./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.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-scaling/ps5-ll_unwindbound100.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 aab72618ab8befdf7d3c20393ae3aa97ba59d5fce32037d3e275043b0cba9f2d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:27:48,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:27:48,871 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:27:48,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:27:48,887 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:27:48,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:27:48,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:27:48,920 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:27:48,921 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:27:48,922 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:27:48,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:27:48,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:27:48,926 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:27:48,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:27:48,926 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:27:48,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:27:48,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:27:48,927 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:27:48,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:27:48,928 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:27:48,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:27:48,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:27:48,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:27:48,933 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:27:48,933 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:27:48,933 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:27:48,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:27:48,934 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:27:48,934 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:27:48,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:27:48,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:27:48,935 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:27:48,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:27:48,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:27:48,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:27:48,935 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:27:48,936 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:27:48,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:27:48,937 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:27:48,937 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:27:48,938 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:27:48,938 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:27:48,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab72618ab8befdf7d3c20393ae3aa97ba59d5fce32037d3e275043b0cba9f2d [2024-10-11 02:27:49,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:27:49,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:27:49,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:27:49,226 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:27:49,226 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:27:49,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2024-10-11 02:27:50,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:27:50,874 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:27:50,875 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2024-10-11 02:27:50,882 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/d06606c1c/96ebb79b85624e04b8c95680a8b27096/FLAG04e7027b3 [2024-10-11 02:27:50,894 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/d06606c1c/96ebb79b85624e04b8c95680a8b27096 [2024-10-11 02:27:50,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:27:50,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:27:50,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:27:50,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:27:50,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:27:50,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:50" (1/1) ... [2024-10-11 02:27:50,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ddeae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50, skipping insertion in model container [2024-10-11 02:27:50,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:50" (1/1) ... [2024-10-11 02:27:50,927 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:27:51,113 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c[458,471] [2024-10-11 02:27:51,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:27:51,148 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:27:51,160 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c[458,471] [2024-10-11 02:27:51,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:27:51,192 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:27:51,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51 WrapperNode [2024-10-11 02:27:51,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:27:51,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:27:51,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:27:51,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:27:51,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,226 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-10-11 02:27:51,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:27:51,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:27:51,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:27:51,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:27:51,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,259 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 02:27:51,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,261 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:27:51,268 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:27:51,268 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:27:51,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:27:51,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (1/1) ... [2024-10-11 02:27:51,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:27:51,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:51,307 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 02:27:51,311 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 02:27:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:27:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:27:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:27:51,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:27:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:27:51,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:27:51,423 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:27:51,426 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:27:51,535 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-11 02:27:51,535 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:27:51,557 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:27:51,557 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 02:27:51,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:51 BoogieIcfgContainer [2024-10-11 02:27:51,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:27:51,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:27:51,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:27:51,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:27:51,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:50" (1/3) ... [2024-10-11 02:27:51,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c9fcfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:51, skipping insertion in model container [2024-10-11 02:27:51,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:51" (2/3) ... [2024-10-11 02:27:51,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c9fcfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:51, skipping insertion in model container [2024-10-11 02:27:51,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:51" (3/3) ... [2024-10-11 02:27:51,565 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound100.c [2024-10-11 02:27:51,578 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:27:51,578 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:27:51,629 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:27:51,635 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;@72c96083, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:27:51,636 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:27:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 02:27:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 02:27:51,648 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:51,648 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:51,649 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:51,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:51,654 INFO L85 PathProgramCache]: Analyzing trace with hash 793793432, now seen corresponding path program 1 times [2024-10-11 02:27:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:51,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92409103] [2024-10-11 02:27:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:51,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92409103] [2024-10-11 02:27:51,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92409103] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:27:51,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:27:51,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:27:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604563308] [2024-10-11 02:27:51,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:27:51,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:27:51,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:27:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:27:51,861 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:27:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:51,932 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2024-10-11 02:27:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:27:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 02:27:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:51,941 INFO L225 Difference]: With dead ends: 32 [2024-10-11 02:27:51,943 INFO L226 Difference]: Without dead ends: 15 [2024-10-11 02:27:51,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 02:27:51,951 INFO L432 NwaCegarLoop]: 18 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, 18 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 02:27:51,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:27:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-11 02:27:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-11 02:27:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 02:27:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-11 02:27:51,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2024-10-11 02:27:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:51,991 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-11 02:27:51,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:27:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-11 02:27:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 02:27:51,992 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:51,992 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:51,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:27:51,993 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:51,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1922989550, now seen corresponding path program 1 times [2024-10-11 02:27:51,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:51,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904974426] [2024-10-11 