./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/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:00:09,680 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:00:09,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:00:09,740 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:00:09,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:00:09,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:00:09,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:00:09,756 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:00:09,756 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:00:09,757 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:00:09,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:00:09,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:00:09,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:00:09,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:00:09,758 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:00:09,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:00:09,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:00:09,760 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:00:09,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:00:09,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:00:09,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:00:09,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:00:09,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:00:09,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:00:09,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:00:09,765 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:00:09,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:00:09,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:00:09,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:00:09,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:00:09,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:00:09,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:00:09,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:00:09,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:00:09,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:00:09,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:00:09,768 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2024-10-11 02:00:10,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:00:10,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:00:10,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:00:10,040 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:00:10,041 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:00:10,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-10-11 02:00:11,326 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:00:11,490 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:00:11,490 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-10-11 02:00:11,511 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/31bcea22a/d8c4b6eaf61647ccac60b9f91ccbffc9/FLAGe95097b1b [2024-10-11 02:00:11,886 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/31bcea22a/d8c4b6eaf61647ccac60b9f91ccbffc9 [2024-10-11 02:00:11,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:00:11,889 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:00:11,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:00:11,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:00:11,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:00:11,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:00:11" (1/1) ... [2024-10-11 02:00:11,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719aeac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:11, skipping insertion in model container [2024-10-11 02:00:11,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:00:11" (1/1) ... [2024-10-11 02:00:11,914 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:00:12,056 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/egcd2-ll.c[490,503] [2024-10-11 02:00:12,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:00:12,092 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:00:12,103 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/egcd2-ll.c[490,503] [2024-10-11 02:00:12,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:00:12,129 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:00:12,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12 WrapperNode [2024-10-11 02:00:12,131 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:00:12,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:00:12,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:00:12,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:00:12,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,161 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2024-10-11 02:00:12,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:00:12,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:00:12,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:00:12,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:00:12,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,181 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]. [2024-10-11 02:00:12,184 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:00:12,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:00:12,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:00:12,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:00:12,194 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (1/1) ... [2024-10-11 02:00:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:00:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:12,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:00:12,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:00:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:00:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 02:00:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 02:00:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:00:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:00:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:00:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:00:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:00:12,312 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:00:12,314 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:00:12,445 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-11 02:00:12,445 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:00:12,464 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:00:12,465 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 02:00:12,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:00:12 BoogieIcfgContainer [2024-10-11 02:00:12,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:00:12,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:00:12,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:00:12,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:00:12,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:00:11" (1/3) ... [2024-10-11 02:00:12,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2c477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:00:12, skipping insertion in model container [2024-10-11 02:00:12,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:12" (2/3) ... [2024-10-11 02:00:12,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2c477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:00:12, skipping insertion in model container [2024-10-11 02:00:12,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:00:12" (3/3) ... [2024-10-11 02:00:12,471 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-10-11 02:00:12,484 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:00:12,484 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:00:12,525 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:00:12,531 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;@3e33f529, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:00:12,532 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:00:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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) [2024-10-11 02:00:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 02:00:12,540 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:12,540 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:12,541 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:12,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash 883046315, now seen corresponding path program 1 times [2024-10-11 02:00:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759925471] [2024-10-11 02:00:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:12,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:12,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:12,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:12,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:00:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:00:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:12,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759925471] [2024-10-11 02:00:12,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759925471] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:12,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:12,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:00:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432651372] [2024-10-11 02:00:12,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:12,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:00:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:00:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:00:12,772 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:00:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:12,801 INFO L93 Difference]: Finished difference Result 56 states and 95 transitions. [2024-10-11 02:00:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:00:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-10-11 02:00:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:12,813 INFO L225 Difference]: With dead ends: 56 [2024-10-11 02:00:12,813 INFO L226 Difference]: Without dead ends: 27 [2024-10-11 02:00:12,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:00:12,821 INFO L432 NwaCegarLoop]: 36 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, 36 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 [2024-10-11 02:00:12,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-11 02:00:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-11 02:00:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 