./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/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-mul-div-a046e57-m [2024-10-12 14:26:16,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:26:16,198 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:26:16,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:26:16,205 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:26:16,232 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:26:16,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:26:16,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:26:16,235 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:26:16,237 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:26:16,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:26:16,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:26:16,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:26:16,239 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:26:16,241 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:26:16,242 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:26:16,242 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:26:16,242 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:26:16,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:26:16,243 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:26:16,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:26:16,247 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:26:16,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:26:16,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:26:16,247 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:26:16,248 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:26:16,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:26:16,248 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:26:16,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:26:16,249 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:26:16,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:26:16,249 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:26:16,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:26:16,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:26:16,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:26:16,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:26:16,251 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:26:16,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:26:16,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:26:16,252 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:26:16,253 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:26:16,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:26:16,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-10-12 14:26:16,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:26:16,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:26:16,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:26:16,542 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:26:16,542 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:26:16,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2024-10-12 14:26:18,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:26:18,267 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:26:18,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2024-10-12 14:26:18,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90342c89/93ffc81959eb4e19b58079d4376d7fe5/FLAGc0ae00ced [2024-10-12 14:26:18,597 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90342c89/93ffc81959eb4e19b58079d4376d7fe5 [2024-10-12 14:26:18,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:26:18,602 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:26:18,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:26:18,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:26:18,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:26:18,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:26:18" (1/1) ... [2024-10-12 14:26:18,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f84e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:18, skipping insertion in model container [2024-10-12 14:26:18,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:26:18" (1/1) ... [2024-10-12 14:26:18,654 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:26:18,888 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-10-12 14:26:19,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:26:19,072 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:26:19,085 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-10-12 14:26:19,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:26:19,145 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:26:19,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19 WrapperNode [2024-10-12 14:26:19,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:26:19,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:26:19,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:26:19,147 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:26:19,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,215 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 140 [2024-10-12 14:26:19,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:26:19,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:26:19,216 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:26:19,216 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:26:19,228 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,231 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,247 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]. [2024-10-12 14:26:19,247 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,247 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,254 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,264 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:26:19,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:26:19,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:26:19,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:26:19,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (1/1) ... [2024-10-12 14:26:19,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:26:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:19,318 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) [2024-10-12 14:26:19,321 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 [2024-10-12 14:26:19,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:26:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:26:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:26:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 14:26:19,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 14:26:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:26:19,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:26:19,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:26:19,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 14:26:19,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 14:26:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 14:26:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:26:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:26:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:26:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:26:19,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:26:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:26:19,515 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:26:19,517 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:26:19,858 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-10-12 14:26:19,858 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:26:19,900 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:26:19,900 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-12 14:26:19,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:26:19 BoogieIcfgContainer [2024-10-12 14:26:19,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:26:19,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:26:19,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:26:19,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:26:19,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:26:18" (1/3) ... [2024-10-12 14:26:19,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffae546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:26:19, skipping insertion in model container [2024-10-12 14:26:19,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:26:19" (2/3) ... [2024-10-12 14:26:19,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffae546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:26:19, skipping insertion in model container [2024-10-12 14:26:19,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:26:19" (3/3) ... [2024-10-12 14:26:19,911 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-10-12 14:26:19,929 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:26:19,930 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:26:20,000 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:26:20,008 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;@6b67cee9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:26:20,008 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:26:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 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) [2024-10-12 14:26:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 14:26:20,020 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:20,021 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] [2024-10-12 14:26:20,021 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:20,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash -707728986, now seen corresponding path program 1 times [2024-10-12 14:26:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232554701] [2024-10-12 14:26:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:20,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:20,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:20,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232554701] [2024-10-12 14:26:20,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232554701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:20,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:20,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:26:20,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79159666] [2024-10-12 14:26:20,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:20,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:26:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:20,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:26:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:26:20,280 INFO L87 Difference]: Start difference. First operand has 50 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2024-10-12 14:26:20,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:20,316 INFO L93 Difference]: Finished difference Result 98 states and 160 transitions. [2024-10-12 14:26:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:26:20,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 23 [2024-10-12 14:26:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:20,325 INFO L225 Difference]: With dead ends: 98 [2024-10-12 14:26:20,325 INFO L226 Difference]: Without dead ends: 46 [2024-10-12 14:26:20,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:26:20,333 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:20,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:26:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-12 14:26:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-12 14:26:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 40 states have internal predecessors, (52), 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) [2024-10-12 14:26:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2024-10-12 14:26:20,406 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 23 [2024-10-12 14:26:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:20,407 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2024-10-12 14:26:20,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2024-10-12 14:26:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2024-10-12 14:26:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 14:26:20,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:20,410 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] [2024-10-12 14:26:20,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:26:20,411 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:20,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1489726182, now seen corresponding path program 1 times [2024-10-12 14:26:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119390599] [2024-10-12 14:26:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:20,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:20,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:20,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119390599] [2024-10-12 14:26:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119390599] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:20,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:20,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:26:20,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389345439] [2024-10-12 14:26:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:20,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:26:20,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:26:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:26:20,750 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-10-12 14:26:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:20,797 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2024-10-12 14:26:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:26:20,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 23 [2024-10-12 14:26:20,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:20,800 INFO L225 Difference]: With dead ends: 70 [2024-10-12 14:26:20,800 INFO L226 Difference]: Without dead ends: 48 [2024-10-12 14:26:20,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:26:20,802 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:20,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:26:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-12 14:26:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-12 14:26:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 42 states have internal predecessors, (54), 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) [2024-10-12 14:26:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2024-10-12 14:26:20,816 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 23 [2024-10-12 14:26:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:20,817 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2024-10-12 14:26:20,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-10-12 14:26:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2024-10-12 14:26:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:26:20,821 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:20,821 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] [2024-10-12 14:26:20,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:26:20,822 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:20,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2012976157, now seen corresponding path program 1 times [2024-10-12 14:26:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235189086] [2024-10-12 14:26:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:21,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:21,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:21,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235189086] [2024-10-12 14:26:21,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235189086] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:21,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:21,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-12 14:26:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578817228] [2024-10-12 