02:27:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:51,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904974426] [2024-10-11 02:27:52,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904974426] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:27:52,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:27:52,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 02:27:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265444630] [2024-10-11 02:27:52,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:27:52,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 02:27:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 02:27:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:27:52,169 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:27:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:52,190 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-10-11 02:27:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 02:27:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 02:27:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:52,192 INFO L225 Difference]: With dead ends: 25 [2024-10-11 02:27:52,192 INFO L226 Difference]: Without dead ends: 17 [2024-10-11 02:27:52,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:27:52,194 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:52,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:27:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-11 02:27:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-11 02:27:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 02:27:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-11 02:27:52,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2024-10-11 02:27:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:52,204 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-11 02:27:52,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:27:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-11 02:27:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 02:27:52,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:52,205 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:52,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:27:52,206 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:52,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1924777010, now seen corresponding path program 1 times [2024-10-11 02:27:52,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:52,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183867422] [2024-10-11 02:27:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:52,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:52,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772743926] [2024-10-11 02:27:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:52,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:52,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:52,242 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 02:27:52,243 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 02:27:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:52,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:27:52,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:52,398 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:27:52,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:52,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183867422] [2024-10-11 02:27:52,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:27:52,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772743926] [2024-10-11 02:27:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772743926] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:27:52,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:27:52,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:27:52,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456539340] [2024-10-11 02:27:52,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:27:52,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:27:52,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:27:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:27:52,402 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:27:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:52,470 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-10-11 02:27:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:27:52,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 02:27:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:52,471 INFO L225 Difference]: With dead ends: 27 [2024-10-11 02:27:52,472 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 02:27:52,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 02:27:52,473 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:52,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:27:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 02:27:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-11 02:27:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 02:27:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-11 02:27:52,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 9 [2024-10-11 02:27:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:52,487 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-11 02:27:52,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:27:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-11 02:27:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 02:27:52,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:52,490 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:52,507 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 02:27:52,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:52,692 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:52,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash 76913492, now seen corresponding path program 1 times [2024-10-11 02:27:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111989685] [2024-10-11 02:27:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:52,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-11 02:27:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111989685] [2024-10-11 02:27:52,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111989685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:27:52,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676976786] [2024-10-11 02:27:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:52,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:52,895 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 02:27:52,898 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 02:27:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:52,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 02:27:52,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:53,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:53,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676976786] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:27:53,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:27:53,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-11 02:27:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251920679] [2024-10-11 02:27:53,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:27:53,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:27:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:27:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:27:53,079 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:27:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:53,164 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-10-11 02:27:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:27:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2024-10-11 02:27:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:53,166 INFO L225 Difference]: With dead ends: 57 [2024-10-11 02:27:53,166 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 02:27:53,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:27:53,169 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:53,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 75 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:27:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 02:27:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-10-11 02:27:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-11 02:27:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-10-11 02:27:53,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 17 [2024-10-11 02:27:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:53,189 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-10-11 02:27:53,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:27:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-10-11 02:27:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 02:27:53,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:53,191 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:53,208 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 02:27:53,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:53,392 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:53,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 78700952, now seen corresponding path program 1 times [2024-10-11 02:27:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:53,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435534631] [2024-10-11 02:27:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:53,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:53,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887464243] [2024-10-11 02:27:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:53,416 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 02:27:53,419 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 02:27:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:53,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:27:53,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:27:53,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 02:27:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435534631] [2024-10-11 02:27:53,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:27:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887464243] [2024-10-11 02:27:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887464243] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:27:53,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:27:53,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-11 02:27:53,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565363010] [2024-10-11 02:27:53,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:27:53,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:27:53,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:27:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:27:53,641 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:27:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:53,692 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-10-11 02:27:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:27:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-11 02:27:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:53,695 INFO L225 Difference]: With dead ends: 59 [2024-10-11 02:27:53,695 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 02:27:53,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:27:53,696 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:53,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:27:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 02:27:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-10-11 02:27:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-11 02:27:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-10-11 02:27:53,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 17 [2024-10-11 