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) [2024-10-11 02:00:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-11 02:00:12,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 27 [2024-10-11 02:00:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:12,856 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-11 02:00:12,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:00:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-11 02:00:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 02:00:12,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:12,858 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:12,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:00:12,858 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:12,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:12,859 INFO L85 PathProgramCache]: Analyzing trace with hash -296693581, now seen corresponding path program 1 times [2024-10-11 02:00:12,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:12,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907202493] [2024-10-11 02:00:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:12,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:00:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 02:00:13,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:13,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907202493] [2024-10-11 02:00:13,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907202493] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:13,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066734450] [2024-10-11 02:00:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:13,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:13,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:13,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:13,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:00:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:00:13,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:00:13,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066734450] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:13,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:13,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-11 02:00:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168498366] [2024-10-11 02:00:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:13,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:00:13,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:00:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:00:13,390 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 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) [2024-10-11 02:00:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:13,485 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-10-11 02:00:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:00:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 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 [2024-10-11 02:00:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:13,487 INFO L225 Difference]: With dead ends: 44 [2024-10-11 02:00:13,488 INFO L226 Difference]: Without dead ends: 42 [2024-10-11 02:00:13,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:00:13,490 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:13,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-11 02:00:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-10-11 02:00:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-11 02:00:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2024-10-11 02:00:13,504 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 28 [2024-10-11 02:00:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:13,505 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2024-10-11 02:00:13,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 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) [2024-10-11 02:00:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2024-10-11 02:00:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 02:00:13,506 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:13,506 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:13,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 02:00:13,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:13,707 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:13,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash -603309185, now seen corresponding path program 1 times [2024-10-11 02:00:13,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:13,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120605290] [2024-10-11 02:00:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:13,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529697679] [2024-10-11 02:00:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:13,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:13,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:13,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:00:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:13,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:00:13,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:00:13,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120605290] [2024-10-11 02:00:13,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:13,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529697679] [2024-10-11 02:00:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529697679] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:13,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398712402] [2024-10-11 02:00:13,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:13,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:13,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:13,841 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-11 02:00:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:13,886 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2024-10-11 02:00:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-10-11 02:00:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:13,889 INFO L225 Difference]: With dead ends: 59 [2024-10-11 02:00:13,889 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 02:00:13,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:13,890 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:13,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 02:00:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2024-10-11 02:00:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 30 states have internal predecessors, (31), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-11 02:00:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-10-11 02:00:13,907 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 29 [2024-10-11 02:00:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:13,907 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-10-11 02:00:13,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-11 02:00:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-10-11 02:00:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 02:00:13,908 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:13,908 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:13,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 02:00:14,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:14,109 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:14,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1153692469, now seen corresponding path program 1 times [2024-10-11 02:00:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379336484] [2024-10-11 02:00:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:14,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:00:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-11 02:00:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 02:00:14,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379336484] [2024-10-11 02:00:14,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379336484] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093810164] [2024-10-11 02:00:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:14,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:00:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:00:14,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:00:14,391 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093810164] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:14,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:14,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-10-11 02:00:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305869135] [2024-10-11 02:00:14,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:14,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:00:14,393 INFO L87 Difference]: Start difference. First operand 48 states and 64 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) [2024-10-11 02:00:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:14,459 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-10-11 02:00:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:14,459 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 [2024-10-11 02:00:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:14,461 INFO L225 Difference]: With dead ends: 56 [2024-10-11 02:00:14,462 INFO L226 Difference]: Without dead ends: 52 [2024-10-11 02:00:14,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:00:14,463 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:14,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-11 02:00:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-10-11 02:00:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:00:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-10-11 02:00:14,476 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 33 [2024-10-11 02:00:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:14,477 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-10-11 02:00:14,477 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) [2024-10-11 02:00:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-10-11 02:00:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-11 02:00:14,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:14,478 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:14,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:14,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:14,683 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:14,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash 