./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/hard2.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/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:00:34,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:00:34,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:00:34,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:00:34,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:00:34,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:00:34,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:00:34,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:00:34,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:00:34,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:00:34,229 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:00:34,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:00:34,230 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:00:34,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:00:34,231 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:00:34,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:00:34,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:00:34,231 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:00:34,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:00:34,233 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:00:34,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:00:34,233 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:00:34,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:00:34,234 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:00:34,234 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:00:34,235 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:00:34,235 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:00:34,235 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:00:34,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:00:34,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:00:34,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:00:34,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:00:34,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:00:34,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:00:34,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:00:34,238 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:00:34,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:00:34,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:00:34,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:00:34,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:00:34,239 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:00:34,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:00:34,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2024-10-11 02:00:34,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:00:34,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:00:34,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:00:34,515 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:00:34,515 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:00:34,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2024-10-11 02:00:36,014 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:00:36,183 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:00:36,184 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2024-10-11 02:00:36,190 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/de075be21/4adbd5cde3bc4edf8a844df391415b66/FLAG621aaf57b [2024-10-11 02:00:36,203 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/de075be21/4adbd5cde3bc4edf8a844df391415b66 [2024-10-11 02:00:36,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:00:36,208 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:00:36,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:00:36,211 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:00:36,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:00:36,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb74843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36, skipping insertion in model container [2024-10-11 02:00:36,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,235 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:00:36,423 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/hard2.c[526,539] [2024-10-11 02:00:36,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:00:36,452 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:00:36,467 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/hard2.c[526,539] [2024-10-11 02:00:36,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:00:36,495 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:00:36,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36 WrapperNode [2024-10-11 02:00:36,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:00:36,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:00:36,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:00:36,498 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:00:36,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,524 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2024-10-11 02:00:36,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:00:36,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:00:36,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:00:36,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:00:36,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,553 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-11 02:00:36,553 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,557 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,560 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:00:36,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:00:36,564 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:00:36,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:00:36,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (1/1) ... [2024-10-11 02:00:36,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:00:36,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:36,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:00:36,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:00:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:00:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:00:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 02:00:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:00:36,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:00:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:00:36,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:00:36,717 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:00:36,719 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:00:36,894 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-11 02:00:36,894 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:00:36,936 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:00:36,938 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 02:00:36,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:00:36 BoogieIcfgContainer [2024-10-11 02:00:36,938 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:00:36,940 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:00:36,941 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:00:36,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:00:36,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:00:36" (1/3) ... [2024-10-11 02:00:36,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518b1568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:00:36, skipping insertion in model container [2024-10-11 02:00:36,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:36" (2/3) ... [2024-10-11 02:00:36,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518b1568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:00:36, skipping insertion in model container [2024-10-11 02:00:36,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:00:36" (3/3) ... [2024-10-11 02:00:36,951 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2024-10-11 02:00:36,968 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:00:36,969 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:00:37,026 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:00:37,034 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;@79591e5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:00:37,035 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:00:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-11 02:00:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 02:00:37,048 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:37,048 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 02:00:37,049 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:37,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1133642604, now seen corresponding path program 1 times [2024-10-11 02:00:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:37,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747449056] [2024-10-11 02:00:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:37,315 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 02:00:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747449056] [2024-10-11 02:00:37,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747449056] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:37,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:37,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 02:00:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203751647] [2024-10-11 02:00:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:37,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:37,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:37,357 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 02:00:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:37,474 INFO L93 Difference]: Finished difference Result 53 states and 98 transitions. [2024-10-11 02:00:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:37,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-10-11 02:00:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:37,485 INFO L225 Difference]: With dead ends: 53 [2024-10-11 02:00:37,485 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 02:00:37,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:37,494 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:37,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 80 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 02:00:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2024-10-11 02:00:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:00:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-10-11 02:00:37,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 6 [2024-10-11 02:00:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:37,531 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-10-11 02:00:37,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 02:00:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-10-11 02:00:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 02:00:37,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:37,532 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:37,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:00:37,533 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:37,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 372697474, now seen corresponding path program 1 times [2024-10-11 02:00:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888288257] [2024-10-11 02:00:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:37,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 02:00:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:00:37,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:37,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888288257] [2024-10-11 