 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@cf5ce6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:59:53,597 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:59:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 18:59:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:59:53,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:53,606 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:53,606 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:53,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:53,611 INFO L85 PathProgramCache]: Analyzing trace with hash 760957734, now seen corresponding path program 1 times [2024-10-12 18:59:53,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:53,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074976955] [2024-10-12 18:59:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:53,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:59:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:53,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:59:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:53,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:59:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 18:59:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:53,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074976955] [2024-10-12 18:59:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074976955] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:59:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:59:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:59:53,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106416275] [2024-10-12 18:59:53,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:59:53,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:59:53,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:53,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:59:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:59:53,870 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:59:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:53,905 INFO L93 Difference]: Finished difference Result 58 states and 99 transitions. [2024-10-12 18:59:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:59:53,908 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-12 18:59:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:53,915 INFO L225 Difference]: With dead ends: 58 [2024-10-12 18:59:53,915 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 18:59:53,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:59:53,925 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:53,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:59:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 18:59:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-12 18:59:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 18:59:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-10-12 18:59:53,972 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2024-10-12 18:59:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:53,974 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-10-12 18:59:53,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:59:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-10-12 18:59:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:59:53,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:53,976 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:53,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:59:53,977 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:53,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash -387749596, now seen corresponding path program 1 times [2024-10-12 18:59:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:53,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269772278] [2024-10-12 18:59:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:59:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:59:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:59:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 18:59:54,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:54,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269772278] [2024-10-12 18:59:54,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269772278] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:59:54,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:59:54,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:59:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085736822] [2024-10-12 18:59:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:59:54,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:59:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:59:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:59:54,253 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 18:59:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:54,325 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-10-12 18:59:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:59:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-12 18:59:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:54,328 INFO L225 Difference]: With dead ends: 41 [2024-10-12 18:59:54,328 INFO L226 Difference]: Without dead ends: 39 [2024-10-12 18:59:54,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:59:54,330 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:54,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 119 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:59:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-12 18:59:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2024-10-12 18:59:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 18:59:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-12 18:59:54,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2024-10-12 18:59:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:54,344 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-12 18:59:54,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 18:59:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-12 18:59:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 18:59:54,346 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:54,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:54,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:59:54,347 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:54,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:54,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1391236353, now seen corresponding path program 1 times [2024-10-12 18:59:54,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:54,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794405174] [2024-10-12 18:59:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:59:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:59:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:59:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 18:59:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 18:59:54,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:54,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794405174] [2024-10-12 18:59:54,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794405174] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:59:54,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:59:54,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:59:54,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100936672] [2024-10-12 18:59:54,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:59:54,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:59:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:59:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:59:54,566 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:59:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:54,645 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-10-12 18:59:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:59:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-10-12 18:59:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:54,647 INFO L225 Difference]: With dead ends: 45 [2024-10-12 18:59:54,647 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 18:59:54,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:59:54,649 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:54,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:59:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 18:59:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-10-12 18:59:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 18:59:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-10-12 18:59:54,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2024-10-12 18:59:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:54,659 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-10-12 18:59:54,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:59:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-10-12 18:59:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 18:59:54,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:54,661 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:54,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 18:59:54,661 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:54,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 831418820, now seen corresponding path program 1 times [2024-10-12 18:59:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600423393] [2024-10-12 18:59:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:59:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102252208] [2024-10-12 18:59:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:59:54,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:59:54,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:59:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:54,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:59:54,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:59:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 18:59:54,876 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:59:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600423393] [2024-10-12 18:59:54,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:59:54,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102252208] [2024-10-12 18:59:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102252208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:59:54,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:59:54,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:59:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752988255] [2024-10-12 18:59:54,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:59:54,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:59:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:59:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:59:54,882 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 18:59:54,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:54,967 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-10-12 18:59:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:59:54,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-10-12 18:59:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:54,969 INFO L225 Difference]: With dead ends: 62 [2024-10-12 18:59:54,969 INFO L226 Difference]: Without dead ends: 49 [2024-10-12 18:59:54,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:59:54,970 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:54,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:59:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-12 18:59:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-12 18:59:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-12 18:59:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-10-12 18:59:54,984 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 33 [2024-10-12 18:59:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:54,985 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-10-12 18:59:54,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 18:59:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-10-12 18:59:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 18:59:54,986 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:54,986 