626438719, now seen corresponding path program 1 times [2024-10-11 02:00:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:14,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421585366] [2024-10-11 02:00:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635701990] [2024-10-11 02:00:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:14,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:14,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:14,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:00:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:14,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:00:14,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 02:00:14,873 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:14,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421585366] [2024-10-11 02:00:14,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:14,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635701990] [2024-10-11 02:00:14,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635701990] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:14,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848578346] [2024-10-11 02:00:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:14,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:14,876 INFO L87 Difference]: Start difference. First operand 51 states and 64 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-11 02:00:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:14,967 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-10-11 02:00:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:14,967 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-10-11 02:00:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:14,968 INFO L225 Difference]: With dead ends: 58 [2024-10-11 02:00:14,969 INFO L226 Difference]: Without dead ends: 56 [2024-10-11 02:00:14,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:14,969 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 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 [2024-10-11 02:00:14,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-11 02:00:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-11 02:00:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:00:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-10-11 02:00:14,982 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 44 [2024-10-11 02:00:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:14,983 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-10-11 02:00:14,983 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-11 02:00:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-10-11 02:00:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 02:00:14,986 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:14,986 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:14,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 02:00:15,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:15,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:15,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1696967842, now seen corresponding path program 1 times [2024-10-11 02:00:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014928334] [2024-10-11 02:00:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484541191] [2024-10-11 02:00:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:15,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:15,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:15,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:00:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 02:00:15,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-11 02:00:15,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-11 02:00:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014928334] [2024-10-11 02:00:15,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:15,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484541191] [2024-10-11 02:00:15,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484541191] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:15,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:15,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-10-11 02:00:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693615171] [2024-10-11 02:00:15,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:15,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:00:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:00:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:00:15,422 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-11 02:00:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:15,509 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-10-11 02:00:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:00:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-10-11 02:00:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:15,510 INFO L225 Difference]: With dead ends: 83 [2024-10-11 02:00:15,510 INFO L226 Difference]: Without dead ends: 81 [2024-10-11 02:00:15,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:00:15,511 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:15,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-11 02:00:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2024-10-11 02:00:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-11 02:00:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-10-11 02:00:15,523 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 51 [2024-10-11 02:00:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:15,523 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-10-11 02:00:15,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-11 02:00:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-10-11 02:00:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-11 02:00:15,524 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:15,524 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:15,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:00:15,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:15,729 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:15,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1106872408, now seen corresponding path program 1 times [2024-10-11 02:00:15,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:15,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539768567] [2024-10-11 02:00:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:15,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:00:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-11 02:00:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-11 02:00:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-11 02:00:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-11 02:00:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 02:00:15,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539768567] [2024-10-11 02:00:15,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539768567] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700990500] [2024-10-11 02:00:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:15,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:15,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:00:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:15,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:00:15,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 02:00:15,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 02:00:16,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700990500] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:16,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:00:16,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-11 02:00:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977281920] [2024-10-11 02:00:16,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:16,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:00:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:16,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:00:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:00:16,038 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-11 02:00:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:16,162 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2024-10-11 02:00:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 02:00:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2024-10-11 02:00:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:16,163 INFO L225 Difference]: With dead ends: 98 [2024-10-11 02:00:16,163 INFO L226 Difference]: Without dead ends: 90 [2024-10-11 02:00:16,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:00:16,165 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:16,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 265 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-11 02:00:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-10-11 02:00:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-10-11 02:00:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2024-10-11 02:00:16,185 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 53 [2024-10-11 02:00:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:16,185 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2024-10-11 02:00:16,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-11 02:00:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2024-10-11 02:00:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 02:00:16,186 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:16,186 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:16,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:00:16,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 02:00:16,387 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:16,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 355794356, now seen corresponding path program 1 times [2024-10-11 02:00:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778803210] [2024-10-11 02:00:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602196246] [2024-10-11 02:00:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:16,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:16,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:16,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:00:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:16,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 02:00:16,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-10-11 02:00:16,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-11 