./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/relax-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 08:49:22,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 08:49:22,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 08:49:22,237 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 08:49:22,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 08:49:22,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 08:49:22,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 08:49:22,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 08:49:22,265 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 08:49:22,265 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 08:49:22,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 08:49:22,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 08:49:22,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 08:49:22,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 08:49:22,267 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 08:49:22,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 08:49:22,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 08:49:22,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 08:49:22,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 08:49:22,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 08:49:22,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 08:49:22,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 08:49:22,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 08:49:22,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 08:49:22,274 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 08:49:22,274 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 08:49:22,274 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 08:49:22,275 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 08:49:22,275 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 08:49:22,276 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 08:49:22,276 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 08:49:22,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 08:49:22,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 08:49:22,278 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 08:49:22,279 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 08:49:22,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 08:49:22,279 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 08:49:22,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 08:49:22,280 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-11-18 08:49:22,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 08:49:22,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 08:49:22,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 08:49:22,551 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 08:49:22,552 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 08:49:22,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-18 08:49:23,983 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 08:49:24,212 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 08:49:24,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-18 08:49:24,228 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557574c7b/2b4206fbbbd242598a97267e7193c55c/FLAGc2ac8621f [2024-11-18 08:49:24,547 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557574c7b/2b4206fbbbd242598a97267e7193c55c [2024-11-18 08:49:24,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 08:49:24,551 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 08:49:24,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 08:49:24,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 08:49:24,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 08:49:24,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33afbd7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24, skipping insertion in model container [2024-11-18 08:49:24,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,615 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 08:49:24,817 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-18 08:49:24,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 08:49:24,959 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 08:49:24,995 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-18 08:49:25,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 08:49:25,109 INFO L204 MainTranslator]: Completed translation [2024-11-18 08:49:25,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25 WrapperNode [2024-11-18 08:49:25,110 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 08:49:25,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 08:49:25,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 08:49:25,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 08:49:25,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,155 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 140 [2024-11-18 08:49:25,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 08:49:25,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 08:49:25,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 08:49:25,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 08:49:25,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,168 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,182 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-18 08:49:25,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,197 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,205 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 08:49:25,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 08:49:25,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 08:49:25,206 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 08:49:25,207 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (1/1) ... [2024-11-18 08:49:25,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 08:49:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:25,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 08:49:25,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 08:49:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 08:49:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 08:49:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-18 08:49:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-18 08:49:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 08:49:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 08:49:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 08:49:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 08:49:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 08:49:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 08:49:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 08:49:25,400 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 08:49:25,401 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 08:49:25,651 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-18 08:49:25,651 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 08:49:25,669 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 08:49:25,669 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-18 08:49:25,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:49:25 BoogieIcfgContainer [2024-11-18 08:49:25,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 08:49:25,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 08:49:25,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 08:49:25,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 08:49:25,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:49:24" (1/3) ... [2024-11-18 08:49:25,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf22d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:49:25, skipping insertion in model container [2024-11-18 08:49:25,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:25" (2/3) ... [2024-11-18 08:49:25,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf22d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:49:25, skipping insertion in model container [2024-11-18 08:49:25,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:49:25" (3/3) ... [2024-11-18 08:49:25,682 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-18 08:49:25,703 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 08:49:25,703 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 08:49:25,755 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 08:49:25,761 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;@4a7799d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 08:49:25,762 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 08:49:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 48 states have internal predecessors, (69), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 08:49:25,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:25,772 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:25,773 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:25,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 321674508, now seen corresponding path program 1 times [2024-11-18 08:49:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448806560] [2024-11-18 08:49:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 08:49:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:25,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448806560] [2024-11-18 08:49:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448806560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642811734] [2024-11-18 08:49:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:25,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:25,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 08:49:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:26,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-18 08:49:26,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 08:49:26,082 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 08:49:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642811734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:26,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 08:49:26,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-18 08:49:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143538550] [2024-11-18 08:49:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:26,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 08:49:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 08:49:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 08:49:26,116 INFO L87 Difference]: Start difference. First operand has 55 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 48 states have internal predecessors, (69), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 08:49:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:26,139 INFO L93 Difference]: Finished difference Result 107 states and 169 transitions. [2024-11-18 08:49:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 08:49:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-18 08:49:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:26,148 INFO L225 Difference]: With dead ends: 107 [2024-11-18 08:49:26,148 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 08:49:26,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 08:49:26,154 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:26,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 08:49:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-18 08:49:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 43 states have internal predecessors, (55), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 08:49:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-18 08:49:26,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 24 [2024-11-18 08:49:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:26,185 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-18 08:49:26,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 08:49:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-18 08:49:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 08:49:26,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:26,187 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:26,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 08:49:26,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-18 08:49:26,388 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:26,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:26,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1775837620, now seen corresponding path program 1 times [2024-11-18 08:49:26,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:26,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894312625] [2024-11-18 08:49:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:26,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:26,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894312625] [2024-11-18 08:49:26,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894312625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:26,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:26,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 08:49:26,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591410801] [2024-11-18 08:49:26,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:26,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 08:49:26,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 08:49:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:26,754 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:26,782 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2024-11-18 08:49:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 08:49:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-18 08:49:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:26,784 INFO L225 Difference]: With dead ends: 73 [2024-11-18 08:49:26,784 INFO L226 Difference]: Without dead ends: 51 [2024-11-18 08:49:26,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:26,785 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:26,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-18 08:49:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-18 08:49:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 08:49:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2024-11-18 08:49:26,795 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2024-11-18 08:49:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:26,798 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2024-11-18 08:49:26,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2024-11-18 08:49:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 08:49:26,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:26,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:26,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 08:49:26,801 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:26,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1388994825, now seen corresponding path program 1 times [2024-11-18 08:49:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:26,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761484668] [2024-11-18 08:49:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:26,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761484668] [2024-11-18 08:49:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761484668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:27,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:27,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 08:49:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199603494] [2024-11-18 08:49:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:27,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 08:49:27,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 08:49:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 08:49:27,172 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:27,298 INFO L93 Difference]: Finished difference Result 106 states and 144 transitions. [2024-11-18 08:49:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 08:49:27,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-18 08:49:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:27,301 INFO L225 Difference]: With dead ends: 106 [2024-11-18 08:49:27,301 INFO L226 Difference]: Without dead ends: 72 [2024-11-18 08:49:27,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 08:49:27,302 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:27,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 274 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-18 08:49:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-11-18 08:49:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 63 states have internal predecessors, (82), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 08:49:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2024-11-18 08:49:27,314 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 27 [2024-11-18 08:49:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:27,315 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2024-11-18 08:49:27,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2024-11-18 08:49:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 08:49:27,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:27,316 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:27,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 08:49:27,317 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:27,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash -835779302, now seen corresponding path program 1 times [2024-11-18 08:49:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:27,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242438715] [2024-11-18 08:49:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:27,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242438715] [2024-11-18 08:49:27,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242438715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:27,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:27,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 08:49:27,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348621252] [2024-11-18 08:49:27,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:27,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 08:49:27,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 08:49:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:27,511 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:27,608 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2024-11-18 08:49:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 08:49:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-18 08:49:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:27,610 INFO L225 Difference]: With dead ends: 86 [2024-11-18 