./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.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 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:26:19,353 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:26:19,398 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:26:19,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:26:19,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:26:19,425 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:26:19,426 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:26:19,426 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:26:19,426 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:26:19,426 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:26:19,427 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:26:19,427 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:26:19,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:26:19,432 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:26:19,432 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:26:19,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:26:19,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:26:19,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:26:19,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:26:19,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:26:19,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:26:19,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:26:19,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:26:19,436 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:26:19,436 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:26:19,436 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:26:19,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:26:19,437 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:26:19,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:26:19,437 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:26:19,437 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:26:19,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:26:19,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:26:19,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:26:19,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:26:19,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:26:19,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:26:19,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:26:19,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:26:19,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:26:19,441 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:26:19,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:26:19,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 [2024-10-11 02:26:19,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:26:19,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:26:19,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:26:19,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:26:19,687 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:26:19,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2024-10-11 02:26:20,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:26:21,131 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:26:21,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2024-10-11 02:26:21,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/29d1f64f0/ee0d87558c93483096d6d748fe4646df/FLAG6a4b68003 [2024-10-11 02:26:21,553 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/29d1f64f0/ee0d87558c93483096d6d748fe4646df [2024-10-11 02:26:21,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:26:21,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:26:21,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:26:21,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:26:21,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:26:21,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ccb2e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21, skipping insertion in model container [2024-10-11 02:26:21,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,581 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:26:21,705 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2024-10-11 02:26:21,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:26:21,735 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:26:21,745 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2024-10-11 02:26:21,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:26:21,768 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:26:21,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21 WrapperNode [2024-10-11 02:26:21,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:26:21,770 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:26:21,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:26:21,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:26:21,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,796 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2024-10-11 02:26:21,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:26:21,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:26:21,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:26:21,797 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:26:21,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,826 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 02:26:21,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:26:21,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:26:21,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:26:21,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:26:21,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2024-10-11 02:26:21,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:26:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:21,892 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 02:26:21,894 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 02:26:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:26:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 02:26:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 02:26:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:26:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:26:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:26:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:26:21,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:26:22,010 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:26:22,011 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:26:22,107 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-11 02:26:22,107 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:26:22,125 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:26:22,126 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 02:26:22,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22 BoogieIcfgContainer [2024-10-11 02:26:22,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:26:22,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:26:22,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:26:22,131 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:26:22,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:21" (1/3) ... [2024-10-11 02:26:22,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c00af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:22, skipping insertion in model container [2024-10-11 02:26:22,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (2/3) ... [2024-10-11 02:26:22,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c00af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:22, skipping insertion in model container [2024-10-11 02:26:22,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22" (3/3) ... [2024-10-11 02:26:22,133 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2024-10-11 02:26:22,146 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:26:22,146 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:26:22,187 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:26:22,192 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;@3ee58fe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:26:22,193 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:26:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 02:26:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 02:26:22,206 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:22,207 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:22,207 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:22,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1698673820, now seen corresponding path program 1 times [2024-10-11 02:26:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:22,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325654333] [2024-10-11 02:26:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:22,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:26:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:22,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:26:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:22,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:26:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:26:22,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:22,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325654333] [2024-10-11 02:26:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325654333] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:26:22,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:26:22,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:26:22,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269816015] [2024-10-11 02:26:22,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:26:22,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:26:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:26:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:26:22,392 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:26:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:22,413 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2024-10-11 02:26:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:26:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-11 02:26:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:22,419 INFO L225 Difference]: With dead ends: 46 [2024-10-11 02:26:22,420 INFO L226 Difference]: Without dead ends: 22 [2024-10-11 02:26:22,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:26:22,424 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:22,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:26:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-11 02:26:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-11 02:26:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 02:26:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-10-11 02:26:22,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 23 [2024-10-11 02:26:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:22,450 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-10-11 02:26:22,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:26:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-10-11 02:26:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 02:26:22,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:22,452 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:22,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:26:22,453 