02:00:17,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778803210] [2024-10-11 02:00:17,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602196246] [2024-10-11 02:00:17,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602196246] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:17,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:17,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2024-10-11 02:00:17,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949660531] [2024-10-11 02:00:17,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:17,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:00:17,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:00:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:00:17,268 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-10-11 02:00:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:17,851 INFO L93 Difference]: Finished difference Result 109 states and 152 transitions. [2024-10-11 02:00:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 02:00:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 59 [2024-10-11 02:00:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:17,853 INFO L225 Difference]: With dead ends: 109 [2024-10-11 02:00:17,854 INFO L226 Difference]: Without dead ends: 106 [2024-10-11 02:00:17,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-10-11 02:00:17,856 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:17,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 251 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:00:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-11 02:00:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-10-11 02:00:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-11 02:00:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2024-10-11 02:00:17,891 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 59 [2024-10-11 02:00:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:17,891 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2024-10-11 02:00:17,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-10-11 02:00:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2024-10-11 02:00:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-11 02:00:17,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:17,892 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2024-10-11 02:00:17,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 02:00:18,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:18,093 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:18,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash 239702314, now seen corresponding path program 2 times [2024-10-11 02:00:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:18,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885379991] [2024-10-11 02:00:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:18,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044647392] [2024-10-11 02:00:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:00:18,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:18,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:18,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:00:18,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:00:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:18,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 02:00:18,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-11 02:00:18,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885379991] [2024-10-11 02:00:18,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044647392] [2024-10-11 02:00:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044647392] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:18,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-11 02:00:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876396858] [2024-10-11 02:00:18,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:18,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:00:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:00:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:00:18,411 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-11 02:00:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:18,540 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2024-10-11 02:00:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:00:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-10-11 02:00:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:18,543 INFO L225 Difference]: With dead ends: 120 [2024-10-11 02:00:18,543 INFO L226 Difference]: Without dead ends: 118 [2024-10-11 02:00:18,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:00:18,544 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:18,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 166 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-11 02:00:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2024-10-11 02:00:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.171875) internal successors, (75), 66 states have internal predecessors, (75), 40 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-10-11 02:00:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2024-10-11 02:00:18,574 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 64 [2024-10-11 02:00:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:18,575 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2024-10-11 02:00:18,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-11 02:00:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2024-10-11 02:00:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-11 02:00:18,576 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:18,576 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2024-10-11 02:00:18,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 02:00:18,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:18,777 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:18,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1133629236, now seen corresponding path program 3 times [2024-10-11 02:00:18,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:18,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689127264] [2024-10-11 02:00:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:18,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:18,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970991212] [2024-10-11 02:00:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:00:18,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:18,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:18,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:00:18,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 02:00:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:18,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-11 02:00:18,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-10-11 02:00:19,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:19,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689127264] [2024-10-11 02:00:19,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970991212] [2024-10-11 02:00:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970991212] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:19,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:19,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-11 02:00:19,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559135297] [2024-10-11 02:00:19,519 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:19,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 02:00:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 02:00:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-10-11 02:00:19,520 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-11 02:00:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:19,859 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2024-10-11 02:00:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 02:00:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2024-10-11 02:00:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:19,860 INFO L225 Difference]: With dead ends: 124 [2024-10-11 02:00:19,860 INFO L226 Difference]: Without dead ends: 122 [2024-10-11 02:00:19,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:00:19,861 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:19,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 203 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:00:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-11 02:00:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2024-10-11 02:00:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-10-11 02:00:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2024-10-11 02:00:19,881 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 69 [2024-10-11 02:00:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:19,881 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2024-10-11 02:00:19,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-11 02:00:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2024-10-11 02:00:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-11 02:00:19,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:19,883 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:19,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:20,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:20,084 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:20,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1982553465, now seen corresponding path program 1 times [2024-10-11 02:00:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:20,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583578786] [2024-10-11 02:00:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:20,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211313966] [2024-10-11 02:00:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:20,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:20,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:20,098 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:20,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:00:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:20,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 02:00:20,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-11 02:00:20,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-11 02:00:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583578786] [2024-10-11 02:00:21,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211313966] [2024-10-11 