08:49:27,610 INFO L226 Difference]: Without dead ends: 67 [2024-11-18 08:49:27,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 08:49:27,611 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 16 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:27,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 228 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-18 08:49:27,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-18 08:49:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 60 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 08:49:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2024-11-18 08:49:27,627 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 28 [2024-11-18 08:49:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:27,627 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2024-11-18 08:49:27,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2024-11-18 08:49:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-18 08:49:27,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:27,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:27,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 08:49:27,630 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:27,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 339592345, now seen corresponding path program 1 times [2024-11-18 08:49:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765241584] [2024-11-18 08:49:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:27,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:28,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765241584] [2024-11-18 08:49:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765241584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018495307] [2024-11-18 08:49:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:28,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:28,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:28,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 08:49:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:28,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 08:49:28,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:28,384 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 08:49:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018495307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:28,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 08:49:28,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2024-11-18 08:49:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394718500] [2024-11-18 08:49:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:28,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 08:49:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 08:49:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-18 08:49:28,389 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:28,514 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-11-18 08:49:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 08:49:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-18 08:49:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:28,517 INFO L225 Difference]: With dead ends: 76 [2024-11-18 08:49:28,518 INFO L226 Difference]: Without dead ends: 74 [2024-11-18 08:49:28,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-18 08:49:28,520 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 38 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:28,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 218 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-18 08:49:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-11-18 08:49:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.305084745762712) internal successors, (77), 63 states have internal predecessors, (77), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 08:49:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2024-11-18 08:49:28,535 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 29 [2024-11-18 08:49:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:28,535 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2024-11-18 08:49:28,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2024-11-18 08:49:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-18 08:49:28,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:28,542 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:28,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 08:49:28,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:28,746 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:28,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1208968374, now seen corresponding path program 1 times [2024-11-18 08:49:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700501339] [2024-11-18 08:49:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:28,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:29,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700501339] [2024-11-18 08:49:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700501339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174005898] [2024-11-18 08:49:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:29,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:29,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:29,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 08:49:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:29,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 08:49:29,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:29,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174005898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:29,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14] total 26 [2024-11-18 08:49:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12621068] [2024-11-18 08:49:29,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:29,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 08:49:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 08:49:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-11-18 08:49:29,865 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:30,868 INFO L93 Difference]: Finished difference Result 221 states and 299 transitions. [2024-11-18 08:49:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-18 08:49:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-18 08:49:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:30,870 INFO L225 Difference]: With dead ends: 221 [2024-11-18 08:49:30,870 INFO L226 Difference]: Without dead ends: 164 [2024-11-18 08:49:30,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 08:49:30,872 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 276 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:30,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 923 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 08:49:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-18 08:49:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2024-11-18 08:49:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.3267326732673268) internal successors, (134), 105 states have internal predecessors, (134), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2024-11-18 08:49:30,891 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 30 [2024-11-18 08:49:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:30,893 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2024-11-18 08:49:30,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2024-11-18 08:49:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-18 08:49:30,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:30,896 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:30,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:31,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:31,098 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:31,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1229420613, now seen corresponding path program 1 times [2024-11-18 08:49:31,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:31,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154584865] [2024-11-18 08:49:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:31,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:31,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:31,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154584865] [2024-11-18 08:49:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154584865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:31,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 08:49:31,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607067002] [2024-11-18 08:49:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:31,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 08:49:31,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 08:49:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:31,162 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:31,187 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2024-11-18 08:49:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 08:49:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-18 08:49:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:31,189 INFO L225 Difference]: With dead ends: 138 [2024-11-18 08:49:31,189 INFO L226 Difference]: Without dead ends: 101 [2024-11-18 08:49:31,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:31,190 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:31,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-18 08:49:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-18 08:49:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 93 states have internal predecessors, (117), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2024-11-18 08:49:31,204 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 31 [2024-11-18 08:49:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:31,205 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2024-11-18 08:49:31,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2024-11-18 08:49:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-18 08:49:31,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:31,207 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:31,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-18 08:49:31,207 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:31,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1970064746, now seen corresponding path program 1 times [2024-11-18 08:49:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544856940] [2024-11-18 08:49:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:31,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:31,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:31,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544856940] [2024-11-18 08:49:31,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544856940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205115250] [2024-11-18 08:49:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:31,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:31,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:31,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:31,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 08:49:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:31,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 08:49:31,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:31,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:31,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205115250] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:31,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-18 08:49:31,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 12 [2024-11-18 08:49:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414537626] [2024-11-18 08:49:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:31,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 08:49:31,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 08:49:31,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-18 08:49:31,677 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:31,750 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2024-11-18 08:49:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 08:49:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-18 08:49:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:31,752 INFO L225 Difference]: With dead ends: 123 [2024-11-18 08:49:31,752 INFO L226 Difference]: Without dead ends: 114 [2024-11-18 08:49:31,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-18 08:49:31,753 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:31,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 157 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-18 08:49:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 103. [2024-11-18 08:49:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 95 states have internal predecessors, (119), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2024-11-18 08:49:31,772 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 32 [2024-11-18 08:49:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:31,774 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2024-11-18 08:49:31,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2024-11-18 08:49:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-18 08:49:31,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:31,775 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:31,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 08:49:31,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:31,976 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:31,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash 891470804, now seen corresponding path program 2 times [2024-11-18 08:49:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809540262] [2024-11-18 08:49:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:32,001 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-18 08:49:32,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:32,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:32,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809540262] [2024-11-18 08:49:32,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809540262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:32,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:32,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 08:49:32,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450965877] [2024-11-18 08:49:32,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:32,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 08:49:32,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 08:49:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:32,156 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:32,237 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2024-11-18 08:49:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 08:49:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-18 08:49:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:32,240 INFO L225 Difference]: With dead ends: 132 [2024-11-18 08:49:32,240 INFO L226 Difference]: Without dead ends: 123 [2024-11-18 08:49:32,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:32,242 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 13 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:32,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 195 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-18 08:49:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2024-11-18 08:49:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 88 states have internal predecessors, (110), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2024-11-18 08:49:32,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 32 [2024-11-18 08:49:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:32,258 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2024-11-18 08:49:32,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2024-11-18 08:49:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 08:49:32,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:32,259 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:32,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-18 08:49:32,259 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:32,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash -725981085, now seen corresponding path program 1 times [2024-11-18 08:49:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003455311] [2024-11-18 08:49:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:32,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:32,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003455311] [2024-11-18 08:49:32,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003455311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:32,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:32,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 08:49:32,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183099918] [2024-11-18 08:49:32,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:32,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 08:49:32,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:32,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 08:49:32,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 08:49:32,302 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:32,326 INFO L93 Difference]: Finished difference Result 135 states and 177 transitions. [2024-11-18 08:49:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 08:49:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-18 08:49:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:32,328 INFO L225 Difference]: With dead ends: 135 [2024-11-18 08:49:32,328 INFO L226 Difference]: Without dead ends: 99 [2024-11-18 08:49:32,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 08:49:32,329 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:32,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 125 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-18 08:49:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-18 08:49:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3333333333333333) internal successors, (116), 91 states have internal predecessors, (116), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2024-11-18 08:49:32,342 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 33 [2024-11-18 08:49:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:32,342 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2024-11-18 08:49:32,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2024-11-18 08:49:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-18 08:49:32,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:32,343 