02:00:37,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888288257] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:37,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:37,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396379808] [2024-10-11 02:00:37,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:37,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:37,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:37,705 INFO L87 Difference]: Start difference. First operand 23 states and 30 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, (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 02:00:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:37,777 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-10-11 02:00:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:37,779 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, (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 11 [2024-10-11 02:00:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:37,780 INFO L225 Difference]: With dead ends: 36 [2024-10-11 02:00:37,781 INFO L226 Difference]: Without dead ends: 34 [2024-10-11 02:00:37,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:37,782 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:37,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-11 02:00:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-10-11 02:00:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:00:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-10-11 02:00:37,792 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2024-10-11 02:00:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:37,792 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-10-11 02:00:37,793 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, (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 02:00:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-10-11 02:00:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 02:00:37,794 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:37,794 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:37,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:00:37,794 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:37,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash -413140716, now seen corresponding path program 1 times [2024-10-11 02:00:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:37,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117536721] [2024-10-11 02:00:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:37,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265003156] [2024-10-11 02:00:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:37,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:37,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:37,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:00:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:37,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:00:37,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:00:38,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:38,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:38,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117536721] [2024-10-11 02:00:38,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265003156] [2024-10-11 02:00:38,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265003156] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:38,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:38,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008976732] [2024-10-11 02:00:38,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:38,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:38,044 INFO L87 Difference]: Start difference. First operand 27 states and 33 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:00:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:38,128 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2024-10-11 02:00:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:38,128 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-10-11 02:00:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:38,129 INFO L225 Difference]: With dead ends: 53 [2024-10-11 02:00:38,130 INFO L226 Difference]: Without dead ends: 40 [2024-10-11 02:00:38,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:38,131 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:38,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 75 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-11 02:00:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-11 02:00:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 02:00:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-10-11 02:00:38,150 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2024-10-11 02:00:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:38,150 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-10-11 02:00:38,150 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:00:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-10-11 02:00:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 02:00:38,151 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:38,151 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:38,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 02:00:38,355 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 02:00:38,356 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:38,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1334915055, now seen corresponding path program 1 times [2024-10-11 02:00:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:38,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715008781] [2024-10-11 02:00:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:38,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43968274] [2024-10-11 02:00:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:38,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:38,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:38,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:00:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:38,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:00:38,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:00:38,527 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:38,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715008781] [2024-10-11 02:00:38,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:38,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43968274] [2024-10-11 02:00:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43968274] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:38,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:38,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882886520] [2024-10-11 02:00:38,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:38,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:38,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:38,531 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:00:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:38,606 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-10-11 02:00:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-11 02:00:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:38,608 INFO L225 Difference]: With dead ends: 53 [2024-10-11 02:00:38,608 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 02:00:38,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:38,613 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:38,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 57 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 02:00:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-11 02:00:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-11 02:00:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2024-10-11 02:00:38,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 23 [2024-10-11 02:00:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:38,625 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2024-10-11 02:00:38,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:00:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2024-10-11 02:00:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 02:00:38,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:38,626 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 02:00:38,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:38,827 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 02:00:38,827 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:38,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1951602144, now seen corresponding path program 1 times [2024-10-11 02:00:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990942489] [2024-10-11 02:00:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:38,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644362037] [2024-10-11 02:00:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:38,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:38,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:38,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:38,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:00:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:38,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 02:00:38,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 02:00:39,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 02:00:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990942489] [2024-10-11 02:00:39,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644362037] [2024-10-11 02:00:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644362037] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:39,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:39,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-11 02:00:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099221630] [2024-10-11 02:00:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:39,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:00:39,101 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:00:40,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:00:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:40,453 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2024-10-11 02:00:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2024-10-11 02:00:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:40,456 INFO L225 Difference]: With dead ends: 60 [2024-10-11 02:00:40,456 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 02:00:40,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:00:40,457 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:40,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-11 02:00:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 02:00:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-10-11 02:00:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-11 02:00:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2024-10-11 02:00:40,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 33 [2024-10-11 02:00:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:40,471 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2024-10-11 02:00:40,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:00:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2024-10-11 02:00:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 02:00:40,473 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:40,473 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:40,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 02:00:40,677 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 02:00:40,678 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:40,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1956440568, now