02:00:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211313966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:21,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-11 02:00:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074678359] [2024-10-11 02:00:21,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:21,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:00:21,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:00:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:00:21,273 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-11 02:00:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:23,650 INFO L93 Difference]: Finished difference Result 204 states and 289 transitions. [2024-10-11 02:00:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 02:00:23,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 75 [2024-10-11 02:00:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:23,652 INFO L225 Difference]: With dead ends: 204 [2024-10-11 02:00:23,652 INFO L226 Difference]: Without dead ends: 200 [2024-10-11 02:00:23,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 02:00:23,653 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:23,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 403 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-11 02:00:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-10-11 02:00:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2024-10-11 02:00:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-10-11 02:00:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 278 transitions. [2024-10-11 02:00:23,698 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 278 transitions. Word has length 75 [2024-10-11 02:00:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:23,698 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 278 transitions. [2024-10-11 02:00:23,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-11 02:00:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 278 transitions. [2024-10-11 02:00:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-11 02:00:23,700 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:23,700 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:23,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:23,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:00:23,904 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:23,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1975410273, now seen corresponding path program 4 times [2024-10-11 02:00:23,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:23,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684485507] [2024-10-11 02:00:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:00:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-11 02:00:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-11 02:00:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-11 02:00:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-11 02:00:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 02:00:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-11 02:00:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-11 02:00:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-11 02:00:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-11 02:00:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:23,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-11 02:00:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-10-11 02:00:24,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:24,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684485507] [2024-10-11 02:00:24,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684485507] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:24,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:24,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:24,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339232427] [2024-10-11 02:00:24,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:24,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:24,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:24,002 INFO L87 Difference]: Start difference. First operand 196 states and 278 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-10-11 02:00:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:24,094 INFO L93 Difference]: Finished difference Result 249 states and 350 transitions. [2024-10-11 02:00:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:00:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2024-10-11 02:00:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:24,096 INFO L225 Difference]: With dead ends: 249 [2024-10-11 02:00:24,096 INFO L226 Difference]: Without dead ends: 177 [2024-10-11 02:00:24,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:00:24,099 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:24,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-11 02:00:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2024-10-11 02:00:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 61 states have call successors, (61), 14 states have call predecessors, (61), 14 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-10-11 02:00:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 221 transitions. [2024-10-11 02:00:24,135 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 221 transitions. Word has length 89 [2024-10-11 02:00:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:24,136 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 221 transitions. [2024-10-11 02:00:24,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-10-11 02:00:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 221 transitions. [2024-10-11 02:00:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-11 02:00:24,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:24,137 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-10-11 02:00:24,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 02:00:24,138 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:24,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash -708551661, now seen corresponding path program 1 times [2024-10-11 02:00:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:24,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692615927] [2024-10-11 02:00:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:24,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588351020] [2024-10-11 02:00:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:24,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:24,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 02:00:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:24,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 02:00:24,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-10-11 02:00:25,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:25,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:25,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692615927] [2024-10-11 02:00:25,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:25,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588351020] [2024-10-11 02:00:25,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588351020] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:25,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-11 02:00:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191431699] [2024-10-11 02:00:25,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:25,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 02:00:25,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 02:00:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-10-11 02:00:25,195 INFO L87 Difference]: Start difference. First operand 163 states and 221 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-11 02:00:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:25,716 INFO L93 Difference]: Finished difference Result 173 states and 230 transitions. [2024-10-11 02:00:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 02:00:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 91 [2024-10-11 02:00:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:25,718 INFO L225 Difference]: With dead ends: 173 [2024-10-11 02:00:25,718 INFO L226 Difference]: Without dead ends: 171 [2024-10-11 02:00:25,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:00:25,719 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:25,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 383 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:00:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-11 02:00:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2024-10-11 02:00:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 73 states have internal predecessors, (83), 49 states have call successors, (49), 12 states have call predecessors, (49), 12 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-10-11 02:00:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2024-10-11 02:00:25,751 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 91 [2024-10-11 02:00:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:25,752 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2024-10-11 02:00:25,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-11 02:00:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2024-10-11 02:00:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-10-11 02:00:25,752 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:25,753 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:25,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:25,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 02:00:25,953 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:25,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash 694624748, now seen corresponding path program 2 times [2024-10-11 02:00:25,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:25,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379622527] [2024-10-11 02:00:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:25,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:25,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646528123] [2024-10-11 02:00:25,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:00:25,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:25,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:25,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:25,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 02:00:26,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:00:26,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:26,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-11 