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:55,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:59:55,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:55,187 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:55,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1016562388, now seen corresponding path program 1 times [2024-10-12 18:59:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:55,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334472269] [2024-10-12 18:59:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:59:55,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010935597] [2024-10-12 18:59:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:55,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:55,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:59:55,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:59:55,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:59:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:55,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 18:59:55,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:59:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 18:59:55,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:59:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 18:59:55,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334472269] [2024-10-12 18:59:55,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:59:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010935597] [2024-10-12 18:59:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010935597] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:59:55,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:59:55,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-12 18:59:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656779335] [2024-10-12 18:59:55,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:59:55,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:59:55,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:59:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:59:55,663 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-12 18:59:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:55,825 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2024-10-12 18:59:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 18:59:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 40 [2024-10-12 18:59:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:55,828 INFO L225 Difference]: With dead ends: 64 [2024-10-12 18:59:55,829 INFO L226 Difference]: Without dead ends: 62 [2024-10-12 18:59:55,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-12 18:59:55,830 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:55,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 161 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:59:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-12 18:59:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2024-10-12 18:59:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-12 18:59:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2024-10-12 18:59:55,853 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 40 [2024-10-12 18:59:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:55,853 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2024-10-12 18:59:55,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-12 18:59:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2024-10-12 18:59:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-12 18:59:55,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:55,854 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:55,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:59:56,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:56,055 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:56,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1147651331, now seen corresponding path program 1 times [2024-10-12 18:59:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:56,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213940498] [2024-10-12 18:59:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:59:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787536283] [2024-10-12 18:59:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:56,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:59:56,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:59:56,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:59:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 18:59:56,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:59:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-12 18:59:56,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:59:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-12 18:59:56,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213940498] [2024-10-12 18:59:56,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:59:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787536283] [2024-10-12 18:59:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787536283] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 18:59:56,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:59:56,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-12 18:59:56,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100265354] [2024-10-12 18:59:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:59:56,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:59:56,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:59:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:59:56,356 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 18:59:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:56,452 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2024-10-12 18:59:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:59:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2024-10-12 18:59:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:56,454 INFO L225 Difference]: With dead ends: 69 [2024-10-12 18:59:56,455 INFO L226 Difference]: Without dead ends: 67 [2024-10-12 18:59:56,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:59:56,456 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:56,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:59:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-12 18:59:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-12 18:59:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-12 18:59:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2024-10-12 18:59:56,483 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 50 [2024-10-12 18:59:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:56,484 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2024-10-12 18:59:56,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 18:59:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2024-10-12 18:59:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-12 18:59:56,487 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:56,487 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:56,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 18:59:56,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:56,692 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:56,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash 73871321, now seen corresponding path program 1 times [2024-10-12 18:59:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:56,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867665483] [2024-10-12 18:59:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:59:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:59:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:59:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 18:59:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 18:59:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 18:59:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 18:59:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 18:59:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-12 18:59:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-12 18:59:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867665483] [2024-10-12 18:59:56,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867665483] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:59:56,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:59:56,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:59:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473668186] [2024-10-12 18:59:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:59:56,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:59:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:59:56,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:59:56,897 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-12 18:59:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:59:56,961 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2024-10-12 18:59:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:59:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2024-10-12 18:59:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:59:56,963 INFO L225 Difference]: With dead ends: 74 [2024-10-12 18:59:56,963 INFO L226 Difference]: Without dead ends: 62 [2024-10-12 18:59:56,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:59:56,964 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:59:56,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:59:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-12 18:59:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-12 18:59:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-12 18:59:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-10-12 18:59:56,987 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 56 [2024-10-12 18:59:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:59:56,990 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-10-12 18:59:56,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-12 18:59:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-10-12 18:59:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-12 18:59:56,993 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:59:56,993 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:59:56,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-12 18:59:56,993 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:59:56,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:59:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1282123871, now seen corresponding path program 1 times [2024-10-12 18:59:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:59:56,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598551885] [2024-10-12 18:59:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:59:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:59:57,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134702129] [2024-10-12 18:59:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:59:57,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:59:57,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:59:57,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:59:57,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:59:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:59:57,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-12 18:59:57,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:59:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-10-12 18:59:57,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:59:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-12 18:59:59,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:59:59,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598551885] [2024-10-12 18:59:59,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:59:59,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134702129] [2024-10-12 18:59:59,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134702129] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:59:59,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:59:59,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-10-12 18:59:59,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732757763] [2024-10-12 18:59:59,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:59:59,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 18:59:59,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:59:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 