seen corresponding path program 1 times [2024-10-11 02:00:40,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:40,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628983234] [2024-10-11 02:00:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 02:00:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:00:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 02:00:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-11 02:00:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-11 02:00:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:00:40,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:40,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628983234] [2024-10-11 02:00:40,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628983234] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:40,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:40,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:40,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367727712] [2024-10-11 02:00:40,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:40,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:40,851 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:00:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:40,897 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-10-11 02:00:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:40,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-10-11 02:00:40,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:40,900 INFO L225 Difference]: With dead ends: 65 [2024-10-11 02:00:40,900 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 02:00:40,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:40,901 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:40,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 85 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 02:00:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-11 02:00:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-11 02:00:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-10-11 02:00:40,917 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 39 [2024-10-11 02:00:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:40,917 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-10-11 02:00:40,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:00:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-10-11 02:00:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-11 02:00:40,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:40,921 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:40,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 02:00:40,921 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:40,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1082893162, now seen corresponding path program 1 times [2024-10-11 02:00:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:40,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832143889] [2024-10-11 02:00:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:40,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:40,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455824202] [2024-10-11 02:00:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:40,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:40,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:40,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:00:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:41,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 02:00:41,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-11 02:00:41,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-11 02:00:42,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:42,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832143889] [2024-10-11 02:00:42,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:42,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455824202] [2024-10-11 02:00:42,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455824202] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:42,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:42,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-10-11 02:00:42,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616213385] [2024-10-11 02:00:42,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:42,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 02:00:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 02:00:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:00:42,841 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-11 02:00:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:43,402 INFO L93 Difference]: Finished difference Result 128 states and 173 transitions. [2024-10-11 02:00:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 02:00:43,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 53 [2024-10-11 02:00:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:43,404 INFO L225 Difference]: With dead ends: 128 [2024-10-11 02:00:43,404 INFO L226 Difference]: Without dead ends: 105 [2024-10-11 02:00:43,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:00:43,405 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:43,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 113 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:00:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-11 02:00:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2024-10-11 02:00:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-11 02:00:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2024-10-11 02:00:43,441 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 53 [2024-10-11 02:00:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:43,442 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2024-10-11 02:00:43,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-11 02:00:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2024-10-11 02:00:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-11 02:00:43,443 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:43,443 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:43,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 02:00:43,647 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,SelfDestructingSolverStorable6 [2024-10-11 02:00:43,648 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:43,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -288720889, now seen corresponding path program 1 times [2024-10-11 02:00:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:43,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426077113] [2024-10-11 02:00:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:43,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:43,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540688523] [2024-10-11 02:00:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:43,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:43,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:43,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:00:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:43,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-11 02:00:43,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-11 02:00:43,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-11 02:00:44,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:44,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426077113] [2024-10-11 02:00:44,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:44,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540688523] [2024-10-11 02:00:44,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540688523] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:44,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:00:44,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-10-11 02:00:44,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905986780] [2024-10-11 02:00:44,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:44,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:00:44,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:00:44,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:00:44,479 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-11 02:00:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:45,035 INFO L93 Difference]: Finished difference Result 158 states and 211 transitions. [2024-10-11 02:00:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 02:00:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 64 [2024-10-11 02:00:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:45,038 INFO L225 Difference]: With dead ends: 158 [2024-10-11 02:00:45,038 INFO L226 Difference]: Without dead ends: 126 [2024-10-11 02:00:45,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:00:45,044 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:45,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 175 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:00:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-11 02:00:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2024-10-11 02:00:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 65 states have internal predecessors, (71), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-10-11 02:00:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2024-10-11 02:00:45,069 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 64 [2024-10-11 02:00:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:45,069 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2024-10-11 02:00:45,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-11 02:00:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2024-10-11 02:00:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-11 02:00:45,071 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:45,071 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:45,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:00:45,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:45,276 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:45,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1505880913, now seen corresponding path program 1 times [2024-10-11 02:00:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:45,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293599028] [2024-10-11 02:00:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 02:00:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:00:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:00:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 02:00:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-11 02:00:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-11 02:00:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-11 02:00:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-11 02:00:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-11 02:00:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-11 02:00:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-11 02:00:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:00:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293599028] [2024-10-11 02:00:45,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293599028] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216253479] [2024-10-11 02:00:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:45,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:45,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:00:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:45,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 02:00:45,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:00:45,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:00:46,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216253479] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:46,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:00:46,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-11 