02:00:26,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-10-11 02:00:26,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-10-11 02:00:27,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379622527] [2024-10-11 02:00:27,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646528123] [2024-10-11 02:00:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646528123] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:27,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-11 02:00:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012690626] [2024-10-11 02:00:27,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:27,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:00:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:00:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:00:27,381 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2024-10-11 02:00:33,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:00:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:35,719 INFO L93 Difference]: Finished difference Result 240 states and 342 transitions. [2024-10-11 02:00:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 02:00:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 108 [2024-10-11 02:00:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:35,724 INFO L225 Difference]: With dead ends: 240 [2024-10-11 02:00:35,724 INFO L226 Difference]: Without dead ends: 238 [2024-10-11 02:00:35,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=351, Invalid=1371, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 02:00:35,725 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 69 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:35,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 681 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 717 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2024-10-11 02:00:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-10-11 02:00:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 218. [2024-10-11 02:00:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 113 states have (on average 1.176991150442478) internal successors, (133), 114 states have internal predecessors, (133), 89 states have call successors, (89), 15 states have call predecessors, (89), 15 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-10-11 02:00:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 310 transitions. [2024-10-11 02:00:35,798 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 310 transitions. Word has length 108 [2024-10-11 02:00:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:35,798 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 310 transitions. [2024-10-11 02:00:35,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2024-10-11 02:00:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 310 transitions. [2024-10-11 02:00:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-11 02:00:35,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:35,799 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:35,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 02:00:35,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 02:00:36,000 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:36,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 47402912, now seen corresponding path program 3 times [2024-10-11 02:00:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:36,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375768624] [2024-10-11 02:00:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:36,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398311047] [2024-10-11 02:00:36,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:00:36,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:36,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:36,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 02:00:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 02:00:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:36,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-11 02:00:36,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-10-11 02:00:36,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-10-11 02:00:39,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375768624] [2024-10-11 02:00:39,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398311047] [2024-10-11 02:00:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398311047] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:39,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:39,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2024-10-11 02:00:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132896168] [2024-10-11 02:00:39,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:39,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 02:00:39,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 02:00:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-10-11 02:00:39,487 INFO L87 Difference]: Start difference. First operand 218 states and 310 transitions. Second operand has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 11 states have call successors, (34) [2024-10-11 02:00:49,661 WARN L286 SmtUtils]: Spent 8.39s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 02:01:03,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:01:07,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:01:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:09,535 INFO L93 Difference]: Finished difference Result 338 states and 488 transitions. [2024-10-11 02:01:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 02:01:09,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 11 states have call successors, (34) Word has length 111 [2024-10-11 02:01:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:09,537 INFO L225 Difference]: With dead ends: 338 [2024-10-11 02:01:09,537 INFO L226 Difference]: Without dead ends: 336 [2024-10-11 02:01:09,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 02:01:09,538 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:09,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 598 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2024-10-11 02:01:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-10-11 02:01:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 313. [2024-10-11 02:01:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 163 states have (on average 1.177914110429448) internal successors, (192), 164 states have internal predecessors, (192), 129 states have call successors, (129), 20 states have call predecessors, (129), 20 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2024-10-11 02:01:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 449 transitions. [2024-10-11 02:01:09,701 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 449 transitions. Word has length 111 [2024-10-11 02:01:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:09,701 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 449 transitions. [2024-10-11 02:01:09,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 11 states have call successors, (34) [2024-10-11 02:01:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 449 transitions. [2024-10-11 02:01:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-11 02:01:09,702 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:09,703 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:09,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 02:01:09,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:09,903 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:09,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1753585742, now seen corresponding path program 4 times [2024-10-11 02:01:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040749481] [2024-10-11 02:01:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:09,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791868227] [2024-10-11 02:01:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 02:01:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:09,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:09,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 02:01:09,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 02:01:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:09,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-11 02:01:09,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-11 02:01:10,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:11,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040749481] [2024-10-11 02:01:11,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791868227] [2024-10-11 02:01:11,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791868227] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:01:11,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:01:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-11 02:01:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146681911] [2024-10-11 02:01:11,182 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:11,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 02:01:11,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 02:01:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-10-11 02:01:11,183 INFO L87 Difference]: Start difference. First operand 313 states and 449 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-10-11 02:01:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:12,048 INFO L93 Difference]: Finished difference Result 331 states and 470 transitions. [2024-10-11 02:01:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 02:01:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2024-10-11 02:01:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:12,050 INFO L225 Difference]: With dead ends: 331 [2024-10-11 02:01:12,050 INFO L226 Difference]: Without dead ends: 329 [2024-10-11 02:01:12,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-10-11 02:01:12,051 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:12,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 427 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 02:01:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-10-11 02:01:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2024-10-11 02:01:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 171 states have (on average 1.1754385964912282) internal successors, (201), 172 states have internal predecessors, (201), 133 states have call successors, (133), 22 states have call predecessors, (133), 22 