18:59:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-12 18:59:59,604 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-12 19:00:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:01,073 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2024-10-12 19:00:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 19:00:01,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 70 [2024-10-12 19:00:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:01,077 INFO L225 Difference]: With dead ends: 149 [2024-10-12 19:00:01,079 INFO L226 Difference]: Without dead ends: 126 [2024-10-12 19:00:01,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-10-12 19:00:01,081 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:01,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 262 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-12 19:00:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-12 19:00:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2024-10-12 19:00:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2024-10-12 19:00:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2024-10-12 19:00:01,130 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 70 [2024-10-12 19:00:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:01,130 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2024-10-12 19:00:01,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-12 19:00:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2024-10-12 19:00:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-12 19:00:01,132 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:01,132 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:01,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 19:00:01,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:01,333 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:01,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1411586487, now seen corresponding path program 1 times [2024-10-12 19:00:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:01,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460292933] [2024-10-12 19:00:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:01,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:00:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674389460] [2024-10-12 19:00:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:01,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:01,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 19:00:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:01,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-12 19:00:01,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-10-12 19:00:01,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-12 19:00:02,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460292933] [2024-10-12 19:00:02,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:00:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674389460] [2024-10-12 19:00:02,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674389460] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:02,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:00:02,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-10-12 19:00:02,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217914820] [2024-10-12 19:00:02,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:02,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 19:00:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 19:00:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-10-12 19:00:02,656 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-10-12 19:00:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:03,173 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2024-10-12 19:00:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 19:00:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 81 [2024-10-12 19:00:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:03,175 INFO L225 Difference]: With dead ends: 141 [2024-10-12 19:00:03,175 INFO L226 Difference]: Without dead ends: 107 [2024-10-12 19:00:03,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-10-12 19:00:03,176 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:03,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 346 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 19:00:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-12 19:00:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2024-10-12 19:00:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-12 19:00:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2024-10-12 19:00:03,211 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 81 [2024-10-12 19:00:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:03,212 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2024-10-12 19:00:03,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-10-12 19:00:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2024-10-12 19:00:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-12 19:00:03,214 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:03,214 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:03,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 19:00:03,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:03,419 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:03,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash -302279341, now seen corresponding path program 2 times [2024-10-12 19:00:03,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:03,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646624894] [2024-10-12 19:00:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:00:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 19:00:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 19:00:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 19:00:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 19:00:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 19:00:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 19:00:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 19:00:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 19:00:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 19:00:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-12 19:00:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-12 19:00:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-12 19:00:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-12 19:00:03,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:03,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646624894] [2024-10-12 19:00:03,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646624894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:00:03,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543603043] [2024-10-12 19:00:03,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:00:03,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:03,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 19:00:03,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:00:03,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:00:03,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 19:00:03,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-12 19:00:03,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-12 19:00:03,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543603043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:03,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:00:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-10-12 19:00:03,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690399819] [2024-10-12 19:00:03,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:03,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:00:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:00:03,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:00:03,823 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-12 19:00:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:03,884 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2024-10-12 19:00:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 19:00:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 83 [2024-10-12 19:00:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:03,886 INFO L225 Difference]: With dead ends: 120 [2024-10-12 19:00:03,886 INFO L226 Difference]: Without dead ends: 98 [2024-10-12 19:00:03,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:00:03,887 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:03,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:00:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-12 19:00:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-10-12 19:00:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-12 19:00:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2024-10-12 19:00:03,923 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 83 [2024-10-12 19:00:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:03,923 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2024-10-12 19:00:03,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-12 19:00:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2024-10-12 19:00:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-12 19:00:03,924 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:03,925 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:03,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 19:00:04,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:04,126 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:04,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1047816948, now seen corresponding path program 1 times [2024-10-12 19:00:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:04,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934293969] [2024-10-12 19:00:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:00:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 19:00:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 19:00:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 19:00:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 19:00:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 19:00:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 19:00:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 19:00:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 19:00:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 19:00:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-12 19:00:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-12 19:00:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-12 19:00:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-12 19:00:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-10-12 19:00:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934293969] [2024-10-12 19:00:04,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934293969] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:00:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842010332] [2024-10-12 19:00:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:04,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:04,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 19:00:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:04,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 19:00:04,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-10-12 19:00:04,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-10-12 19:00:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842010332] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:05,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:00:05,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-10-12 19:00:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070075384] [2024-10-12 19:00:05,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:05,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 19:00:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 19:00:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-12 19:00:05,158 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-12 19:00:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:05,430 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2024-10-12 19:00:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 19:00:05,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 86 [2024-10-12 19:00:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:05,432 