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:32,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-18 08:49:32,344 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:32,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash -465282231, now seen corresponding path program 1 times [2024-11-18 08:49:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:32,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974517509] [2024-11-18 08:49:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:32,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974517509] [2024-11-18 08:49:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974517509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068860139] [2024-11-18 08:49:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:32,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:32,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:32,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:32,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 08:49:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:32,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 08:49:32,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:33,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:33,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068860139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:33,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:33,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 28 [2024-11-18 08:49:33,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083058224] [2024-11-18 08:49:33,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:33,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 08:49:33,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:33,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 08:49:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-18 08:49:33,669 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:34,903 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2024-11-18 08:49:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-18 08:49:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-11-18 08:49:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:34,905 INFO L225 Difference]: With dead ends: 303 [2024-11-18 08:49:34,905 INFO L226 Difference]: Without dead ends: 287 [2024-11-18 08:49:34,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2024-11-18 08:49:34,907 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 543 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:34,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 885 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 08:49:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-18 08:49:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 125. [2024-11-18 08:49:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 113 states have (on average 1.3539823008849559) internal successors, (153), 117 states have internal predecessors, (153), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2024-11-18 08:49:34,936 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 35 [2024-11-18 08:49:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:34,936 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2024-11-18 08:49:34,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2024-11-18 08:49:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-18 08:49:34,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:34,937 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:34,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:35,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-18 08:49:35,138 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:35,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash 220050185, now seen corresponding path program 1 times [2024-11-18 08:49:35,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:35,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14072006] [2024-11-18 08:49:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:35,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14072006] [2024-11-18 08:49:35,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14072006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:35,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:35,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 08:49:35,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379581030] [2024-11-18 08:49:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:35,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 08:49:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 08:49:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:35,238 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:35,298 INFO L93 Difference]: Finished difference Result 187 states and 250 transitions. [2024-11-18 08:49:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 08:49:35,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-11-18 08:49:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:35,302 INFO L225 Difference]: With dead ends: 187 [2024-11-18 08:49:35,302 INFO L226 Difference]: Without dead ends: 145 [2024-11-18 08:49:35,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:35,303 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:35,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 197 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-18 08:49:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2024-11-18 08:49:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.3461538461538463) internal successors, (175), 134 states have internal predecessors, (175), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2024-11-18 08:49:35,328 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 35 [2024-11-18 08:49:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:35,329 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2024-11-18 08:49:35,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2024-11-18 08:49:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 08:49:35,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:35,330 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:35,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-18 08:49:35,331 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:35,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:35,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1134920389, now seen corresponding path program 1 times [2024-11-18 08:49:35,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:35,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633191062] [2024-11-18 08:49:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:35,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:35,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633191062] [2024-11-18 08:49:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633191062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683857811] [2024-11-18 08:49:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:35,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:35,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 08:49:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:35,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 08:49:35,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:36,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:36,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683857811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:36,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:36,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2024-11-18 08:49:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444550385] [2024-11-18 08:49:36,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:36,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-18 08:49:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-18 08:49:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-11-18 08:49:36,394 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:36,984 INFO L93 Difference]: Finished difference Result 173 states and 228 transitions. [2024-11-18 08:49:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 08:49:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-18 08:49:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:36,985 INFO L225 Difference]: With dead ends: 173 [2024-11-18 08:49:36,985 INFO L226 Difference]: Without dead ends: 147 [2024-11-18 08:49:36,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2024-11-18 08:49:36,987 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 50 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:36,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1148 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 08:49:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-18 08:49:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2024-11-18 08:49:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.3421052631578947) internal successors, (153), 118 states have internal predecessors, (153), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 168 transitions. [2024-11-18 08:49:37,001 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 168 transitions. Word has length 39 [2024-11-18 08:49:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:37,001 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 168 transitions. [2024-11-18 08:49:37,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 168 transitions. [2024-11-18 08:49:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 08:49:37,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:37,003 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:37,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:37,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:37,204 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:37,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1504028083, now seen corresponding path program 2 times [2024-11-18 08:49:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:37,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320895916] [2024-11-18 08:49:37,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:37,225 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-18 08:49:37,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 08:49:37,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:37,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320895916] [2024-11-18 08:49:37,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320895916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:37,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:37,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 08:49:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699664046] [2024-11-18 08:49:37,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:37,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 08:49:37,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 08:49:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:37,420 INFO L87 Difference]: Start difference. First operand 126 states and 168 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:37,508 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2024-11-18 08:49:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 08:49:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-18 08:49:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:37,509 INFO L225 Difference]: With dead ends: 144 [2024-11-18 08:49:37,509 INFO L226 Difference]: Without dead ends: 128 [2024-11-18 08:49:37,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:37,510 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:37,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 201 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-18 08:49:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2024-11-18 08:49:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.33) internal successors, (133), 104 states have internal predecessors, (133), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2024-11-18 08:49:37,524 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 39 [2024-11-18 08:49:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:37,524 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2024-11-18 08:49:37,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2024-11-18 08:49:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-18 08:49:37,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:37,525 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:37,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-18 08:49:37,525 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:37,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -850016227, now seen corresponding path program 1 times [2024-11-18 08:49:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009128180] [2024-11-18 08:49:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:37,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:37,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009128180] [2024-11-18 08:49:37,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009128180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:37,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:37,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 08:49:37,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880512096] [2024-11-18 08:49:37,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:37,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 08:49:37,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:37,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 08:49:37,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:37,641 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:37,700 INFO L93 Difference]: Finished difference Result 123 states and 160 transitions. [2024-11-18 08:49:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 08:49:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-18 08:49:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:37,702 INFO L225 Difference]: With dead ends: 123 [2024-11-18 08:49:37,702 INFO L226 Difference]: Without dead ends: 114 [2024-11-18 08:49:37,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:37,703 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 29 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:37,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-18 08:49:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-11-18 08:49:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.3265306122448979) internal successors, (130), 102 states have internal predecessors, (130), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 145 transitions. [2024-11-18 08:49:37,717 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 145 transitions. Word has length 41 [2024-11-18 08:49:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:37,718 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 145 transitions. [2024-11-18 08:49:37,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 145 transitions. [2024-11-18 08:49:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-18 08:49:37,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:37,719 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:37,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-18 08:49:37,719 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:37,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1539771276, now seen corresponding path program 1 times [2024-11-18 08:49:37,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:37,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644939234] [2024-11-18 08:49:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:37,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:37,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:37,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644939234] [2024-11-18 08:49:37,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644939234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:37,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962016080] [2024-11-18 08:49:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:37,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:37,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:37,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:37,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 08:49:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:37,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-18 08:49:37,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 08:49:38,001 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 08:49:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962016080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 08:49:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2024-11-18 08:49:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665136767] [2024-11-18 08:49:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:38,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 08:49:38,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 08:49:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 08:49:38,003 INFO L87 Difference]: Start difference. First operand 110 states and 145 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-18 08:49:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:38,040 INFO L93 Difference]: Finished difference Result 135 states and 179 transitions. [2024-11-18 08:49:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 08:49:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 43 [2024-11-18 08:49:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:38,042 INFO L225 Difference]: With dead ends: 135 [2024-11-18 08:49:38,042 INFO L226 Difference]: Without dead ends: 117 [2024-11-18 08:49:38,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 08:49:38,044 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:38,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 118 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-18 08:49:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2024-11-18 08:49:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 106 states have internal predecessors, (136), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2024-11-18 08:49:38,062 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 43 [2024-11-18 08:49:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:38,063 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2024-11-18 08:49:38,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-18 08:49:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2024-11-18 08:49:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-18 08:49:38,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:38,064 