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2024-10-11 02:01:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 466 transitions. [2024-10-11 02:01:12,226 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 466 transitions. Word has length 113 [2024-10-11 02:01:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:12,226 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 466 transitions. [2024-10-11 02:01:12,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-10-11 02:01:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 466 transitions. [2024-10-11 02:01:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-10-11 02:01:12,227 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:12,227 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:12,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 02:01:12,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 02:01:12,428 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:12,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1094014338, now seen corresponding path program 5 times [2024-10-11 02:01:12,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:12,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242836319] [2024-10-11 02:01:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:12,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:12,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000206252] [2024-10-11 02:01:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 02:01:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:12,446 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:12,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 02:01:12,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-11 02:01:12,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:12,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 02:01:12,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 82 proven. 66 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-11 02:01:16,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:21,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242836319] [2024-10-11 02:01:21,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000206252] [2024-10-11 02:01:21,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000206252] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:01:21,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:01:21,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-11 02:01:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086110494] [2024-10-11 02:01:21,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:21,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:01:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:01:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2024-10-11 02:01:21,451 INFO L87 Difference]: Start difference. First operand 327 states and 466 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-11 02:01:26,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-10-11 02:01:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:26,819 INFO L93 Difference]: Finished difference Result 360 states and 511 transitions. [2024-10-11 02:01:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 02:01:26,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2024-10-11 02:01:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:26,821 INFO L225 Difference]: With dead ends: 360 [2024-10-11 02:01:26,821 INFO L226 Difference]: Without dead ends: 358 [2024-10-11 02:01:26,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2024-10-11 02:01:26,822 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:26,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 477 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-10-11 02:01:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-10-11 02:01:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2024-10-11 02:01:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 186 states have (on average 1.1720430107526882) internal successors, (218), 187 states have internal predecessors, (218), 145 states have call successors, (145), 24 states have call predecessors, (145), 24 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2024-10-11 02:01:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 507 transitions. [2024-10-11 02:01:27,014 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 507 transitions. Word has length 116 [2024-10-11 02:01:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:27,014 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 507 transitions. [2024-10-11 02:01:27,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-11 02:01:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 507 transitions. [2024-10-11 02:01:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-10-11 02:01:27,016 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:27,016 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:27,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 02:01:27,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 02:01:27,216 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:27,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -95789487, now seen corresponding path program 2 times [2024-10-11 02:01:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166578771] [2024-10-11 02:01:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:27,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488070132] [2024-10-11 02:01:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:01:27,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:27,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:27,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 02:01:27,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:01:27,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:27,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-11 02:01:27,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 76 proven. 53 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-10-11 02:01:27,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-10-11 02:01:30,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:30,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166578771] [2024-10-11 02:01:30,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:30,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488070132] [2024-10-11 02:01:30,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488070132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:01:30,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:01:30,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-10-11 02:01:30,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286724890] [2024-10-11 02:01:30,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:30,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 02:01:30,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 02:01:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-10-11 02:01:30,135 INFO L87 Difference]: Start difference. First operand 356 states and 507 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2024-10-11 02:01:32,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:01:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:38,045 INFO L93 Difference]: Finished difference Result 426 states and 597 transitions. [2024-10-11 02:01:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 02:01:38,046 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) Word has length 122 [2024-10-11 02:01:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:38,048 INFO L225 Difference]: With dead ends: 426 [2024-10-11 02:01:38,048 INFO L226 Difference]: Without dead ends: 418 [2024-10-11 02:01:38,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=589, Invalid=2603, Unknown=0, NotChecked=0, Total=3192 [2024-10-11 02:01:38,049 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 139 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:38,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 716 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-10-11 02:01:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2024-10-11 02:01:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 398. [2024-10-11 02:01:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 206 states have (on average 1.1504854368932038) internal successors, (237), 207 states have internal predecessors, (237), 161 states have call successors, (161), 30 states have call predecessors, (161), 30 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2024-10-11 02:01:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 558 transitions. [2024-10-11 02:01:38,342 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 558 transitions. Word has length 122 [2024-10-11 02:01:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:38,342 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 558 transitions. [2024-10-11 02:01:38,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2024-10-11 02:01:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 558 transitions. [2024-10-11 02:01:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-10-11 02:01:38,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:38,344 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:38,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 02:01:38,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 02:01:38,545 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:38,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1022074351, now seen corresponding path program 6 times [2024-10-11 02:01:38,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:38,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120910826] [2024-10-11 02:01:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:38,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:38,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287707388] [2024-10-11 02:01:38,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 02:01:38,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:38,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:38,565 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:38,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 02:01:38,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-11 02:01:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:38,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-11 02:01:38,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 156 proven. 36 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-10-11 02:01:39,940 INFO L311 TraceCheckSpWp]: Computing backward predicates...