INFO L225 Difference]: With dead ends: 113 [2024-10-12 19:00:05,432 INFO L226 Difference]: Without dead ends: 96 [2024-10-12 19:00:05,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-10-12 19:00:05,433 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:05,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 319 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:00:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-12 19:00:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2024-10-12 19:00:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-12 19:00:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-10-12 19:00:05,454 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 86 [2024-10-12 19:00:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:05,455 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-10-12 19:00:05,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-12 19:00:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-10-12 19:00:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-12 19:00:05,456 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:05,456 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:05,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 19:00:05,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:05,661 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:05,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1271237959, now seen corresponding path program 1 times [2024-10-12 19:00:05,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:05,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211912535] [2024-10-12 19:00:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:05,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:00:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 19:00:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 19:00:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 19:00:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 19:00:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 19:00:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 19:00:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 19:00:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 19:00:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 19:00:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-12 19:00:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 19:00:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-12 19:00:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-12 19:00:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-12 19:00:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-12 19:00:05,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211912535] [2024-10-12 19:00:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211912535] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:00:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322217975] [2024-10-12 19:00:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:05,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:05,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:05,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:05,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 19:00:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:05,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 19:00:05,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-10-12 19:00:05,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:00:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322217975] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:00:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:00:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-10-12 19:00:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626424470] [2024-10-12 19:00:05,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:00:05,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:00:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:00:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:00:05,882 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-12 19:00:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:05,943 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2024-10-12 19:00:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:00:05,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 90 [2024-10-12 19:00:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:05,945 INFO L225 Difference]: With dead ends: 96 [2024-10-12 19:00:05,945 INFO L226 Difference]: Without dead ends: 84 [2024-10-12 19:00:05,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:00:05,945 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:05,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:00:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-12 19:00:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-12 19:00:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-12 19:00:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-10-12 19:00:05,965 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 90 [2024-10-12 19:00:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:05,965 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-10-12 19:00:05,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-12 19:00:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-10-12 19:00:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-12 19:00:05,966 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:05,966 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:05,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 19:00:06,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-12 19:00:06,167 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:06,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1209712204, now seen corresponding path program 3 times [2024-10-12 19:00:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539019977] [2024-10-12 19:00:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:00:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565255252] [2024-10-12 19:00:06,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 19:00:06,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:06,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:06,200 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 19:00:06,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 19:00:06,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:00:06,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 19:00:06,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-10-12 19:00:06,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-10-12 19:00:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:19,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539019977] [2024-10-12 19:00:19,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:00:19,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565255252] [2024-10-12 19:00:19,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565255252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:19,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:00:19,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-12 19:00:19,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596640110] [2024-10-12 19:00:19,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:19,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 19:00:19,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:19,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 19:00:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-12 19:00:19,099 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-12 19:00:23,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 19:00:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:23,995 INFO L93 Difference]: Finished difference Result 164 states and 217 transitions. [2024-10-12 19:00:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 19:00:23,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) Word has length 100 [2024-10-12 19:00:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:23,997 INFO L225 Difference]: With dead ends: 164 [2024-10-12 19:00:23,997 INFO L226 Difference]: Without dead ends: 142 [2024-10-12 19:00:23,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-10-12 19:00:23,998 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 67 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:23,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 412 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-12 19:00:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-10-12 19:00:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2024-10-12 19:00:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 76 states have (on average 1.144736842105263) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-12 19:00:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2024-10-12 19:00:24,036 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 100 [2024-10-12 19:00:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:24,036 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2024-10-12 19:00:24,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-12 19:00:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2024-10-12 19:00:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-12 19:00:24,037 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:24,037 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:24,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 19:00:24,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 19:00:24,238 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:24,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:24,239 INFO L85 PathProgramCache]: Analyzing trace with hash 924515754, now seen corresponding path program 2 times [2024-10-12 19:00:24,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:24,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37038477] [2024-10-12 19:00:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:24,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:00:24,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617434790] [2024-10-12 19:00:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:00:24,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:24,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:24,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 19:00:24,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:00:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:00:24,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-12 19:00:24,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-10-12 19:00:24,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-12 19:00:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37038477] [2024-10-12 19:00:24,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:00:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617434790] [2024-10-12 19:00:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617434790] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:24,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:00:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-10-12 19:00:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665277168] [2024-10-12 19:00:24,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:24,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 19:00:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 19:00:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-10-12 19:00:24,699 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-12 19:00:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:25,291 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2024-10-12 19:00:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 19:00:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 111 [2024-10-12 19:00:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:25,293 INFO L225 Difference]: With dead ends: 143 [2024-10-12 19:00:25,293 INFO L226 Difference]: Without dead ends: 141 [2024-10-12 19:00:25,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-10-12 19:00:25,294 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:25,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 207 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 19:00:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-12 19:00:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-10-12 