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:22,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 549966490, now seen corresponding path program 1 times [2024-10-11 02:26:22,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:22,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493502400] [2024-10-11 02:26:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:22,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:26:22,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252525291] [2024-10-11 02:26:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:22,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:22,484 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 02:26:22,485 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 02:26:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:22,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 02:26:22,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:26:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:26:22,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:26:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:26:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:22,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493502400] [2024-10-11 02:26:22,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:26:22,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252525291] [2024-10-11 02:26:22,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252525291] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:26:22,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:26:22,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-10-11 02:26:22,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329837489] [2024-10-11 02:26:22,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:26:22,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:26:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:26:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:26:22,881 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:26:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:22,980 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-10-11 02:26:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:26:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-11 02:26:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:22,982 INFO L225 Difference]: With dead ends: 33 [2024-10-11 02:26:22,982 INFO L226 Difference]: Without dead ends: 31 [2024-10-11 02:26:22,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:26:22,985 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:22,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:26:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-11 02:26:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-10-11 02:26:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 02:26:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-10-11 02:26:22,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2024-10-11 02:26:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:22,995 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-10-11 02:26:22,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:26:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-10-11 02:26:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 02:26:22,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:22,998 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:23,024 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 02:26:23,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:23,199 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:23,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1559575677, now seen corresponding path program 1 times [2024-10-11 02:26:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:23,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230960493] [2024-10-11 02:26:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:23,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:26:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:23,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:26:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:23,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:26:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:23,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 02:26:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:26:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:23,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230960493] [2024-10-11 02:26:23,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230960493] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:26:23,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:26:23,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 02:26:23,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992244767] [2024-10-11 02:26:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:26:23,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:26:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:26:23,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:26:23,433 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:26:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:23,496 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-10-11 02:26:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:26:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-11 02:26:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:23,498 INFO L225 Difference]: With dead ends: 38 [2024-10-11 02:26:23,498 INFO L226 Difference]: Without dead ends: 31 [2024-10-11 02:26:23,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:26:23,499 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:23,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:26:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-11 02:26:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-10-11 02:26:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 02:26:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-10-11 02:26:23,507 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 29 [2024-10-11 02:26:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:23,507 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-10-11 02:26:23,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:26:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-10-11 02:26:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 02:26:23,508 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:23,508 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:23,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 02:26:23,509 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:23,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:23,509 INFO L85 PathProgramCache]: Analyzing trace with hash 191228685, now seen corresponding path program 1 times [2024-10-11 02:26:23,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:23,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109654937] [2024-10-11 02:26:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:26:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478908540] [2024-10-11 02:26:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:23,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:23,564 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 02:26:23,566 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 02:26:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:23,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 02:26:23,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:26:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:26:24,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:26:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:26:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109654937] [2024-10-11 02:26:26,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:26:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478908540] [2024-10-11 02:26:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478908540] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:26:26,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:26:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-10-11 02:26:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339121318] [2024-10-11 02:26:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:26:26,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:26:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:26:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:26:26,080 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:26:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:26,195 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-10-11 02:26:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:26:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-10-11 02:26:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:26,197 INFO L225 Difference]: With dead ends: 41 [2024-10-11 02:26:26,197 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 02:26:26,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:26:26,198 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:26,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 80 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:26:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 02:26:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-10-11 02:26:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:26:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-10-11 02:26:26,203 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2024-10-11 02:26:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:26,204 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-10-11 02:26:26,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:26:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-10-11 02:26:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 02:26:26,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:26,204 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:26,217 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 02:26:26,405 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 02:26:26,405 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:26,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:26,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1966236047, now seen corresponding path program 1 times [2024-10-11 02:26:26,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:26,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353242494] [2024-10-11 02:26:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:26:26,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672364978] [2024-10-11 02:26:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:26,430 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 02:26:26,431 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 02:26:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:26,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 02:26:26,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:26:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:26:26,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:26:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:26:27,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353242494] [2024-10-11 02:26:27,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:26:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672364978] [2024-10-11 