14:26:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:21,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 14:26:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 14:26:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:26:21,132 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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), 1 states have call successors, (2) [2024-10-12 14:26:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:21,246 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2024-10-12 14:26:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:26:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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), 1 states have call successors, (2) Word has length 26 [2024-10-12 14:26:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:21,248 INFO L225 Difference]: With dead ends: 101 [2024-10-12 14:26:21,249 INFO L226 Difference]: Without dead ends: 67 [2024-10-12 14:26:21,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:26:21,251 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:21,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 256 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-12 14:26:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-10-12 14:26:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 59 states have internal predecessors, (78), 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) [2024-10-12 14:26:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2024-10-12 14:26:21,267 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 26 [2024-10-12 14:26:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:21,267 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2024-10-12 14:26:21,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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), 1 states have call successors, (2) [2024-10-12 14:26:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2024-10-12 14:26:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 14:26:21,268 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:21,269 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] [2024-10-12 14:26:21,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:26:21,270 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:21,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1546106036, now seen corresponding path program 1 times [2024-10-12 14:26:21,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:21,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801537073] [2024-10-12 14:26:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:21,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:21,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:21,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:21,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801537073] [2024-10-12 14:26:21,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801537073] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:21,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-12 14:26:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568269844] [2024-10-12 14:26:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:21,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 14:26:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 14:26:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:26:21,716 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2024-10-12 14:26:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:21,902 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2024-10-12 14:26:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 14:26:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 [2024-10-12 14:26:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:21,904 INFO L225 Difference]: With dead ends: 103 [2024-10-12 14:26:21,904 INFO L226 Difference]: Without dead ends: 90 [2024-10-12 14:26:21,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:26:21,906 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:21,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 288 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-12 14:26:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2024-10-12 14:26:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.421875) internal successors, (91), 68 states have internal predecessors, (91), 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) [2024-10-12 14:26:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2024-10-12 14:26:21,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 27 [2024-10-12 14:26:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:21,927 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2024-10-12 14:26:21,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2024-10-12 14:26:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2024-10-12 14:26:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 14:26:21,928 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:21,929 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] [2024-10-12 14:26:21,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 14:26:21,929 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:21,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash -461543356, now seen corresponding path program 1 times [2024-10-12 14:26:21,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:21,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401179747] [2024-10-12 14:26:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:21,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:22,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:22,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:22,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:22,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401179747] [2024-10-12 14:26:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401179747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100922093] [2024-10-12 14:26:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:22,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:22,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:22,339 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) [2024-10-12 14:26:22,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:26:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:22,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:26:22,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:22,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:23,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100922093] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:23,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:23,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-12 14:26:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773735047] [2024-10-12 14:26:23,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:23,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 14:26:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 14:26:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:26:23,021 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 3 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) [2024-10-12 14:26:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:24,010 INFO L93 Difference]: Finished difference Result 193 states and 281 transitions. [2024-10-12 14:26:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 14:26:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 3 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 27 [2024-10-12 14:26:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:24,017 INFO L225 Difference]: With dead ends: 193 [2024-10-12 14:26:24,017 INFO L226 Difference]: Without dead ends: 163 [2024-10-12 14:26:24,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-10-12 14:26:24,019 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 195 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:24,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1099 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 14:26:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-12 14:26:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 121. [2024-10-12 14:26:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 113 states have internal predecessors, (156), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 173 transitions. [2024-10-12 14:26:24,046 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 173 transitions. Word has length 27 [2024-10-12 14:26:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:24,046 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 173 transitions. [2024-10-12 14:26:24,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 3 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) [2024-10-12 14:26:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 173 transitions. [2024-10-12 14:26:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 14:26:24,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:24,050 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] [2024-10-12 14:26:24,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:24,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:24,251 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:24,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash -346511103, now seen corresponding path program 1 times [2024-10-12 14:26:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:24,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606212780] [2024-10-12 14:26:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:24,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606212780] [2024-10-12 14:26:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606212780] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:24,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:26:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115049327] [2024-10-12 14:26:24,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:24,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:26:24,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:24,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:26:24,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:26:24,417 INFO L87 Difference]: Start difference. First operand 121 states and 173 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) [2024-10-12 14:26:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:24,500 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2024-10-12 14:26:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:26:24,503 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 [2024-10-12 14:26:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:24,504 INFO L225 Difference]: With dead ends: 140 [2024-10-12 14:26:24,506 INFO L226 Difference]: Without dead ends: 115 [2024-10-12 14:26:24,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:26:24,507 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:24,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 215 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-12 14:26:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2024-10-12 14:26:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.40625) internal successors, (135), 101 states have internal predecessors, (135), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 152 transitions. [2024-10-12 14:26:24,525 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 152 transitions. Word has length 28 [2024-10-12 14:26:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:24,526 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 152 transitions. [2024-10-12 14:26:24,527 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) [2024-10-12 14:26:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 152 transitions. [2024-10-12 14:26:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 14:26:24,528 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:24,528 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] [2024-10-12 14:26:24,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-12 14:26:24,529 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:24,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:24,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2143565419, now seen corresponding path program 1 times [2024-10-12 14:26:24,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:24,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957024188] [2024-10-12 14:26:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:24,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:24,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957024188] [2024-10-12 14:26:24,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957024188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:24,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047748050] [2024-10-12 14:26:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:24,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:24,883 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) [2024-10-12 14:26:24,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:26:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:24,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-12 14:26:24,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:25,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047748050] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:25,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:26:25,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 19 [2024-10-12 14:26:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557947571] [2024-10-12 14:26:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:25,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 14:26:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 14:26:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:26:25,296 INFO L87 Difference]: Start difference. First operand 109 states and 152 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2024-10-12 14:26:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:25,396 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2024-10-12 14:26:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:26:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 [2024-10-12 14:26:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:25,398 INFO L225 Difference]: With dead ends: 132 [2024-10-12 14:26:25,398 INFO L226 Difference]: Without dead ends: 111 [2024-10-12 14:26:25,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:26:25,399 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:25,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 347 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-12 14:26:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-10-12 14:26:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 101 states have internal predecessors, (131), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2024-10-12 14:26:25,415 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 28 [2024-10-12 14:26:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:25,415 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2024-10-12 14:26:25,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2024-10-12 14:26:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2024-10-12 14:26:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 14:26:25,416 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:25,417 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] [2024-10-12 14:26:25,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:25,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-12 14:26:25,621 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:25,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash 137763069, now seen corresponding path program 2 times [2024-10-12 14:26:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:25,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701454573] [2024-10-12 