02:00:46,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303195503] [2024-10-11 02:00:46,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:46,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 02:00:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 02:00:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:00:46,263 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-11 02:00:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:46,444 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2024-10-11 02:00:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:00:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 69 [2024-10-11 02:00:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:46,446 INFO L225 Difference]: With dead ends: 119 [2024-10-11 02:00:46,446 INFO L226 Difference]: Without dead ends: 90 [2024-10-11 02:00:46,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:00:46,447 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:46,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 160 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-11 02:00:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-10-11 02:00:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-11 02:00:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2024-10-11 02:00:46,467 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 69 [2024-10-11 02:00:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:46,469 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2024-10-11 02:00:46,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-11 02:00:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2024-10-11 02:00:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-11 02:00:46,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:46,472 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 02:00:46,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:00:46,673 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,SelfDestructingSolverStorable8 [2024-10-11 02:00:46,673 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:46,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1759922767, now seen corresponding path program 2 times [2024-10-11 02:00:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:46,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968175345] [2024-10-11 02:00:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:46,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862218122] [2024-10-11 02:00:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:00:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:46,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:46,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:00:46,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:00:46,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:46,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 02:00:46,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-11 02:00:47,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-11 02:01:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968175345] [2024-10-11 02:01:02,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862218122] [2024-10-11 02:01:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862218122] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:01:02,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:01:02,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-10-11 02:01:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925041142] [2024-10-11 02:01:02,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:02,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 02:01:02,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 02:01:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:01:02,735 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 23 states have internal predecessors, (41), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-10-11 02:01:14,684 WARN L286 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 221 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 02:01:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:14,844 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2024-10-11 02:01:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 02:01:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 23 states have internal predecessors, (41), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 83 [2024-10-11 02:01:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:14,847 INFO L225 Difference]: With dead ends: 203 [2024-10-11 02:01:14,847 INFO L226 Difference]: Without dead ends: 170 [2024-10-11 02:01:14,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 02:01:14,849 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:14,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 347 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-11 02:01:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-11 02:01:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2024-10-11 02:01:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 96 states have internal predecessors, (107), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2024-10-11 02:01:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2024-10-11 02:01:14,908 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 83 [2024-10-11 02:01:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:14,909 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2024-10-11 02:01:14,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 23 states have internal predecessors, (41), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-10-11 02:01:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2024-10-11 02:01:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-10-11 02:01:14,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:14,911 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 02:01:14,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 02:01:15,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:15,116 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:15,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash 425213927, now seen corresponding path program 3 times [2024-10-11 02:01:15,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529614815] [2024-10-11 02:01:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:15,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506903078] [2024-10-11 02:01:15,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:01:15,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:15,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:15,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:15,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:01:15,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 02:01:15,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:15,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 02:01:15,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-10-11 02:01:15,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:16,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529614815] [2024-10-11 02:01:16,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506903078] [2024-10-11 02:01:16,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506903078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:01:16,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:01:16,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-11 02:01:16,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682947616] [2024-10-11 02:01:16,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:16,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:01:16,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:16,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:01:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:01:16,445 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:01:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:16,599 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2024-10-11 02:01:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:01:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 88 [2024-10-11 02:01:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:16,601 INFO L225 Difference]: With dead ends: 169 [2024-10-11 02:01:16,601 INFO L226 Difference]: Without dead ends: 167 [2024-10-11 02:01:16,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:01:16,602 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:16,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:01:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-11 02:01:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2024-10-11 02:01:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 108 states have internal predecessors, (119), 41 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2024-10-11 02:01:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2024-10-11 02:01:16,650 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 88 [2024-10-11 02:01:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:16,651 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2024-10-11 02:01:16,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:01:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2024-10-11 02:01:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-11 02:01:16,652 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:16,652 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:16,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 02:01:16,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:01:16,853 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:16,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1439503186, now seen corresponding path program 2 times [2024-10-11 02:01:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:16,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501262149] [2024-10-11 02:01:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:16,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:16,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175579476] [2024-10-11 02:01:16,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:01:16,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:16,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:16,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:16,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:01:16,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:01:16,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:16,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-11 02:01:16,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-11 02:01:17,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:17,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501262149] [2024-10-11 02:01:17,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175579476] [2024-10-11 02:01:17,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175579476] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:01:17,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:01:17,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-11 02:01:17,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878276695] [2024-10-11 02:01:17,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:17,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 02:01:17,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 02:01:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-10-11 02:01:17,562 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-11 02:01:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:17,884 INFO L93 Difference]: Finished difference Result 220 states and 257 transitions. [2024-10-11 