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:38,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:38,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:38,269 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:38,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1835283646, now seen corresponding path program 1 times [2024-11-18 08:49:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265030454] [2024-11-18 08:49:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:38,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:38,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:38,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265030454] [2024-11-18 08:49:38,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265030454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:38,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742808438] [2024-11-18 08:49:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:38,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:38,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:38,582 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:38,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 08:49:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:38,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 08:49:38,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:38,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 08:49:38,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742808438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:38,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:38,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 22 [2024-11-18 08:49:38,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645540346] [2024-11-18 08:49:38,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:38,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 08:49:38,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 08:49:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-18 08:49:38,972 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:39,511 INFO L93 Difference]: Finished difference Result 268 states and 364 transitions. [2024-11-18 08:49:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 08:49:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-18 08:49:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:39,513 INFO L225 Difference]: With dead ends: 268 [2024-11-18 08:49:39,513 INFO L226 Difference]: Without dead ends: 190 [2024-11-18 08:49:39,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-11-18 08:49:39,514 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 170 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:39,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 927 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 08:49:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-18 08:49:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 122. [2024-11-18 08:49:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.309090909090909) internal successors, (144), 114 states have internal predecessors, (144), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 159 transitions. [2024-11-18 08:49:39,533 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 159 transitions. Word has length 42 [2024-11-18 08:49:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:39,534 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 159 transitions. [2024-11-18 08:49:39,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 159 transitions. [2024-11-18 08:49:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 08:49:39,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:39,535 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:39,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 08:49:39,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-18 08:49:39,736 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:39,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1104151072, now seen corresponding path program 1 times [2024-11-18 08:49:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:39,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842808526] [2024-11-18 08:49:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:49:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842808526] [2024-11-18 08:49:40,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842808526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232513071] [2024-11-18 08:49:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:40,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:40,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:40,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 08:49:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:40,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 08:49:40,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:40,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:41,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232513071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:41,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:41,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 13] total 33 [2024-11-18 08:49:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430255449] [2024-11-18 08:49:41,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:41,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-18 08:49:41,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-18 08:49:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 08:49:41,207 INFO L87 Difference]: Start difference. First operand 122 states and 159 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:42,540 INFO L93 Difference]: Finished difference Result 240 states and 314 transitions. [2024-11-18 08:49:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-18 08:49:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-18 08:49:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:42,543 INFO L225 Difference]: With dead ends: 240 [2024-11-18 08:49:42,543 INFO L226 Difference]: Without dead ends: 196 [2024-11-18 08:49:42,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 08:49:42,546 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 196 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:42,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1464 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 08:49:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-18 08:49:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2024-11-18 08:49:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 128 states have (on average 1.3046875) internal successors, (167), 133 states have internal predecessors, (167), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 184 transitions. [2024-11-18 08:49:42,571 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 184 transitions. Word has length 44 [2024-11-18 08:49:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:42,571 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 184 transitions. [2024-11-18 08:49:42,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 184 transitions. [2024-11-18 08:49:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 08:49:42,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:42,572 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:42,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:42,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-18 08:49:42,773 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:42,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 15627932, now seen corresponding path program 2 times [2024-11-18 08:49:42,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:42,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082592096] [2024-11-18 08:49:42,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:42,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:49:42,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082592096] [2024-11-18 08:49:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082592096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973646142] [2024-11-18 08:49:43,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:43,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:43,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:43,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 08:49:43,313 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:49:43,313 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:43,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 08:49:43,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:43,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973646142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:43,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-11-18 08:49:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016650351] [2024-11-18 08:49:43,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:43,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 08:49:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 08:49:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-18 08:49:43,537 INFO L87 Difference]: Start difference. First operand 142 states and 184 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:43,766 INFO L93 Difference]: Finished difference Result 213 states and 276 transitions. [2024-11-18 08:49:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 08:49:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-18 08:49:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:43,767 INFO L225 Difference]: With dead ends: 213 [2024-11-18 08:49:43,767 INFO L226 Difference]: Without dead ends: 144 [2024-11-18 08:49:43,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-18 08:49:43,768 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:43,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 637 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-18 08:49:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 119. [2024-11-18 08:49:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 105 states have (on average 1.2666666666666666) internal successors, (133), 110 states have internal predecessors, (133), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2024-11-18 08:49:43,786 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 44 [2024-11-18 08:49:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:43,787 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2024-11-18 08:49:43,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2024-11-18 08:49:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 08:49:43,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:43,788 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:43,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:43,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:43,989 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:43,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1511968994, now seen corresponding path program 1 times [2024-11-18 08:49:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:43,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339314410] [2024-11-18 08:49:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:43,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 08:49:44,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:44,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339314410] [2024-11-18 08:49:44,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339314410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:44,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015896531] [2024-11-18 08:49:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:44,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:44,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:44,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:44,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 08:49:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:44,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 08:49:44,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:44,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 08:49:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015896531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:44,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:44,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2024-11-18 08:49:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324066030] [2024-11-18 08:49:44,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:44,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 08:49:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 08:49:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-18 08:49:44,613 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:45,132 INFO L93 Difference]: Finished difference Result 267 states and 367 transitions. [2024-11-18 08:49:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 08:49:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-18 08:49:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:45,134 INFO L225 Difference]: With dead ends: 267 [2024-11-18 08:49:45,134 INFO L226 Difference]: Without dead ends: 248 [2024-11-18 08:49:45,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-18 08:49:45,135 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 190 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:45,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 754 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 08:49:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-18 08:49:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 136. [2024-11-18 08:49:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 122 states have (on average 1.2950819672131149) internal successors, (158), 127 states have internal predecessors, (158), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2024-11-18 08:49:45,157 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 44 [2024-11-18 08:49:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:45,157 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2024-11-18 08:49:45,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2024-11-18 08:49:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 08:49:45,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:45,158 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:45,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-18 08:49:45,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:45,363 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:45,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1510121952, now seen corresponding path program 2 times [2024-11-18 08:49:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:45,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561150366] [2024-11-18 08:49:45,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:45,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:45,383 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-18 08:49:45,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-18 08:49:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561150366] [2024-11-18 08:49:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561150366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:45,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:45,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 08:49:45,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25219006] [2024-11-18 08:49:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:45,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 08:49:45,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 08:49:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:45,512 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:45,622 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2024-11-18 08:49:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 08:49:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-18 08:49:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:45,624 INFO L225 Difference]: With dead ends: 182 [2024-11-18 08:49:45,625 INFO L226 Difference]: Without dead ends: 173 [2024-11-18 08:49:45,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:45,626 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:45,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-18 08:49:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2024-11-18 08:49:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 146 states have (on average 1.3013698630136987) internal successors, (190), 151 states have internal predecessors, (190), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 207 transitions. [2024-11-18 08:49:45,661 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 207 transitions. Word has length 44 [2024-11-18 08:49:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:45,662 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 207 transitions. [2024-11-18 08:49:45,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 207 transitions. [2024-11-18 08:49:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 08:49:45,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:45,663 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:45,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-18 08:49:45,663 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:45,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:45,664 INFO L85 PathProgramCache]: Analyzing trace with hash -831910624, now seen corresponding path program 1 times [2024-11-18 08:49:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:45,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579589947] [2024-11-18 08:49:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:45,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:46,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:46,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579589947] [2024-11-18 08:49:46,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579589947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490868183] [2024-11-18 08:49:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:46,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:46,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:46,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:46,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 08:49:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:46,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-18 08:49:46,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:46,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 08:49:46,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-18 08:49:46,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-18 