14:26:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:25,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:25,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:25,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701454573] [2024-10-12 14:26:25,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701454573] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380298173] [2024-10-12 14:26:25,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:26:25,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:25,931 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) [2024-10-12 14:26:25,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:26:26,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-12 14:26:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:26:26,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 14:26:26,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:26:26,199 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:26:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380298173] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:26,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:26:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-10-12 14:26:26,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225156243] [2024-10-12 14:26:26,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:26,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 14:26:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 14:26:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:26:26,202 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2024-10-12 14:26:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:26,334 INFO L93 Difference]: Finished difference Result 192 states and 256 transitions. [2024-10-12 14:26:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 14:26:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 28 [2024-10-12 14:26:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:26,335 INFO L225 Difference]: With dead ends: 192 [2024-10-12 14:26:26,335 INFO L226 Difference]: Without dead ends: 132 [2024-10-12 14:26:26,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-10-12 14:26:26,337 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:26,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 310 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-12 14:26:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 116. [2024-10-12 14:26:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 108 states have internal predecessors, (137), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2024-10-12 14:26:26,347 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 28 [2024-10-12 14:26:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:26,348 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2024-10-12 14:26:26,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2024-10-12 14:26:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2024-10-12 14:26:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-12 14:26:26,349 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:26,349 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] [2024-10-12 14:26:26,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:26:26,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:26,554 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:26,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2005746460, now seen corresponding path program 1 times [2024-10-12 14:26:26,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:26,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660133031] [2024-10-12 14:26:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:26,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:26,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:26,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660133031] [2024-10-12 14:26:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660133031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605112167] [2024-10-12 14:26:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:26,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:26,929 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) [2024-10-12 14:26:26,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:26:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:27,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-12 14:26:27,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:27,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:27,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605112167] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:27,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:27,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2024-10-12 14:26:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125118427] [2024-10-12 14:26:27,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:27,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 14:26:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 14:26:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-10-12 14:26:27,538 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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) [2024-10-12 14:26:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:28,882 INFO L93 Difference]: Finished difference Result 297 states and 419 transitions. [2024-10-12 14:26:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 14:26:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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 [2024-10-12 14:26:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:28,884 INFO L225 Difference]: With dead ends: 297 [2024-10-12 14:26:28,884 INFO L226 Difference]: Without dead ends: 246 [2024-10-12 14:26:28,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2024-10-12 14:26:28,886 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 629 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:28,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 857 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 14:26:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-10-12 14:26:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 135. [2024-10-12 14:26:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 127 states have internal predecessors, (162), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 179 transitions. [2024-10-12 14:26:28,911 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 179 transitions. Word has length 29 [2024-10-12 14:26:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:28,912 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 179 transitions. [2024-10-12 14:26:28,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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) [2024-10-12 14:26:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 179 transitions. [2024-10-12 14:26:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 14:26:28,913 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:28,915 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] [2024-10-12 14:26:28,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:29,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:29,120 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:29,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1474139541, now seen corresponding path program 1 times [2024-10-12 14:26:29,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:29,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604655021] [2024-10-12 14:26:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:29,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604655021] [2024-10-12 14:26:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604655021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:29,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:29,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:26:29,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802574760] [2024-10-12 14:26:29,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:29,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:26:29,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:26:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:26:29,190 INFO L87 Difference]: Start difference. First operand 135 states and 179 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-12 14:26:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:29,219 INFO L93 Difference]: Finished difference Result 164 states and 212 transitions. [2024-10-12 14:26:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:26:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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 30 [2024-10-12 14:26:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:29,221 INFO L225 Difference]: With dead ends: 164 [2024-10-12 14:26:29,222 INFO L226 Difference]: Without dead ends: 124 [2024-10-12 14:26:29,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:26:29,223 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:29,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:26:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-10-12 14:26:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2024-10-12 14:26:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 116 states have internal predecessors, (144), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2024-10-12 14:26:29,240 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 30 [2024-10-12 14:26:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:29,242 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2024-10-12 14:26:29,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-12 14:26:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2024-10-12 14:26:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-12 14:26:29,243 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:29,243 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] [2024-10-12 14:26:29,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-12 14:26:29,243 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:29,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1876573838, now seen corresponding path program 1 times [2024-10-12 14:26:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:29,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212105578] [2024-10-12 14:26:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212105578] [2024-10-12 14:26:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212105578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:29,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:26:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545113797] [2024-10-12 14:26:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:29,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:26:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:26:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:26:29,295 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2024-10-12 14:26:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:29,329 INFO L93 Difference]: Finished difference Result 171 states and 227 transitions. [2024-10-12 14:26:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:26:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 [2024-10-12 14:26:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:29,331 INFO L225 Difference]: With dead ends: 171 [2024-10-12 14:26:29,331 INFO L226 Difference]: Without dead ends: 128 [2024-10-12 14:26:29,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:26:29,332 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:29,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 111 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:26:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-12 14:26:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-10-12 14:26:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 111 states have (on average 1.3513513513513513) internal successors, (150), 116 states have internal predecessors, (150), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 14:26:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 167 transitions. [2024-10-12 14:26:29,348 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 167 transitions. Word has length 31 [2024-10-12 14:26:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:29,348 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 167 transitions. [2024-10-12 14:26:29,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2024-10-12 14:26:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 167 transitions. [2024-10-12 14:26:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 14:26:29,349 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:29,350 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] [2024-10-12 14:26:29,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-12 14:26:29,350 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:29,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash 186210114, now seen corresponding path program 1 times [2024-10-12 14:26:29,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:29,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65155464] [2024-10-12 14:26:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:29,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:29,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:29,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65155464] [2024-10-12 14:26:29,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65155464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:29,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920084636] [2024-10-12 14:26:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:29,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:29,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:29,658 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) [2024-10-12 14:26:29,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:26:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:29,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 14:26:29,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:30,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:30,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920084636] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:30,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 29 [2024-10-12 14:26:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472696966] [2024-10-12 14:26:30,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:30,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:26:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:26:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:26:30,491 INFO L87 Difference]: Start difference. First operand 124 states and 167 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 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) [2024-10-12 14:26:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:31,507 INFO L93 Difference]: Finished difference Result 271 states and 377 transitions. [2024-10-12 14:26:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 14:26:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 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 32 [2024-10-12 14:26:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:31,509 INFO L225 Difference]: With dead ends: 271 [2024-10-12 14:26:31,509 INFO L226 Difference]: Without dead ends: 269 [2024-10-12 14:26:31,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2024-10-12 14:26:31,511 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 275 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:31,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1202 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:26:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-10-12 14:26:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 152. [2024-10-12 14:26:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 143 states have internal predecessors, (186), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 205 transitions. [2024-10-12 14:26:31,540 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 205 transitions. Word