02:01:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 02:01:17,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 94 [2024-10-11 02:01:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:17,886 INFO L225 Difference]: With dead ends: 220 [2024-10-11 02:01:17,886 INFO L226 Difference]: Without dead ends: 162 [2024-10-11 02:01:17,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:01:17,887 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:17,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 302 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:01:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-11 02:01:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2024-10-11 02:01:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 102 states have internal predecessors, (110), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 02:01:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2024-10-11 02:01:17,928 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 94 [2024-10-11 02:01:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:17,928 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2024-10-11 02:01:17,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-11 02:01:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2024-10-11 02:01:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-11 02:01:17,929 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:17,929 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 02:01:18,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:18,130 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:18,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1267116208, now seen corresponding path program 1 times [2024-10-11 02:01:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649813217] [2024-10-11 02:01:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950686040] [2024-10-11 02:01:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:18,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:18,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:18,151 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:18,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:01:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:18,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-11 02:01:18,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-11 02:01:18,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-11 02:01:19,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:19,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649813217] [2024-10-11 02:01:19,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:01:19,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950686040] [2024-10-11 02:01:19,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950686040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:01:19,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:01:19,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-10-11 02:01:19,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263661091] [2024-10-11 02:01:19,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:19,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 02:01:19,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 02:01:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-10-11 02:01:19,385 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2024-10-11 02:01:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:20,268 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2024-10-11 02:01:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 02:01:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 94 [2024-10-11 02:01:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:20,270 INFO L225 Difference]: With dead ends: 200 [2024-10-11 02:01:20,270 INFO L226 Difference]: Without dead ends: 198 [2024-10-11 02:01:20,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2024-10-11 02:01:20,271 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:20,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 257 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:01:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-10-11 02:01:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2024-10-11 02:01:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 111 states have internal predecessors, (125), 43 states have call successors, (43), 20 states have call predecessors, (43), 20 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2024-10-11 02:01:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 210 transitions. [2024-10-11 02:01:20,322 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 210 transitions. Word has length 94 [2024-10-11 02:01:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:20,322 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 210 transitions. [2024-10-11 02:01:20,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2024-10-11 02:01:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 210 transitions. [2024-10-11 02:01:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-10-11 02:01:20,324 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:20,324 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:01:20,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 02:01:20,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 02:01:20,529 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:20,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -621318040, now seen corresponding path program 2 times [2024-10-11 02:01:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424219470] [2024-10-11 02:01:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 02:01:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:01:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:01:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 02:01:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-11 02:01:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-11 02:01:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-11 02:01:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-11 02:01:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-11 02:01:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-11 02:01:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-11 02:01:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-11 02:01:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-11 02:01:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-11 02:01:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-11 02:01:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-10-11 02:01:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:01:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-11 02:01:20,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:01:20,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424219470] [2024-10-11 02:01:20,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424219470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:01:20,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614428546] [2024-10-11 02:01:20,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:01:20,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:20,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:20,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:20,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 02:01:20,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:01:20,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:20,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 02:01:20,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:01:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-11 02:01:21,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-11 02:01:22,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614428546] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:01:22,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:01:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 21 [2024-10-11 02:01:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284689106] [2024-10-11 02:01:22,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:01:22,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:01:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:01:22,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:01:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:01:22,017 INFO L87 Difference]: Start difference. First operand 171 states and 210 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-10-11 02:01:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:01:22,376 INFO L93 Difference]: Finished difference Result 217 states and 257 transitions. [2024-10-11 02:01:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 02:01:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) Word has length 99 [2024-10-11 02:01:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:01:22,377 INFO L225 Difference]: With dead ends: 217 [2024-10-11 02:01:22,377 INFO L226 Difference]: Without dead ends: 129 [2024-10-11 02:01:22,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-10-11 02:01:22,378 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:01:22,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 254 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:01:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-11 02:01:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2024-10-11 02:01:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 80 states have internal predecessors, (84), 26 states have call successors, (26), 17 states have call predecessors, (26), 17 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-11 02:01:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2024-10-11 02:01:22,424 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 99 [2024-10-11 02:01:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:01:22,425 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2024-10-11 02:01:22,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-10-11 02:01:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2024-10-11 02:01:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-11 02:01:22,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:01:22,426 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 02:01:22,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 02:01:22,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 02:01:22,626 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:01:22,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:01:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1705850365, now seen corresponding path program 4 times [2024-10-11 02:01:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:01:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203549450] [2024-10-11 02:01:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:01:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:01:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:01:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675715039] [2024-10-11 02:01:22,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 02:01:22,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:01:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:01:22,667 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:01:22,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 02:01:22,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 02:01:22,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:01:22,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-11 02:01:22,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:02:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 144 proven. 92 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-10-11 02:02:00,089 INFO L311 TraceCheckSpWp]: Computing backward predicates...