02:26:27,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672364978] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:26:27,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:26:27,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2024-10-11 02:26:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105436944] [2024-10-11 02:26:27,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:26:27,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:26:27,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:26:27,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:26:27,013 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-11 02:26:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:27,499 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-10-11 02:26:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 02:26:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2024-10-11 02:26:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:27,500 INFO L225 Difference]: With dead ends: 66 [2024-10-11 02:26:27,500 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 02:26:27,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-11 02:26:27,501 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:27,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 122 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:26:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 02:26:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-11 02:26:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 43 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-11 02:26:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-10-11 02:26:27,514 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2024-10-11 02:26:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:27,514 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-10-11 02:26:27,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-11 02:26:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-10-11 02:26:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 02:26:27,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:27,515 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:27,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 02:26:27,716 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 02:26:27,716 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:27,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1307708752, now seen corresponding path program 1 times [2024-10-11 02:26:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894977287] [2024-10-11 02:26:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:26:27,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027897225] [2024-10-11 02:26:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:27,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:27,735 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 02:26:27,736 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 02:26:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:27,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 02:26:27,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:26:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 02:26:27,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:26:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 02:26:27,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:27,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894977287] [2024-10-11 02:26:27,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:26:27,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027897225] [2024-10-11 02:26:27,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027897225] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:26:27,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:26:27,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-10-11 02:26:27,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816682508] [2024-10-11 02:26:27,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:26:27,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:26:27,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:26:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:26:27,895 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:26:27,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:27,958 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2024-10-11 02:26:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 02:26:27,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2024-10-11 02:26:27,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:27,959 INFO L225 Difference]: With dead ends: 66 [2024-10-11 02:26:27,959 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 02:26:27,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:26:27,960 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:27,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:26:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 02:26:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2024-10-11 02:26:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-11 02:26:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-10-11 02:26:27,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 38 [2024-10-11 02:26:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:27,969 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-10-11 02:26:27,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:26:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-10-11 02:26:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 02:26:27,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:27,970 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:27,982 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 02:26:28,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 02:26:28,175 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:28,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1005394556, now seen corresponding path program 1 times [2024-10-11 02:26:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457060403] [2024-10-11 02:26:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:26:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917767660] [2024-10-11 02:26:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:28,195 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 02:26:28,197 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 02:26:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:26:28,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 02:26:28,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:26:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-11 02:26:29,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:26:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-11 02:26:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457060403] [2024-10-11 02:26:30,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:26:30,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917767660] [2024-10-11 02:26:30,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917767660] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:26:30,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:26:30,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-10-11 02:26:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225903134] [2024-10-11 02:26:30,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:26:30,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 02:26:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 02:26:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:26:30,929 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-11 02:26:34,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:26:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:26:36,379 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2024-10-11 02:26:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 02:26:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2024-10-11 02:26:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:26:36,385 INFO L225 Difference]: With dead ends: 95 [2024-10-11 02:26:36,385 INFO L226 Difference]: Without dead ends: 93 [2024-10-11 02:26:36,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2024-10-11 02:26:36,390 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:26:36,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 188 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-11 02:26:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-11 02:26:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-11 02:26:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 71 states have internal predecessors, (82), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:26:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2024-10-11 02:26:36,414 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 41 [2024-10-11 02:26:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:26:36,416 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2024-10-11 02:26:36,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-11 02:26:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2024-10-11 02:26:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 02:26:36,418 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:26:36,418 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:26:36,433 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 02:26:36,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:36,618 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:26:36,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:26:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1142689690, now seen corresponding path program 2 times [2024-10-11 02:26:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:26:36,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936608205] [2024-10-11 02:26:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:26:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:26:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:26:36,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609343667] [2024-10-11 02:26:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:26:36,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:26:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:26:36,671 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 02:26:36,672 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 02:26:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:26:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:26:36,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 02:26:36,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:26:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 02:26:42,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:26:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:26:48,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:26:48,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936608205] [2024-10-11 02:26:48,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:26:48,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609343667] [2024-10-11 02:26:48,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609343667] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:26:48,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:26:48,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2024-10-11 02:26:48,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784958942] [2024-10-11 