has length 32 [2024-10-12 14:26:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:31,540 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 205 transitions. [2024-10-12 14:26:31,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 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) [2024-10-12 14:26:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 205 transitions. [2024-10-12 14:26:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 14:26:31,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:31,541 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] [2024-10-12 14:26:31,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 14:26:31,745 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,SelfDestructingSolverStorable11 [2024-10-12 14:26:31,746 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:31,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1428606122, now seen corresponding path program 2 times [2024-10-12 14:26:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:31,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895741000] [2024-10-12 14:26:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:31,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:32,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:32,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895741000] [2024-10-12 14:26:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895741000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570883675] [2024-10-12 14:26:32,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:26:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:32,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:32,084 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) [2024-10-12 14:26:32,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:26:32,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-12 14:26:32,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:26:32,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:26:32,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:26:32,251 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:26:32,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570883675] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:32,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:26:32,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2024-10-12 14:26:32,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944490123] [2024-10-12 14:26:32,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:32,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 14:26:32,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 14:26:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:26:32,254 INFO L87 Difference]: Start difference. First operand 152 states and 205 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2024-10-12 14:26:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:32,369 INFO L93 Difference]: Finished difference Result 160 states and 212 transitions. [2024-10-12 14:26:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 14:26:32,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 32 [2024-10-12 14:26:32,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:32,371 INFO L225 Difference]: With dead ends: 160 [2024-10-12 14:26:32,371 INFO L226 Difference]: Without dead ends: 158 [2024-10-12 14:26:32,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-10-12 14:26:32,372 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:32,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 182 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-12 14:26:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2024-10-12 14:26:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 140 states have (on average 1.35) internal successors, (189), 146 states have internal predecessors, (189), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2024-10-12 14:26:32,396 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 32 [2024-10-12 14:26:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:32,396 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2024-10-12 14:26:32,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2024-10-12 14:26:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2024-10-12 14:26:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 14:26:32,398 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:32,398 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, 1] [2024-10-12 14:26:32,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:26:32,599 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 [2024-10-12 14:26:32,599 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:32,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1316202347, now seen corresponding path program 1 times [2024-10-12 14:26:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:32,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988691119] [2024-10-12 14:26:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:32,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:32,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988691119] [2024-10-12 14:26:32,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988691119] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948310073] [2024-10-12 14:26:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:32,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:32,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:32,891 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) [2024-10-12 14:26:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:26:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:32,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 14:26:32,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:33,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948310073] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:33,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:26:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 14 [2024-10-12 14:26:33,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308410802] [2024-10-12 14:26:33,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:33,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:26:33,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:26:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:26:33,185 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-10-12 14:26:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:33,276 INFO L93 Difference]: Finished difference Result 178 states and 238 transitions. [2024-10-12 14:26:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:26:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 36 [2024-10-12 14:26:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:33,278 INFO L225 Difference]: With dead ends: 178 [2024-10-12 14:26:33,278 INFO L226 Difference]: Without dead ends: 169 [2024-10-12 14:26:33,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:26:33,279 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 30 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:33,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 182 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-12 14:26:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2024-10-12 14:26:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 144 states have (on average 1.3472222222222223) internal successors, (194), 150 states have internal predecessors, (194), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 213 transitions. [2024-10-12 14:26:33,301 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 213 transitions. Word has length 36 [2024-10-12 14:26:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:33,301 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 213 transitions. [2024-10-12 14:26:33,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-10-12 14:26:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 213 transitions. [2024-10-12 14:26:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 14:26:33,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:33,302 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] [2024-10-12 14:26:33,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 14:26:33,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:33,503 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:33,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash -529037360, now seen corresponding path program 1 times [2024-10-12 14:26:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14655033] [2024-10-12 14:26:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:33,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:33,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:26:33,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:33,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14655033] [2024-10-12 14:26:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14655033] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:33,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:33,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:26:33,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298641905] [2024-10-12 14:26:33,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:33,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:26:33,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:26:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:26:33,624 INFO L87 Difference]: Start difference. First operand 160 states and 213 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-10-12 14:26:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:33,700 INFO L93 Difference]: Finished difference Result 171 states and 225 transitions. [2024-10-12 14:26:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:26:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 37 [2024-10-12 14:26:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:33,701 INFO L225 Difference]: With dead ends: 171 [2024-10-12 14:26:33,702 INFO L226 Difference]: Without dead ends: 162 [2024-10-12 14:26:33,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:26:33,704 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 26 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:33,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 139 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-12 14:26:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2024-10-12 14:26:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 142 states have (on average 1.3450704225352113) internal successors, (191), 148 states have internal predecessors, (191), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 210 transitions. [2024-10-12 14:26:33,727 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 210 transitions. Word has length 37 [2024-10-12 14:26:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:33,727 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 210 transitions. [2024-10-12 14:26:33,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-10-12 14:26:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 210 transitions. [2024-10-12 14:26:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:26:33,729 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:33,729 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, 1, 1, 1, 1] [2024-10-12 14:26:33,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-12 14:26:33,729 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:33,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1233140308, now seen corresponding path program 1 times [2024-10-12 14:26:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295084630] [2024-10-12 14:26:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:34,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:34,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:34,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:34,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295084630] [2024-10-12 14:26:34,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295084630] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717870831] [2024-10-12 14:26:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:34,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:34,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:34,148 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) [2024-10-12 14:26:34,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:26:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:34,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-12 14:26:34,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:34,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717870831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:34,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:34,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 12] total 26 [2024-10-12 14:26:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591126214] [2024-10-12 14:26:34,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:34,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 14:26:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 14:26:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-10-12 14:26:34,968 INFO L87 Difference]: Start difference. First operand 158 states and 210 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 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) [2024-10-12 14:26:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:35,583 INFO L93 Difference]: Finished difference Result 215 states and 285 transitions. [2024-10-12 14:26:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 14:26:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 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 39 [2024-10-12 14:26:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:35,585 INFO L225 Difference]: With dead ends: 215 [2024-10-12 14:26:35,585 INFO L226 Difference]: Without dead ends: 199 [2024-10-12 14:26:35,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 14:26:35,586 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 213 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:35,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 584 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:26:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-10-12 14:26:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2024-10-12 14:26:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 132 states have internal predecessors, (167), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2024-10-12 14:26:35,608 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 39 [2024-10-12 14:26:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:35,608 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2024-10-12 14:26:35,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 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) [2024-10-12 14:26:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2024-10-12 14:26:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:26:35,609 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:35,609 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] [2024-10-12 14:26:35,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 14:26:35,810 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,SelfDestructingSolverStorable15 [2024-10-12 14:26:35,810 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:35,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1942047984, now seen corresponding path program 1 times [2024-10-12 14:26:35,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:35,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932113863] [2024-10-12 14:26:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:35,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:36,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:36,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932113863] [2024-10-12 14:26:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932113863] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453581375] [2024-10-12 