08:49:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:46,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:46,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:49:46,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-18 08:49:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490868183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:46,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:46,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-11-18 08:49:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056275310] [2024-11-18 08:49:46,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:46,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-18 08:49:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-18 08:49:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2024-11-18 08:49:46,954 INFO L87 Difference]: Start difference. First operand 160 states and 207 transitions. Second operand has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:47,768 INFO L93 Difference]: Finished difference Result 305 states and 405 transitions. [2024-11-18 08:49:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 08:49:47,768 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-18 08:49:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:47,770 INFO L225 Difference]: With dead ends: 305 [2024-11-18 08:49:47,770 INFO L226 Difference]: Without dead ends: 256 [2024-11-18 08:49:47,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 08:49:47,771 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 216 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:47,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1226 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 08:49:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-18 08:49:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 179. [2024-11-18 08:49:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 165 states have (on average 1.303030303030303) internal successors, (215), 170 states have internal predecessors, (215), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 232 transitions. [2024-11-18 08:49:47,815 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 232 transitions. Word has length 44 [2024-11-18 08:49:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:47,815 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 232 transitions. [2024-11-18 08:49:47,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 232 transitions. [2024-11-18 08:49:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-18 08:49:47,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:47,816 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:47,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:48,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-18 08:49:48,017 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:48,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash 82184506, now seen corresponding path program 3 times [2024-11-18 08:49:48,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:48,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522576508] [2024-11-18 08:49:48,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:49:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:48,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-18 08:49:48,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 08:49:48,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522576508] [2024-11-18 08:49:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522576508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:48,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680124264] [2024-11-18 08:49:48,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:49:48,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:48,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:48,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:48,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 08:49:48,799 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-18 08:49:48,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:48,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 08:49:48,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 08:49:48,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 08:49:49,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680124264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:49,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:49,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-18 08:49:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358661550] [2024-11-18 08:49:49,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:49,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 08:49:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 08:49:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-18 08:49:49,144 INFO L87 Difference]: Start difference. First operand 179 states and 232 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:49,870 INFO L93 Difference]: Finished difference Result 308 states and 416 transitions. [2024-11-18 08:49:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 08:49:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-18 08:49:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:49,873 INFO L225 Difference]: With dead ends: 308 [2024-11-18 08:49:49,873 INFO L226 Difference]: Without dead ends: 299 [2024-11-18 08:49:49,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 08:49:49,874 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 197 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:49,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 691 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 08:49:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-18 08:49:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 184. [2024-11-18 08:49:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 170 states have (on average 1.3058823529411765) internal successors, (222), 175 states have internal predecessors, (222), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 239 transitions. [2024-11-18 08:49:49,912 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 239 transitions. Word has length 46 [2024-11-18 08:49:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:49,912 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 239 transitions. [2024-11-18 08:49:49,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 239 transitions. [2024-11-18 08:49:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-18 08:49:49,913 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:49,913 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:49,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:50,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-18 08:49:50,114 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:50,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1395635422, now seen corresponding path program 1 times [2024-11-18 08:49:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146641325] [2024-11-18 08:49:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 08:49:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:50,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146641325] [2024-11-18 08:49:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146641325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:50,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 08:49:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564386260] [2024-11-18 08:49:50,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:50,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 08:49:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 08:49:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:50,164 INFO L87 Difference]: Start difference. First operand 184 states and 239 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-18 08:49:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:50,222 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2024-11-18 08:49:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 08:49:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 48 [2024-11-18 08:49:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:50,225 INFO L225 Difference]: With dead ends: 204 [2024-11-18 08:49:50,225 INFO L226 Difference]: Without dead ends: 185 [2024-11-18 08:49:50,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 08:49:50,226 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:50,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-18 08:49:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2024-11-18 08:49:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 169 states have (on average 1.2958579881656804) internal successors, (219), 173 states have internal predecessors, (219), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 236 transitions. [2024-11-18 08:49:50,264 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 236 transitions. Word has length 48 [2024-11-18 08:49:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:50,264 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 236 transitions. [2024-11-18 08:49:50,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-18 08:49:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 236 transitions. [2024-11-18 08:49:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-18 08:49:50,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:50,268 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:50,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-18 08:49:50,268 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:50,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1402732040, now seen corresponding path program 1 times [2024-11-18 08:49:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:50,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806793724] [2024-11-18 08:49:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 08:49:50,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:50,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806793724] [2024-11-18 08:49:50,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806793724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:50,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685240155] [2024-11-18 08:49:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:50,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:50,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:50,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:50,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 08:49:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:50,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 08:49:50,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 08:49:50,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 08:49:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685240155] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:50,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-18 08:49:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888797794] [2024-11-18 08:49:50,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:50,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 08:49:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 08:49:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-18 08:49:50,735 INFO L87 Difference]: Start difference. First operand 183 states and 236 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-18 08:49:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:51,014 INFO L93 Difference]: Finished difference Result 223 states and 288 transitions. [2024-11-18 08:49:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 08:49:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2024-11-18 08:49:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:51,016 INFO L225 Difference]: With dead ends: 223 [2024-11-18 08:49:51,016 INFO L226 Difference]: Without dead ends: 157 [2024-11-18 08:49:51,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-18 08:49:51,017 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:51,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 682 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 08:49:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-18 08:49:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 149. [2024-11-18 08:49:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.3211678832116789) internal successors, (181), 140 states have internal predecessors, (181), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 196 transitions. [2024-11-18 08:49:51,044 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 196 transitions. Word has length 51 [2024-11-18 08:49:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:51,045 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 196 transitions. [2024-11-18 08:49:51,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-18 08:49:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 196 transitions. [2024-11-18 08:49:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 08:49:51,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:51,046 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:51,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 08:49:51,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:51,250 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:51,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2023125450, now seen corresponding path program 1 times [2024-11-18 08:49:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141926538] [2024-11-18 08:49:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 08:49:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141926538] [2024-11-18 08:49:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141926538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940322613] [2024-11-18 08:49:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:51,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:51,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 08:49:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:51,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 08:49:51,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:51,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:49:52,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940322613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:52,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:52,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-18 08:49:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659155317] [2024-11-18 08:49:52,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:52,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 08:49:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 08:49:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-18 08:49:52,014 INFO L87 Difference]: Start difference. First operand 149 states and 196 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:52,801 INFO L93 Difference]: Finished difference Result 450 states and 608 transitions. [2024-11-18 08:49:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-18 08:49:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2024-11-18 08:49:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:52,804 INFO L225 Difference]: With dead ends: 450 [2024-11-18 08:49:52,804 INFO L226 Difference]: Without dead ends: 382 [2024-11-18 08:49:52,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 08:49:52,805 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 213 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:52,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1048 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 08:49:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-18 08:49:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 213. [2024-11-18 08:49:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 200 states have (on average 1.33) internal successors, (266), 203 states have internal predecessors, (266), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 283 transitions. [2024-11-18 08:49:52,847 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 283 transitions. Word has length 49 [2024-11-18 08:49:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:52,847 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 283 transitions. [2024-11-18 08:49:52,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 283 transitions. [2024-11-18 08:49:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 08:49:52,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:52,848 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:52,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:53,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-18 08:49:53,053 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:53,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -87216089, now seen corresponding path program 1 times [2024-11-18 08:49:53,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:53,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136327895] [2024-11-18 08:49:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:53,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:53,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:53,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136327895] [2024-11-18 08:49:53,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136327895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:53,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261826614] [2024-11-18 08:49:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:53,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:53,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:54,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:54,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 08:49:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:54,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-18 08:49:54,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:54,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 08:49:54,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-18 08:49:54,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-18 08:49:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:49:54,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:54,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:49:54,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-18 08:49:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 08:49:54,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261826614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:54,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:54,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 38 [2024-11-18 08:49:54,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092954288] [2024-11-18 08:49:54,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:54,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-18 