02:27:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:53,726 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-10-11 02:27:53,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:27:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-10-11 02:27:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 02:27:53,728 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:53,728 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:53,749 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 02:27:53,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:53,933 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:53,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 731759343, now seen corresponding path program 1 times [2024-10-11 02:27:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866817399] [2024-10-11 02:27:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:53,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272399783] [2024-10-11 02:27:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:53,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:53,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:53,963 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 02:27:53,965 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 02:27:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 02:27:54,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:27:54,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:27:54,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:54,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866817399] [2024-10-11 02:27:54,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:27:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272399783] [2024-10-11 02:27:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272399783] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:27:54,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:27:54,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-11 02:27:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21972873] [2024-10-11 02:27:54,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:27:54,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:27:54,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:27:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:27:54,265 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:27:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:54,382 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-10-11 02:27:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:27:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2024-10-11 02:27:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:54,384 INFO L225 Difference]: With dead ends: 54 [2024-10-11 02:27:54,384 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 02:27:54,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:27:54,385 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:54,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:27:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 02:27:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-11 02:27:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:27:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-10-11 02:27:54,408 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2024-10-11 02:27:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:54,409 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-10-11 02:27:54,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:27:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-10-11 02:27:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 02:27:54,411 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:54,411 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:54,428 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 02:27:54,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 02:27:54,616 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:54,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1074423298, now seen corresponding path program 1 times [2024-10-11 02:27:54,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236208961] [2024-10-11 02:27:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-11 02:27:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:27:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 02:27:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-11 02:27:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 02:27:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 02:27:54,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236208961] [2024-10-11 02:27:54,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236208961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:27:54,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810851884] [2024-10-11 02:27:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:54,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:54,939 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 02:27:54,940 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 02:27:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:27:54,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:27:55,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 02:27:55,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 02:27:55,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810851884] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:27:55,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:27:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-11 02:27:55,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959258299] [2024-10-11 02:27:55,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:27:55,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:27:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:27:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:27:55,199 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-10-11 02:27:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:55,467 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2024-10-11 02:27:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 02:27:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 46 [2024-10-11 02:27:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:55,470 INFO L225 Difference]: With dead ends: 131 [2024-10-11 02:27:55,470 INFO L226 Difference]: Without dead ends: 121 [2024-10-11 02:27:55,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-10-11 02:27:55,473 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:55,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 111 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:27:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-11 02:27:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2024-10-11 02:27:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 73 states have internal predecessors, (75), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-11 02:27:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-10-11 02:27:55,510 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 46 [2024-10-11 02:27:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:55,510 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-10-11 02:27:55,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-10-11 02:27:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-10-11 02:27:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-11 02:27:55,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:55,516 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:55,536 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 02:27:55,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:55,717 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:55,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1441866883, now seen corresponding path program 2 times [2024-10-11 02:27:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350895954] [2024-10-11 02:27:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:55,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639261426] [2024-10-11 02:27:55,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:27:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:55,771 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 02:27:55,773 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 02:27:55,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:27:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:27:55,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 02:27:55,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:27:56,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:27:56,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350895954] [2024-10-11 02:27:56,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:27:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639261426] [2024-10-11 02:27:56,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639261426] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:27:56,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:27:56,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-10-11 02:27:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067151028] [2024-10-11 02:27:56,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:27:56,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 02:27:56,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 02:27:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-10-11 02:27:56,431 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 02:27:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:56,900 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2024-10-11 02:27:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 02:27:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 52 [2024-10-11 02:27:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:56,902 INFO L225 Difference]: With dead ends: 102 [2024-10-11 02:27:56,902 INFO L226 Difference]: Without dead ends: 91 [2024-10-11 02:27:56,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-10-11 02:27:56,903 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:56,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 348 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:27:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-11 02:27:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-10-11 02:27:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 02:27:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2024-10-11 02:27:56,927 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 52 [2024-10-11 02:27:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:56,928 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2024-10-11 02:27:56,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 02:27:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2024-10-11 02:27:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-10-11 02:27:56,933 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:56,933 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:56,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 02:27:57,134 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,SelfDestructingSolverStorable7 [2024-10-11 02:27:57,134 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:57,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1566715457, now seen corresponding path program 3 times [2024-10-11 02:27:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573914696] [2024-10-11 02:27:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:57,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550066341] [2024-10-11 02:27:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:27:57,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:57,248 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 02:27:57,250 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