19:00:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.127906976744186) internal successors, (97), 90 states have internal predecessors, (97), 38 states have call successors, (38), 16 states have call predecessors, (38), 16 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2024-10-12 19:00:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2024-10-12 19:00:25,353 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 111 [2024-10-12 19:00:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:25,353 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2024-10-12 19:00:25,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-12 19:00:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2024-10-12 19:00:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-12 19:00:25,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:25,356 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:25,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 19:00:25,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-12 19:00:25,557 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:25,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash -225818490, now seen corresponding path program 4 times [2024-10-12 19:00:25,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103415688] [2024-10-12 19:00:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:25,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:00:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 19:00:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 19:00:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 19:00:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 19:00:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 19:00:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 19:00:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 19:00:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 19:00:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 19:00:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-12 19:00:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 19:00:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-12 19:00:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-12 19:00:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-12 19:00:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-10-12 19:00:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-12 19:00:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-10-12 19:00:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-12 19:00:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103415688] [2024-10-12 19:00:25,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103415688] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:00:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785118225] [2024-10-12 19:00:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 19:00:25,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:25,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:25,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 19:00:25,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 19:00:25,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:00:25,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 19:00:25,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-12 19:00:25,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-10-12 19:00:26,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785118225] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:26,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:00:26,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-10-12 19:00:26,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297094970] [2024-10-12 19:00:26,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:26,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 19:00:26,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 19:00:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-12 19:00:26,213 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2024-10-12 19:00:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:26,318 INFO L93 Difference]: Finished difference Result 173 states and 214 transitions. [2024-10-12 19:00:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:00:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 113 [2024-10-12 19:00:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:26,320 INFO L225 Difference]: With dead ends: 173 [2024-10-12 19:00:26,320 INFO L226 Difference]: Without dead ends: 145 [2024-10-12 19:00:26,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-12 19:00:26,321 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:26,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 214 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:00:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-10-12 19:00:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2024-10-12 19:00:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 92 states have internal predecessors, (98), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2024-10-12 19:00:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2024-10-12 19:00:26,361 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 113 [2024-10-12 19:00:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:26,362 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2024-10-12 19:00:26,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2024-10-12 19:00:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2024-10-12 19:00:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-10-12 19:00:26,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:26,363 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:26,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-12 19:00:26,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-12 19:00:26,564 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:26,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 464728313, now seen corresponding path program 2 times [2024-10-12 19:00:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:26,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322787671] [2024-10-12 19:00:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:00:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 19:00:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 19:00:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 19:00:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 19:00:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 19:00:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 19:00:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 19:00:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 19:00:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-12 19:00:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-12 19:00:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 19:00:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-12 19:00:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-12 19:00:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-12 19:00:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-10-12 19:00:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-12 19:00:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-10-12 19:00:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-10-12 19:00:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:00:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-10-12 19:00:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:00:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322787671] [2024-10-12 19:00:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322787671] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:00:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339991783] [2024-10-12 19:00:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:00:26,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:26,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:26,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 19:00:27,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:00:27,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:00:27,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-12 19:00:27,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-10-12 19:00:27,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-10-12 19:00:28,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339991783] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:00:28,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:00:28,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-10-12 19:00:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969510430] [2024-10-12 19:00:28,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:00:28,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 19:00:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:00:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 19:00:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-10-12 19:00:28,625 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-10-12 19:00:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:00:29,271 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2024-10-12 19:00:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 19:00:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) Word has length 116 [2024-10-12 19:00:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:00:29,273 INFO L225 Difference]: With dead ends: 160 [2024-10-12 19:00:29,273 INFO L226 Difference]: Without dead ends: 132 [2024-10-12 19:00:29,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 19:00:29,275 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:00:29,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 406 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 19:00:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-12 19:00:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2024-10-12 19:00:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 82 states have internal predecessors, (87), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-12 19:00:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-10-12 19:00:29,309 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 116 [2024-10-12 19:00:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:00:29,309 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-10-12 19:00:29,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-10-12 19:00:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-10-12 19:00:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-10-12 19:00:29,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:00:29,311 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:00:29,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-12 19:00:29,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-12 19:00:29,516 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:00:29,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:00:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1038207041, now seen corresponding path program 5 times [2024-10-12 19:00:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:00:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560672552] [2024-10-12 19:00:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:00:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:00:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:00:29,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152395512] [2024-10-12 19:00:29,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 19:00:29,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:00:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:00:29,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:00:29,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 19:00:29,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-12 19:00:29,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:00:29,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-12 19:00:29,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:00:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 90 proven. 132 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2024-10-12 19:00:30,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:00:56,039 WARN L286 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 119 DAG size of output: 114 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)