08:49:54,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-18 08:49:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 08:49:54,844 INFO L87 Difference]: Start difference. First operand 213 states and 283 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:55,430 INFO L93 Difference]: Finished difference Result 387 states and 512 transitions. [2024-11-18 08:49:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 08:49:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2024-11-18 08:49:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:55,432 INFO L225 Difference]: With dead ends: 387 [2024-11-18 08:49:55,432 INFO L226 Difference]: Without dead ends: 267 [2024-11-18 08:49:55,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 08:49:55,433 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 100 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:55,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 920 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 08:49:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-18 08:49:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2024-11-18 08:49:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 224 states have (on average 1.3125) internal successors, (294), 227 states have internal predecessors, (294), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 08:49:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 311 transitions. [2024-11-18 08:49:55,478 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 311 transitions. Word has length 49 [2024-11-18 08:49:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:55,478 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 311 transitions. [2024-11-18 08:49:55,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:49:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 311 transitions. [2024-11-18 08:49:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-18 08:49:55,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:55,480 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:55,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:55,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-18 08:49:55,681 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:55,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -679858682, now seen corresponding path program 1 times [2024-11-18 08:49:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938202427] [2024-11-18 08:49:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:49:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:55,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938202427] [2024-11-18 08:49:55,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938202427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:55,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832672165] [2024-11-18 08:49:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:55,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:55,871 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:55,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-18 08:49:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:55,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 08:49:55,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 08:49:56,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:49:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832672165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:56,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:56,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-18 08:49:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323585538] [2024-11-18 08:49:56,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:56,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 08:49:56,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 08:49:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-18 08:49:56,204 INFO L87 Difference]: Start difference. First operand 237 states and 311 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 08:49:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:56,491 INFO L93 Difference]: Finished difference Result 318 states and 415 transitions. [2024-11-18 08:49:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 08:49:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-11-18 08:49:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:56,493 INFO L225 Difference]: With dead ends: 318 [2024-11-18 08:49:56,493 INFO L226 Difference]: Without dead ends: 264 [2024-11-18 08:49:56,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-18 08:49:56,494 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:56,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 453 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 08:49:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-18 08:49:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2024-11-18 08:49:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.3073394495412844) internal successors, (285), 221 states have internal predecessors, (285), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 300 transitions. [2024-11-18 08:49:56,539 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 300 transitions. Word has length 54 [2024-11-18 08:49:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:56,540 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 300 transitions. [2024-11-18 08:49:56,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 08:49:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 300 transitions. [2024-11-18 08:49:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-18 08:49:56,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:56,541 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:56,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-18 08:49:56,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-18 08:49:56,742 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:56,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -710883729, now seen corresponding path program 1 times [2024-11-18 08:49:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:56,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682650115] [2024-11-18 08:49:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 08:49:57,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:57,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682650115] [2024-11-18 08:49:57,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682650115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:57,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486751852] [2024-11-18 08:49:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:57,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:49:57,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-18 08:49:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:57,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-18 08:49:57,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:57,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 08:49:57,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 08:49:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 08:49:57,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:57,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:49:57,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2024-11-18 08:49:57,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:49:57,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-18 08:49:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 08:49:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486751852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:58,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:58,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 30 [2024-11-18 08:49:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501839250] [2024-11-18 08:49:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:58,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 08:49:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 08:49:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-11-18 08:49:58,039 INFO L87 Difference]: Start difference. First operand 230 states and 300 transitions. Second operand has 30 states, 30 states have (on average 3.0) internal successors, (90), 29 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 08:49:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:59,714 INFO L93 Difference]: Finished difference Result 651 states and 871 transitions. [2024-11-18 08:49:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-18 08:49:59,715 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 29 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-18 08:49:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:59,717 INFO L225 Difference]: With dead ends: 651 [2024-11-18 08:49:59,718 INFO L226 Difference]: Without dead ends: 488 [2024-11-18 08:49:59,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=394, Invalid=2576, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 08:49:59,721 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:59,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1081 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 08:49:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-18 08:49:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 264. [2024-11-18 08:49:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 252 states have (on average 1.3095238095238095) internal successors, (330), 255 states have internal predecessors, (330), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 08:49:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 345 transitions. [2024-11-18 08:49:59,819 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 345 transitions. Word has length 52 [2024-11-18 08:49:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:59,819 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 345 transitions. [2024-11-18 08:49:59,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 29 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 08:49:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 345 transitions. [2024-11-18 08:49:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 08:49:59,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:59,821 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:59,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-18 08:50:00,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-18 08:50:00,021 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:00,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash 962348646, now seen corresponding path program 1 times [2024-11-18 08:50:00,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:00,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302688213] [2024-11-18 08:50:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:50:00,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:50:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:50:00,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302688213] [2024-11-18 08:50:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302688213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:00,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896673150] [2024-11-18 08:50:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:50:00,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:00,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:00,557 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:00,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-18 08:50:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:50:00,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 08:50:00,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 08:50:01,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 08:50:01,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896673150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:01,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 34 [2024-11-18 08:50:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767572115] [2024-11-18 08:50:01,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:01,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-18 08:50:01,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-18 08:50:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 08:50:01,383 INFO L87 Difference]: Start difference. First operand 264 states and 345 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-18 08:50:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:04,049 INFO L93 Difference]: Finished difference Result 584 states and 766 transitions. [2024-11-18 08:50:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-18 08:50:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2024-11-18 08:50:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:04,052 INFO L225 Difference]: With dead ends: 584 [2024-11-18 08:50:04,052 INFO L226 Difference]: Without dead ends: 471 [2024-11-18 08:50:04,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=888, Invalid=7854, Unknown=0, NotChecked=0, Total=8742 [2024-11-18 08:50:04,055 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 486 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:04,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1401 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-18 08:50:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-18 08:50:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 291. [2024-11-18 08:50:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 277 states have (on average 1.259927797833935) internal successors, (349), 278 states have internal predecessors, (349), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 368 transitions. [2024-11-18 08:50:04,125 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 368 transitions. Word has length 56 [2024-11-18 08:50:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:04,125 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 368 transitions. [2024-11-18 08:50:04,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-18 08:50:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 368 transitions. [2024-11-18 08:50:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-18 08:50:04,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:04,127 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:04,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-18 08:50:04,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:04,331 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:04,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash -579590263, now seen corresponding path program 2 times [2024-11-18 08:50:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931213437] [2024-11-18 08:50:04,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:04,376 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:04,376 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 08:50:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:04,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931213437] [2024-11-18 08:50:04,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931213437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:04,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463723986] [2024-11-18 08:50:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:04,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:04,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-18 08:50:04,939 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:04,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:04,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 08:50:04,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 08:50:05,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 08:50:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463723986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:05,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2024-11-18 08:50:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45722796] [2024-11-18 08:50:05,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:05,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 08:50:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 08:50:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-18 08:50:05,287 INFO L87 Difference]: Start difference. First operand 291 states and 368 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:05,901 INFO L93 Difference]: Finished difference Result 381 states and 473 transitions. [2024-11-18 08:50:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 08:50:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-18 08:50:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:05,903 INFO L225 Difference]: With dead ends: 381 [2024-11-18 08:50:05,903 INFO L226 Difference]: Without dead ends: 301 [2024-11-18 08:50:05,904 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2024-11-18 08:50:05,904 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 103 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:05,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1208 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 08:50:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-18 08:50:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 247. [2024-11-18 08:50:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 233 states have (on average 1.2446351931330473) internal successors, (290), 234 states have internal predecessors, (290), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 309 transitions. [2024-11-18 08:50:05,968 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 309 transitions. Word has length 54 [2024-11-18 08:50:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:05,968 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 309 transitions. [2024-11-18 08:50:05,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 309 transitions. [2024-11-18 08:50:05,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-18 08:50:05,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:05,969 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:05,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-18 08:50:06,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-18 08:50:06,170 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:06,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2013657349, now seen corresponding path program 2 times [2024-11-18 08:50:06,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:06,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611802708] [2024-11-18 08:50:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:06,230 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:06,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:50:07,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611802708] [2024-11-18 