14:26:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:36,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:36,066 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) [2024-10-12 14:26:36,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:26:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:36,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-12 14:26:36,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:36,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:36,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453581375] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:36,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:36,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 12] total 24 [2024-10-12 14:26:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787985875] [2024-10-12 14:26:36,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:36,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 14:26:36,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 14:26:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2024-10-12 14:26:36,548 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 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) [2024-10-12 14:26:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:37,311 INFO L93 Difference]: Finished difference Result 281 states and 373 transitions. [2024-10-12 14:26:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-12 14:26:37,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 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 39 [2024-10-12 14:26:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:37,313 INFO L225 Difference]: With dead ends: 281 [2024-10-12 14:26:37,313 INFO L226 Difference]: Without dead ends: 186 [2024-10-12 14:26:37,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 14:26:37,314 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:37,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 818 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:26:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-10-12 14:26:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 135. [2024-10-12 14:26:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 125 states have internal predecessors, (152), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 171 transitions. [2024-10-12 14:26:37,335 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 171 transitions. Word has length 39 [2024-10-12 14:26:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:37,335 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 171 transitions. [2024-10-12 14:26:37,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 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) [2024-10-12 14:26:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 171 transitions. [2024-10-12 14:26:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 14:26:37,336 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:37,336 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] [2024-10-12 14:26:37,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 14:26:37,537 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,SelfDestructingSolverStorable16 [2024-10-12 14:26:37,537 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:37,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash 172256907, now seen corresponding path program 1 times [2024-10-12 14:26:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:37,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498042640] [2024-10-12 14:26:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:37,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:37,667 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:26:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498042640] [2024-10-12 14:26:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498042640] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550296907] [2024-10-12 14:26:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:37,673 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) [2024-10-12 14:26:37,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:26:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:37,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 14:26:37,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:38,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:26:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550296907] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:38,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:38,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2024-10-12 14:26:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244167101] [2024-10-12 14:26:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:38,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 14:26:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 14:26:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:26:38,131 INFO L87 Difference]: Start difference. First operand 135 states and 171 transitions. Second operand has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 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) [2024-10-12 14:26:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:38,677 INFO L93 Difference]: Finished difference Result 274 states and 373 transitions. [2024-10-12 14:26:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-12 14:26:38,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 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 40 [2024-10-12 14:26:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:38,679 INFO L225 Difference]: With dead ends: 274 [2024-10-12 14:26:38,679 INFO L226 Difference]: Without dead ends: 255 [2024-10-12 14:26:38,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:26:38,680 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 164 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:38,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 876 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:26:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-10-12 14:26:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 152. [2024-10-12 14:26:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 136 states have (on average 1.3014705882352942) internal successors, (177), 142 states have internal predecessors, (177), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2024-10-12 14:26:38,719 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 40 [2024-10-12 14:26:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:38,719 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2024-10-12 14:26:38,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 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) [2024-10-12 14:26:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2024-10-12 14:26:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 14:26:38,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:38,721 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] [2024-10-12 14:26:38,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:38,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-12 14:26:38,922 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:38,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash 174103949, now seen corresponding path program 2 times [2024-10-12 14:26:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89202342] [2024-10-12 14:26:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:38,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:39,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:39,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89202342] [2024-10-12 14:26:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89202342] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724292440] [2024-10-12 14:26:39,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:26:39,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:39,116 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) [2024-10-12 14:26:39,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:26:39,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-12 14:26:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:26:39,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:26:39,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:26:39,307 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:26:39,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724292440] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:39,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:26:39,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2024-10-12 14:26:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149591124] [2024-10-12 14:26:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:39,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:26:39,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:26:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:26:39,308 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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) [2024-10-12 14:26:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:39,394 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2024-10-12 14:26:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:26:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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 40 [2024-10-12 14:26:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:39,396 INFO L225 Difference]: With dead ends: 194 [2024-10-12 14:26:39,396 INFO L226 Difference]: Without dead ends: 185 [2024-10-12 14:26:39,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:26:39,397 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:39,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:26:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-12 14:26:39,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2024-10-12 14:26:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 160 states have (on average 1.30625) internal successors, (209), 166 states have internal predecessors, (209), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 228 transitions. [2024-10-12 14:26:39,425 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 228 transitions. Word has length 40 [2024-10-12 14:26:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:39,425 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 228 transitions. [2024-10-12 14:26:39,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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) [2024-10-12 14:26:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 228 transitions. [2024-10-12 14:26:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 14:26:39,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:39,427 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] [2024-10-12 14:26:39,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 14:26:39,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:39,628 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:39,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 852315277, now seen corresponding path program 1 times [2024-10-12 14:26:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:39,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069406508] [2024-10-12 14:26:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:40,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:40,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:26:40,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069406508] [2024-10-12 14:26:40,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069406508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24165975] [2024-10-12 14:26:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:40,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:40,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:40,195 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) [2024-10-12 14:26:40,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:26:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:40,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-12 14:26:40,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:40,368 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 [2024-10-12 14:26:40,659 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 [2024-10-12 14:26:40,663 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 16 treesize of output 8 [2024-10-12 14:26:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:26:40,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:40,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:26:40,997 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 [2024-10-12 14:26:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:26:41,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24165975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:41,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:41,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-10-12 14:26:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843127070] [2024-10-12 14:26:41,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:41,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-12 14:26:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-12 14:26:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2024-10-12 14:26:41,093 INFO L87 Difference]: Start difference. First operand 176 states and 228 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 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) [2024-10-12 14:26:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:42,431 INFO L93 Difference]: Finished difference Result 386 states and 518 transitions. [2024-10-12 14:26:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-12 14:26:42,432 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 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 40 [2024-10-12 14:26:42,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:42,434 INFO L225 Difference]: With dead ends: 386 [2024-10-12 14:26:42,434 INFO L226 Difference]: Without dead ends: 337 [2024-10-12 14:26:42,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=392, Invalid=2470, Unknown=0, NotChecked=0, Total=2862 [2024-10-12 14:26:42,436 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 280 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:42,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1058 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-12 14:26:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-10-12 14:26:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 202. [2024-10-12 14:26:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 186 states have (on average 1.3172043010752688) internal successors, (245), 192 states have internal predecessors, (245), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:26:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 264 transitions. [2024-10-12 14:26:42,480 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 264 transitions. Word has length 40 [2024-10-12 14:26:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:42,481 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 264 transitions. [2024-10-12 14:26:42,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 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) [2024-10-12 14:26:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 264 transitions. [2024-10-12 14:26:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 14:26:42,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:42,482 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] [2024-10-12 14:26:42,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 14:26:42,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:42,683 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:42,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -758214116, now seen corresponding path program 2 times [2024-10-12 14:26:42,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:42,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246060072] [2024-10-12 