02:26:48,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:26:48,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 02:26:48,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:26:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 02:26:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:26:48,027 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-11 02:27:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:01,629 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2024-10-11 02:27:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 02:27:01,629 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 59 [2024-10-11 02:27:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:01,630 INFO L225 Difference]: With dead ends: 140 [2024-10-11 02:27:01,630 INFO L226 Difference]: Without dead ends: 138 [2024-10-11 02:27:01,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 02:27:01,631 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:01,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 211 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-11 02:27:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-11 02:27:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-10-11 02:27:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 105 states have (on average 1.180952380952381) internal successors, (124), 108 states have internal predecessors, (124), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-11 02:27:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 172 transitions. [2024-10-11 02:27:01,656 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 172 transitions. Word has length 59 [2024-10-11 02:27:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:01,657 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 172 transitions. [2024-10-11 02:27:01,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-11 02:27:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 172 transitions. [2024-10-11 02:27:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 02:27:01,658 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:01,658 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:01,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 02:27:01,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 02:27:01,863 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:01,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash -960744998, now seen corresponding path program 2 times [2024-10-11 02:27:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:01,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349164536] [2024-10-11 02:27:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:01,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:01,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312432500] [2024-10-11 02:27:01,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:27:01,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:01,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:27:01,901 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 02:27:01,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:27:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:27:01,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 02:27:01,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 02:27:02,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349164536] [2024-10-11 02:27:04,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:27:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312432500] [2024-10-11 02:27:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312432500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:27:04,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:27:04,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-11 02:27:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590135109] [2024-10-11 02:27:04,192 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:27:04,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 02:27:04,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 02:27:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:27:04,193 INFO L87 Difference]: Start difference. First operand 138 states and 172 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 02:27:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:04,680 INFO L93 Difference]: Finished difference Result 150 states and 185 transitions. [2024-10-11 02:27:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 02:27:04,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2024-10-11 02:27:04,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:04,682 INFO L225 Difference]: With dead ends: 150 [2024-10-11 02:27:04,682 INFO L226 Difference]: Without dead ends: 148 [2024-10-11 02:27:04,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2024-10-11 02:27:04,683 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:04,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 232 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:27:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-11 02:27:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2024-10-11 02:27:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 114 states have internal predecessors, (129), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-11 02:27:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 179 transitions. [2024-10-11 02:27:04,705 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 179 transitions. Word has length 59 [2024-10-11 02:27:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:04,705 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 179 transitions. [2024-10-11 02:27:04,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 02:27:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 179 transitions. [2024-10-11 02:27:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-11 02:27:04,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:04,707 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:04,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 02:27:04,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:04,908 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:04,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash 450208273, now seen corresponding path program 3 times [2024-10-11 02:27:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:04,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820376165] [2024-10-11 02:27:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:04,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127082419] [2024-10-11 02:27:04,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:27:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:04,955 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 02:27:04,956 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 02:27:05,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-11 02:27:05,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:27:05,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 02:27:05,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-11 02:27:05,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:27:06,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:27:06,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820376165] [2024-10-11 02:27:06,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:27:06,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127082419] [2024-10-11 02:27:06,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127082419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:27:06,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:27:06,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-11 02:27:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994898719] [2024-10-11 02:27:06,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:27:06,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 02:27:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:27:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 02:27:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:27:06,877 INFO L87 Difference]: Start difference. First operand 145 states and 179 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-11 02:27:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:27:07,692 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2024-10-11 02:27:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 02:27:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 68 [2024-10-11 02:27:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:27:07,695 INFO L225 Difference]: With dead ends: 186 [2024-10-11 02:27:07,695 INFO L226 Difference]: Without dead ends: 184 [2024-10-11 02:27:07,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-10-11 02:27:07,696 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 02:27:07,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 334 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 02:27:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-11 02:27:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2024-10-11 02:27:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 138 states have (on average 1.173913043478261) internal successors, (162), 143 states have internal predecessors, (162), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 26 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-11 02:27:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2024-10-11 02:27:07,722 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 68 [2024-10-11 02:27:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:27:07,723 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2024-10-11 02:27:07,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-11 02:27:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2024-10-11 02:27:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-11 02:27:07,724 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:27:07,724 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:27:07,737 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 02:27:07,925 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,SelfDestructingSolverStorable9 [2024-10-11 02:27:07,925 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:27:07,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:27:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1793775025, now seen corresponding path program 3 times [2024-10-11 02:27:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:27:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004545111] [2024-10-11 02:27:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:27:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:27:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:27:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55478633] [2024-10-11 02:27:07,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:27:07,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:27:07,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:27:07,972 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 02:27:07,973 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 02:27:08,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 02:27:08,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:27:08,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 02:27:08,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:27:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-11 02:27:12,800 INFO L311 TraceCheckSpWp]: Computing backward predicates...