08:50:07,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611802708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636066890] [2024-11-18 08:50:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:07,109 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:07,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-18 08:50:07,232 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:07,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:07,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-18 08:50:07,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:07,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 08:50:07,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-18 08:50:07,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-18 08:50:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:50:07,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:07,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:50:07,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-18 08:50:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 08:50:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636066890] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:07,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:07,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 33 [2024-11-18 08:50:07,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693349768] [2024-11-18 08:50:07,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:07,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-18 08:50:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-18 08:50:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 08:50:07,917 INFO L87 Difference]: Start difference. First operand 247 states and 309 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 08:50:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:08,725 INFO L93 Difference]: Finished difference Result 411 states and 526 transitions. [2024-11-18 08:50:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-18 08:50:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-11-18 08:50:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:08,727 INFO L225 Difference]: With dead ends: 411 [2024-11-18 08:50:08,727 INFO L226 Difference]: Without dead ends: 362 [2024-11-18 08:50:08,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2024-11-18 08:50:08,728 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 121 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:08,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1573 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 08:50:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-18 08:50:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 271. [2024-11-18 08:50:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 257 states have (on average 1.245136186770428) internal successors, (320), 258 states have internal predecessors, (320), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 339 transitions. [2024-11-18 08:50:08,793 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 339 transitions. Word has length 54 [2024-11-18 08:50:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:08,793 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 339 transitions. [2024-11-18 08:50:08,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 08:50:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 339 transitions. [2024-11-18 08:50:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 08:50:08,794 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:08,794 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:08,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-18 08:50:08,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:08,995 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:08,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash -533951995, now seen corresponding path program 4 times [2024-11-18 08:50:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:08,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739522931] [2024-11-18 08:50:08,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:50:08,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:09,015 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:50:09,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 08:50:09,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739522931] [2024-11-18 08:50:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739522931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120604279] [2024-11-18 08:50:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:50:09,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:09,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:09,172 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:09,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-18 08:50:09,296 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:50:09,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:09,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 08:50:09,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 08:50:09,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 08:50:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120604279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:09,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-18 08:50:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077362811] [2024-11-18 08:50:09,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:09,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 08:50:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 08:50:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-18 08:50:09,636 INFO L87 Difference]: Start difference. First operand 271 states and 339 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:10,004 INFO L93 Difference]: Finished difference Result 334 states and 409 transitions. [2024-11-18 08:50:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 08:50:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2024-11-18 08:50:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:10,005 INFO L225 Difference]: With dead ends: 334 [2024-11-18 08:50:10,006 INFO L226 Difference]: Without dead ends: 260 [2024-11-18 08:50:10,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-18 08:50:10,007 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 37 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:10,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1015 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 08:50:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-18 08:50:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 253. [2024-11-18 08:50:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 239 states have (on average 1.2343096234309623) internal successors, (295), 240 states have internal predecessors, (295), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 314 transitions. [2024-11-18 08:50:10,060 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 314 transitions. Word has length 55 [2024-11-18 08:50:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:10,060 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 314 transitions. [2024-11-18 08:50:10,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 314 transitions. [2024-11-18 08:50:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 08:50:10,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:10,061 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:10,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-18 08:50:10,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:10,262 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:10,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:10,262 INFO L85 PathProgramCache]: Analyzing trace with hash -339506009, now seen corresponding path program 3 times [2024-11-18 08:50:10,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:10,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312148301] [2024-11-18 08:50:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:50:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:10,311 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 08:50:10,311 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 08:50:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:10,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312148301] [2024-11-18 08:50:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312148301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:10,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291187881] [2024-11-18 08:50:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:50:10,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:10,924 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:10,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-18 08:50:11,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 08:50:11,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:11,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-18 08:50:11,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 08:50:11,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 08:50:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291187881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:11,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:11,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-11-18 08:50:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020044726] [2024-11-18 08:50:11,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:11,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 08:50:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 08:50:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2024-11-18 08:50:11,965 INFO L87 Difference]: Start difference. First operand 253 states and 314 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:12,870 INFO L93 Difference]: Finished difference Result 388 states and 492 transitions. [2024-11-18 08:50:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-18 08:50:12,870 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2024-11-18 08:50:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:12,872 INFO L225 Difference]: With dead ends: 388 [2024-11-18 08:50:12,872 INFO L226 Difference]: Without dead ends: 375 [2024-11-18 08:50:12,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2024-11-18 08:50:12,873 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 163 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:12,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1310 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 08:50:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-18 08:50:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 262. [2024-11-18 08:50:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 248 states have (on average 1.2379032258064515) internal successors, (307), 249 states have internal predecessors, (307), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 326 transitions. [2024-11-18 08:50:12,938 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 326 transitions. Word has length 56 [2024-11-18 08:50:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:12,938 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 326 transitions. [2024-11-18 08:50:12,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 326 transitions. [2024-11-18 08:50:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-18 08:50:12,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:12,939 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:12,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-18 08:50:13,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:13,140 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:13,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -634803204, now seen corresponding path program 2 times [2024-11-18 08:50:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408648254] [2024-11-18 08:50:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:13,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:13,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 08:50:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408648254] [2024-11-18 08:50:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408648254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:13,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48582510] [2024-11-18 08:50:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:13,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:13,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:13,369 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:13,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-18 08:50:13,515 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:13,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:13,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-18 08:50:13,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:50:13,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 08:50:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48582510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:14,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2024-11-18 08:50:14,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2151970] [2024-11-18 08:50:14,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:14,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-18 08:50:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-18 08:50:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2024-11-18 08:50:14,129 INFO L87 Difference]: Start difference. First operand 262 states and 326 transitions. Second operand has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 30 states have internal predecessors, (128), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:16,556 INFO L93 Difference]: Finished difference Result 794 states and 1015 transitions. [2024-11-18 08:50:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-18 08:50:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 30 states have internal predecessors, (128), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2024-11-18 08:50:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:16,559 INFO L225 Difference]: With dead ends: 794 [2024-11-18 08:50:16,559 INFO L226 Difference]: Without dead ends: 594 [2024-11-18 08:50:16,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=831, Invalid=7541, Unknown=0, NotChecked=0, Total=8372 [2024-11-18 08:50:16,562 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 238 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:16,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1508 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 08:50:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-11-18 08:50:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 478. [2024-11-18 08:50:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 464 states have (on average 1.269396551724138) internal successors, (589), 465 states have internal predecessors, (589), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 608 transitions. [2024-11-18 08:50:16,667 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 608 transitions. Word has length 58 [2024-11-18 08:50:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:16,667 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 608 transitions. [2024-11-18 08:50:16,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 30 states have internal predecessors, (128), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 08:50:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 608 transitions. [2024-11-18 08:50:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-18 08:50:16,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:16,669 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:16,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-18 08:50:16,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:16,870 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:16,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1518447808, now seen corresponding path program 1 times [2024-11-18 08:50:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:16,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112622981] [2024-11-18 08:50:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:50:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:50:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:50:17,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112622981] [2024-11-18 08:50:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112622981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839245706] [2024-11-18 08:50:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:50:17,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:17,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:17,091 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:17,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-18 08:50:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:50:17,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 08:50:17,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:50:17,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:50:17,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839245706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:17,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:17,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-11-18 08:50:17,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527502710] [2024-11-18 08:50:17,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:17,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 08:50:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 08:50:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-18 08:50:17,469 INFO L87 Difference]: Start difference. First operand 478 states and 608 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-18 08:50:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:17,776 INFO L93 Difference]: Finished difference Result 609 states and 770 transitions. [2024-11-18 08:50:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 08:50:17,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2024-11-18 08:50:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:17,778 INFO L225 Difference]: With dead ends: 609 [2024-11-18 08:50:17,778 INFO L226 Difference]: Without dead ends: 523 [2024-11-18 08:50:17,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-11-18 08:50:17,779 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 70 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:17,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 748 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 08:50:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2024-11-18 