14:26:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:42,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:42,981 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:42,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:26:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246060072] [2024-10-12 14:26:42,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246060072] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822366859] [2024-10-12 14:26:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:26:42,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:42,990 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) [2024-10-12 14:26:42,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 14:26:43,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:26:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:26:43,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 14:26:43,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:26:43,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:26:43,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822366859] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:43,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:43,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2024-10-12 14:26:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575669396] [2024-10-12 14:26:43,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:43,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 14:26:43,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:43,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 14:26:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:26:43,396 INFO L87 Difference]: Start difference. First operand 202 states and 264 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 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) [2024-10-12 14:26:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:44,378 INFO L93 Difference]: Finished difference Result 512 states and 703 transitions. [2024-10-12 14:26:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-12 14:26:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 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 [2024-10-12 14:26:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:44,381 INFO L225 Difference]: With dead ends: 512 [2024-10-12 14:26:44,381 INFO L226 Difference]: Without dead ends: 462 [2024-10-12 14:26:44,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2024-10-12 14:26:44,386 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 278 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:44,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1312 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 14:26:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-10-12 14:26:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 255. [2024-10-12 14:26:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 238 states have (on average 1.3319327731092436) internal successors, (317), 244 states have internal predecessors, (317), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:26:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2024-10-12 14:26:44,432 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 41 [2024-10-12 14:26:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:44,433 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2024-10-12 14:26:44,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 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) [2024-10-12 14:26:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2024-10-12 14:26:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 14:26:44,435 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:44,435 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] [2024-10-12 14:26:44,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:44,635 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,SelfDestructingSolverStorable20 [2024-10-12 14:26:44,636 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:44,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1869219478, now seen corresponding path program 1 times [2024-10-12 14:26:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:44,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744191611] [2024-10-12 14:26:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:44,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:44,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:44,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:44,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 14:26:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:44,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:44,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744191611] [2024-10-12 14:26:44,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744191611] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385540081] [2024-10-12 14:26:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:44,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:44,757 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) [2024-10-12 14:26:44,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 14:26:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:44,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 14:26:44,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:26:44,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:26:45,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385540081] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:45,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:26:45,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 13 [2024-10-12 14:26:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905559680] [2024-10-12 14:26:45,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:45,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:26:45,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:26:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-12 14:26:45,009 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2024-10-12 14:26:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:45,082 INFO L93 Difference]: Finished difference Result 280 states and 372 transitions. [2024-10-12 14:26:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:26:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 [2024-10-12 14:26:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:45,084 INFO L225 Difference]: With dead ends: 280 [2024-10-12 14:26:45,085 INFO L226 Difference]: Without dead ends: 262 [2024-10-12 14:26:45,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-12 14:26:45,085 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 3 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:45,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:26:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-10-12 14:26:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2024-10-12 14:26:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 242 states have (on average 1.334710743801653) internal successors, (323), 248 states have internal predecessors, (323), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:26:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 344 transitions. [2024-10-12 14:26:45,127 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 344 transitions. Word has length 43 [2024-10-12 14:26:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:45,127 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 344 transitions. [2024-10-12 14:26:45,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2024-10-12 14:26:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 344 transitions. [2024-10-12 14:26:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 14:26:45,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:45,128 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] [2024-10-12 14:26:45,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-12 14:26:45,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:45,333 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:45,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1038195707, now seen corresponding path program 1 times [2024-10-12 14:26:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:45,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553687446] [2024-10-12 14:26:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:46,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:46,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:26:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553687446] [2024-10-12 14:26:46,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553687446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365603470] [2024-10-12 14:26:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:46,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:46,161 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) [2024-10-12 14:26:46,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 14:26:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:46,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-12 14:26:46,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:46,343 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 [2024-10-12 14:26:46,686 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 [2024-10-12 14:26:46,688 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 [2024-10-12 14:26:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:26:46,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:46,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:26:46,879 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 [2024-10-12 14:26:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:26:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365603470] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:47,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:47,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 38 [2024-10-12 14:26:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899070351] [2024-10-12 14:26:47,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:47,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 14:26:47,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 14:26:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:26:47,019 INFO L87 Difference]: Start difference. First operand 259 states and 344 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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) [2024-10-12 14:26:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:47,589 INFO L93 Difference]: Finished difference Result 404 states and 533 transitions. [2024-10-12 14:26:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 14:26:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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 [2024-10-12 14:26:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:47,592 INFO L225 Difference]: With dead ends: 404 [2024-10-12 14:26:47,592 INFO L226 Difference]: Without dead ends: 304 [2024-10-12 14:26:47,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2024-10-12 14:26:47,593 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 104 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:47,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 703 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:26:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-10-12 14:26:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 274. [2024-10-12 14:26:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 257 states have (on average 1.3307392996108949) internal successors, (342), 263 states have internal predecessors, (342), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:26:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 363 transitions. [2024-10-12 14:26:47,634 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 363 transitions. Word has length 44 [2024-10-12 14:26:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:47,634 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 363 transitions. [2024-10-12 14:26:47,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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) [2024-10-12 14:26:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 363 transitions. [2024-10-12 14:26:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 14:26:47,635 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:47,635 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-10-12 14:26:47,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-12 14:26:47,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:47,840 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:47,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 902962279, now seen corresponding path program 1 times [2024-10-12 14:26:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:47,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321113282] [2024-10-12 14:26:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:48,024 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:48,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 14:26:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321113282] [2024-10-12 14:26:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321113282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110075632] [2024-10-12 14:26:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:48,031 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) [2024-10-12 14:26:48,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 14:26:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:48,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 14:26:48,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:26:48,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:26:48,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110075632] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:48,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:48,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2024-10-12 14:26:48,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325438239] [2024-10-12 14:26:48,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:48,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 14:26:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 14:26:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:26:48,494 INFO L87 Difference]: Start difference. First operand 274 states and 363 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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) [2024-10-12 14:26:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:49,107 INFO L93 Difference]: Finished difference Result 813 states and 1093 transitions. [2024-10-12 14:26:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-12 14:26:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 45 [2024-10-12 14:26:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:49,110 INFO L225 Difference]: With dead ends: 813 [2024-10-12 14:26:49,111 INFO L226 Difference]: Without dead ends: 699 [2024-10-12 14:26:49,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:26:49,112 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 157 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:49,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 865 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:26:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2024-10-12 14:26:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 321. [2024-10-12 14:26:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 304 states have (on average 1.325657894736842) internal successors, (403), 310 states have internal predecessors, (403), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:26:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 424 transitions. [2024-10-12 14:26:49,171 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 424 transitions. Word has length 45 [2024-10-12 14:26:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:49,171 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 424 transitions. [2024-10-12 