08:50:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 465. [2024-11-18 08:50:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 451 states have (on average 1.252771618625277) internal successors, (565), 452 states have internal predecessors, (565), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 584 transitions. [2024-11-18 08:50:17,899 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 584 transitions. Word has length 61 [2024-11-18 08:50:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:17,900 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 584 transitions. [2024-11-18 08:50:17,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-18 08:50:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 584 transitions. [2024-11-18 08:50:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-18 08:50:17,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:17,901 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:17,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-18 08:50:18,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-18 08:50:18,102 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:18,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 109992346, now seen corresponding path program 4 times [2024-11-18 08:50:18,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:18,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870010560] [2024-11-18 08:50:18,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:50:18,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:18,136 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:50:18,136 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 08:50:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:18,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870010560] [2024-11-18 08:50:18,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870010560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:18,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976681262] [2024-11-18 08:50:18,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:50:18,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:18,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:18,902 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:18,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-18 08:50:19,039 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:50:19,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:19,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-18 08:50:19,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:19,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 08:50:19,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-18 08:50:19,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-18 08:50:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 08:50:19,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:20,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:50:20,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-18 08:50:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 08:50:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976681262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:20,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:20,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 17] total 52 [2024-11-18 08:50:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740491650] [2024-11-18 08:50:20,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:20,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-18 08:50:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:20,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-18 08:50:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2024-11-18 08:50:20,410 INFO L87 Difference]: Start difference. First operand 465 states and 584 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 50 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 08:50:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:22,762 INFO L93 Difference]: Finished difference Result 876 states and 1106 transitions. [2024-11-18 08:50:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-18 08:50:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 50 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-18 08:50:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:22,766 INFO L225 Difference]: With dead ends: 876 [2024-11-18 08:50:22,766 INFO L226 Difference]: Without dead ends: 581 [2024-11-18 08:50:22,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=659, Invalid=5821, Unknown=0, NotChecked=0, Total=6480 [2024-11-18 08:50:22,769 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 214 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:22,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1250 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-18 08:50:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-11-18 08:50:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 488. [2024-11-18 08:50:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 474 states have (on average 1.2320675105485233) internal successors, (584), 475 states have internal predecessors, (584), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 603 transitions. [2024-11-18 08:50:22,865 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 603 transitions. Word has length 59 [2024-11-18 08:50:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:22,866 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 603 transitions. [2024-11-18 08:50:22,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 50 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 08:50:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 603 transitions. [2024-11-18 08:50:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-18 08:50:22,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:22,868 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:22,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-18 08:50:23,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-18 08:50:23,069 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:23,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1040499838, now seen corresponding path program 5 times [2024-11-18 08:50:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742512601] [2024-11-18 08:50:23,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 08:50:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:23,122 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-18 08:50:23,123 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:50:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742512601] [2024-11-18 08:50:24,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742512601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:24,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930344562] [2024-11-18 08:50:24,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 08:50:24,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:24,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:24,166 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:24,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-18 08:50:24,432 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-18 08:50:24,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:24,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-18 08:50:24,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:25,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-18 08:50:25,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-18 08:50:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 08:50:25,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:25,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:50:25,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-18 08:50:25,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:50:25,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2024-11-18 08:50:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 08:50:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930344562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:26,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:26,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 18] total 55 [2024-11-18 08:50:26,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072708228] [2024-11-18 08:50:26,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:26,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-18 08:50:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-18 08:50:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2770, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 08:50:26,237 INFO L87 Difference]: Start difference. First operand 488 states and 603 transitions. Second operand has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 54 states have internal predecessors, (128), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 08:50:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:28,309 INFO L93 Difference]: Finished difference Result 643 states and 803 transitions. [2024-11-18 08:50:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-18 08:50:28,310 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 54 states have internal predecessors, (128), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-11-18 08:50:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:28,312 INFO L225 Difference]: With dead ends: 643 [2024-11-18 08:50:28,312 INFO L226 Difference]: Without dead ends: 574 [2024-11-18 08:50:28,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=464, Invalid=5388, Unknown=0, NotChecked=0, Total=5852 [2024-11-18 08:50:28,314 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 171 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:28,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1489 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-18 08:50:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2024-11-18 08:50:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 515. [2024-11-18 08:50:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 501 states have (on average 1.2335329341317365) internal successors, (618), 502 states have internal predecessors, (618), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 08:50:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 637 transitions. [2024-11-18 08:50:28,460 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 637 transitions. Word has length 59 [2024-11-18 08:50:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:28,462 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 637 transitions. [2024-11-18 08:50:28,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 54 states have internal predecessors, (128), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 08:50:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 637 transitions. [2024-11-18 08:50:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-18 08:50:28,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:28,463 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:28,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-18 08:50:28,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-18 08:50:28,664 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:28,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -756356250, now seen corresponding path program 2 times [2024-11-18 08:50:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303565108] [2024-11-18 08:50:28,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:28,696 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:28,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 08:50:29,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303565108] [2024-11-18 08:50:29,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303565108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335864147] [2024-11-18 08:50:29,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:50:29,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:29,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:29,217 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:29,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-18 08:50:29,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:50:29,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:29,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-18 08:50:29,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:29,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-18 08:50:33,454 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2024-11-18 08:50:33,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 08:50:33,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 08:50:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:50:33,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:33,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:50:33,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-18 08:50:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:50:33,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335864147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:33,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:33,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 22 [2024-11-18 08:50:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254571566] [2024-11-18 08:50:33,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:33,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 08:50:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 08:50:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=335, Unknown=1, NotChecked=38, Total=462 [2024-11-18 08:50:33,723 INFO L87 Difference]: Start difference. First operand 515 states and 637 transitions. Second operand has 22 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 22 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-18 08:50:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:50:34,169 INFO L93 Difference]: Finished difference Result 694 states and 863 transitions. [2024-11-18 08:50:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 08:50:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 22 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 62 [2024-11-18 08:50:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:50:34,172 INFO L225 Difference]: With dead ends: 694 [2024-11-18 08:50:34,172 INFO L226 Difference]: Without dead ends: 633 [2024-11-18 08:50:34,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=107, Invalid=402, Unknown=1, NotChecked=42, Total=552 [2024-11-18 08:50:34,172 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 75 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 08:50:34,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 573 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2024-11-18 08:50:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2024-11-18 08:50:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 525. [2024-11-18 08:50:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 509 states have (on average 1.2259332023575638) internal successors, (624), 510 states have internal predecessors, (624), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 08:50:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 645 transitions. [2024-11-18 08:50:34,307 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 645 transitions. Word has length 62 [2024-11-18 08:50:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:50:34,308 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 645 transitions. [2024-11-18 08:50:34,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 22 states have internal predecessors, (85), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-18 08:50:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 645 transitions. [2024-11-18 08:50:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-18 08:50:34,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:50:34,311 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:50:34,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-18 08:50:34,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-18 08:50:34,511 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:50:34,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:50:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 86836948, now seen corresponding path program 1 times [2024-11-18 08:50:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:50:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971297238] [2024-11-18 08:50:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:50:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:50:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:50:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:50:35,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:35,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971297238] [2024-11-18 08:50:35,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971297238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:35,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027850663] [2024-11-18 08:50:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:50:35,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:35,182 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:35,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-18 08:50:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:50:35,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-18 08:50:35,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:50:35,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 08:50:35,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 08:50:35,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 08:50:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 08:50:35,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:50:35,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 08:50:35,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-18 08:50:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-18 08:50:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027850663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:50:35,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:50:35,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 29 [2024-11-18 08:50:35,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665246236] [2024-11-18 08:50:35,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:50:35,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-18 08:50:35,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:50:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-18 08:50:35,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-18 08:50:35,987 INFO L87 Difference]: Start difference. First operand 525 states and 645 transitions. Second operand has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8)