14:26:49,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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) [2024-10-12 14:26:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 424 transitions. [2024-10-12 14:26:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 14:26:49,173 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:49,173 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] [2024-10-12 14:26:49,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:49,376 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,SelfDestructingSolverStorable23 [2024-10-12 14:26:49,377 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:49,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 696204864, now seen corresponding path program 1 times [2024-10-12 14:26:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:49,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226227322] [2024-10-12 14:26:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:49,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:49,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:49,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:49,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 14:26:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:26:49,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:49,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226227322] [2024-10-12 14:26:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226227322] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:26:49,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:26:49,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:26:49,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861625532] [2024-10-12 14:26:49,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:26:49,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:26:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:26:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:26:49,437 INFO L87 Difference]: Start difference. First operand 321 states and 424 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) [2024-10-12 14:26:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:49,545 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2024-10-12 14:26:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:26:49,545 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 [2024-10-12 14:26:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:49,547 INFO L225 Difference]: With dead ends: 341 [2024-10-12 14:26:49,547 INFO L226 Difference]: Without dead ends: 322 [2024-10-12 14:26:49,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:26:49,548 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:49,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:26:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-10-12 14:26:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2024-10-12 14:26:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 303 states have (on average 1.3201320132013201) internal successors, (400), 308 states have internal predecessors, (400), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:26:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 421 transitions. [2024-10-12 14:26:49,633 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 421 transitions. Word has length 48 [2024-10-12 14:26:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:49,634 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 421 transitions. [2024-10-12 14:26:49,634 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) [2024-10-12 14:26:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 421 transitions. [2024-10-12 14:26:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-12 14:26:49,636 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:49,636 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-12 14:26:49,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-12 14:26:49,636 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:49,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1740399151, now seen corresponding path program 1 times [2024-10-12 14:26:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:49,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349737374] [2024-10-12 14:26:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:49,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:50,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:50,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:26:50,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:50,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349737374] [2024-10-12 14:26:50,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349737374] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:50,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002863431] [2024-10-12 14:26:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:50,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:50,211 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) [2024-10-12 14:26:50,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-12 14:26:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:50,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-12 14:26:50,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:50,770 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 [2024-10-12 14:26:50,776 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 [2024-10-12 14:26:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 14:26:50,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:51,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:26:51,043 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 [2024-10-12 14:26:51,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:26:51,055 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 [2024-10-12 14:26:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:26:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002863431] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:51,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 30 [2024-10-12 14:26:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881622603] [2024-10-12 14:26:51,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:51,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 14:26:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 14:26:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:26:51,178 INFO L87 Difference]: Start difference. First operand 320 states and 421 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 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) [2024-10-12 14:26:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:26:52,929 INFO L93 Difference]: Finished difference Result 682 states and 907 transitions. [2024-10-12 14:26:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-12 14:26:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 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 47 [2024-10-12 14:26:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:26:52,932 INFO L225 Difference]: With dead ends: 682 [2024-10-12 14:26:52,932 INFO L226 Difference]: Without dead ends: 569 [2024-10-12 14:26:52,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=423, Invalid=2547, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 14:26:52,934 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 436 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:26:52,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 919 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 14:26:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2024-10-12 14:26:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 333. [2024-10-12 14:26:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 316 states have (on average 1.3101265822784811) internal successors, (414), 321 states have internal predecessors, (414), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:26:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 435 transitions. [2024-10-12 14:26:53,002 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 435 transitions. Word has length 47 [2024-10-12 14:26:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:26:53,002 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 435 transitions. [2024-10-12 14:26:53,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 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) [2024-10-12 14:26:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 435 transitions. [2024-10-12 14:26:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-12 14:26:53,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:26:53,005 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-10-12 14:26:53,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-12 14:26:53,209 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,SelfDestructingSolverStorable25 [2024-10-12 14:26:53,210 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:26:53,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:26:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1467788167, now seen corresponding path program 2 times [2024-10-12 14:26:53,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:26:53,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45145388] [2024-10-12 14:26:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:26:53,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:26:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:53,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:26:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:53,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:26:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:26:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:26:53,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:26:53,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45145388] [2024-10-12 14:26:53,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45145388] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:26:53,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377987315] [2024-10-12 14:26:53,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:26:53,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:26:53,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:26:53,583 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) [2024-10-12 14:26:53,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-12 14:26:53,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:26:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:26:53,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-12 14:26:53,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:26:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:53,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:26:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:26:54,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377987315] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:26:54,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:26:54,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 30 [2024-10-12 14:26:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142418629] [2024-10-12 14:26:54,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:26:54,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 14:26:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:26:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 14:26:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:26:54,183 INFO L87 Difference]: Start difference. First operand 333 states and 435 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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) [2024-10-12 14:27:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:03,939 INFO L93 Difference]: Finished difference Result 697 states and 911 transitions. [2024-10-12 14:27:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-12 14:27:03,940 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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 47 [2024-10-12 14:27:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:03,943 INFO L225 Difference]: With dead ends: 697 [2024-10-12 14:27:03,943 INFO L226 Difference]: Without dead ends: 618 [2024-10-12 14:27:03,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=378, Invalid=3044, Unknown=0, NotChecked=0, Total=3422 [2024-10-12 14:27:03,945 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 214 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:03,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 3154 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-12 14:27:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-10-12 14:27:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 335. [2024-10-12 14:27:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 318 states have (on average 1.2924528301886793) internal successors, (411), 323 states have internal predecessors, (411), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:27:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 432 transitions. [2024-10-12 14:27:04,004 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 432 transitions. Word has length 47 [2024-10-12 14:27:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:04,005 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 432 transitions. [2024-10-12 14:27:04,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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) [2024-10-12 14:27:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 432 transitions. [2024-10-12 14:27:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 14:27:04,006 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:04,006 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-12 14:27:04,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-12 14:27:04,210 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,SelfDestructingSolverStorable26 [2024-10-12 14:27:04,211 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:04,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:04,211 INFO L85 PathProgramCache]: Analyzing trace with hash -282012158, now seen corresponding path program 3 times [2024-10-12 14:27:04,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:04,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920644444] [2024-10-12 14:27:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:04,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:05,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:05,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:27:05,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:05,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920644444] [2024-10-12 14:27:05,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920644444] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045633392] [2024-10-12 14:27:05,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:27:05,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:05,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:05,144 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) [2024-10-12 14:27:05,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-12 14:27:05,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:27:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:27:05,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-12 14:27:05,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:05,405 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 [2024-10-12 14:27:05,642 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 [2024-10-12 14:27:05,646 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 [2024-10-12 14:27:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:27:05,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:06,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:27:06,038 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 [2024-10-12 14:27:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:27:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045633392] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:06,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:06,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2024-10-12 14:27:06,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339729625] [2024-10-12 14:27:06,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:06,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-12 14:27:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-12 14:27:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-10-12 14:27:06,194 INFO L87 Difference]: Start difference. First operand 335 states and 432 transitions. Second operand has 31 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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) [2024-10-12 14:27:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:06,957 INFO L93 Difference]: Finished difference Result 539 states and 712 transitions. [2024-10-12 14:27:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 14:27:06,958 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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 48 [2024-10-12 14:27:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:06,959 INFO L225 Difference]: With dead ends: 539 [2024-10-12 14:27:06,959 INFO L226 Difference]: Without dead ends: 475 [2024-10-12 14:27:06,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 14:27:06,960 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 130 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:06,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1242 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:27:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-10-12 14:27:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 381. [2024-10-12 14:27:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 364 states have (on average 1.2967032967032968) internal successors, (472), 369 states have internal predecessors, (472), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:27:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 493 transitions. [2024-10-12 14:27:07,018 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 493 transitions. Word has length 48 [2024-10-12 14:27:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:07,018 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 493 transitions. [2024-10-12 14:27:07,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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) [2024-10-12 14:27:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 493 transitions. [2024-10-12 14:27:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 14:27:07,019 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:07,019 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-10-12 14:27:07,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-12 14:27:07,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:07,220 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:07,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash -634903354, now seen corresponding path program 2 times [2024-10-12 14:27:07,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:07,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232484893] [2024-10-12 14:27:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:07,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:07,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-12 14:27:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232484893] [2024-10-12 14:27:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232484893] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966224380] [2024-10-12 14:27:07,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:27:07,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:07,452 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) [2024-10-12 14:27:07,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-12 14:27:07,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:27:07,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:27:07,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 14:27:07,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:27:07,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-12 14:27:08,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966224380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:08,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:08,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 22 [2024-10-12 14:27:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101367061] [2024-10-12 14:27:08,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:08,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 14:27:08,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 14:27:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-10-12 14:27:08,080 INFO L87 Difference]: Start difference. First operand 381 states and 493 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 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) [2024-10-12 14:27:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:08,705 INFO L93 Difference]: Finished difference Result 628 states and 815 transitions. [2024-10-12 14:27:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 14:27:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 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 48 [2024-10-12 14:27:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:08,709 INFO L225 Difference]: With dead ends: 628 [2024-10-12 14:27:08,709 INFO L226 Difference]: Without dead ends: 603 [2024-10-12 14:27:08,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-10-12 14:27:08,710 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 90 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:08,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1378 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:27:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2024-10-12 14:27:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 412. [2024-10-12 14:27:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 395 states have (on average 1.308860759493671) internal successors, (517), 400 states have internal predecessors, (517), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:27:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 538 transitions. [2024-10-12 14:27:08,804 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 538 transitions. Word has length 48 [2024-10-12 14:27:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:08,805 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 538 transitions. [2024-10-12 14:27:08,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 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) [2024-10-12 14:27:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 538 transitions. [2024-10-12 14:27:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-12 14:27:08,806 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:08,806 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] [2024-10-12 14:27:08,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-12 14:27:09,010 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,SelfDestructingSolverStorable28 [2024-10-12 14:27:09,011 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:09,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash -558772694, now seen corresponding path program 1 times [2024-10-12 14:27:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:09,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771853465] [2024-10-12 14:27:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:09,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:09,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:09,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 14:27:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:09,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 14:27:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 14:27:09,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771853465] [2024-10-12 14:27:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771853465] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964494559] [2024-10-12 14:27:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:09,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:09,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:09,172 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) [2024-10-12 14:27:09,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-12 14:27:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:09,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:27:09,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:27:09,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:27:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964494559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:09,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:09,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-12 14:27:09,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677740358] [2024-10-12 14:27:09,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:09,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 14:27:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 14:27:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-10-12 14:27:09,496 INFO L87 Difference]: Start difference. First operand 412 states and 538 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) [2024-10-12 14:27:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:09,727 INFO L93 Difference]: Finished difference Result 462 states and 602 transitions. [2024-10-12 14:27:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:27:09,728 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 [2024-10-12 14:27:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:09,729 INFO L225 Difference]: With dead ends: 462 [2024-10-12 14:27:09,729 INFO L226 Difference]: Without dead ends: 400 [2024-10-12 14:27:09,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:27:09,731 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:09,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 365 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:27:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-10-12 14:27:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 393. [2024-10-12 14:27:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 377 states have (on average 1.3156498673740054) internal successors, (496), 381 states have internal predecessors, (496), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:27:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 517 transitions. [2024-10-12 14:27:09,809 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 517 transitions. Word has length 51 [2024-10-12 14:27:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:09,809 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 517 transitions. [2024-10-12 14:27:09,810 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) [2024-10-12 14:27:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 517 transitions. [2024-10-12 14:27:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 14:27:09,810 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:09,810 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] [2024-10-12 14:27:09,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-12 14:27:10,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:10,011 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:10,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash -605071295, now seen corresponding path program 3 times [2024-10-12 14:27:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:10,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409432034] [2024-10-12 14:27:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:10,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:10,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:10,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:27:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:10,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409432034] [2024-10-12 14:27:10,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409432034] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:10,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276979457] [2024-10-12 14:27:10,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:27:10,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:10,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:10,502 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) [2024-10-12 14:27:10,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-12 14:27:10,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:27:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:27:10,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-12 14:27:10,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 14:27:10,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:27:11,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276979457] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:11,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:11,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 32 [2024-10-12 14:27:11,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507537487] [2024-10-12 14:27:11,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:11,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-12 14:27:11,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-12 14:27:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-10-12 14:27:11,149 INFO L87 Difference]: Start difference. First operand 393 states and 517 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 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) [2024-10-12 14:27:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:12,610 INFO L93 Difference]: Finished difference Result 730 states and 963 transitions. [2024-10-12 14:27:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-12 14:27:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 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 [2024-10-12 14:27:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:12,614 INFO L225 Difference]: With dead ends: 730 [2024-10-12 14:27:12,614 INFO L226 Difference]: Without dead ends: 659 [2024-10-12 14:27:12,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=3006, Unknown=0, NotChecked=0, Total=3540 [2024-10-12 14:27:12,616 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 329 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:12,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2024 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 14:27:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2024-10-12 14:27:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 406. [2024-10-12 14:27:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 390 states have (on average 1.3) internal successors, (507), 394 states have internal predecessors, (507), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:27:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 528 transitions. [2024-10-12 14:27:12,709 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 528 transitions. Word has length 49 [2024-10-12 14:27:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:12,710 INFO L471 AbstractCegarLoop]: Abstraction has 406 states and 528 transitions. [2024-10-12 14:27:12,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 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) [2024-10-12 14:27:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 528 transitions. [2024-10-12 14:27:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-12 14:27:12,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:12,711 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-12 14:27:12,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-12 14:27:12,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:12,912 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:12,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash -466428061, now seen corresponding path program 3 times [2024-10-12 14:27:12,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:12,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382633186] [2024-10-12 14:27:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:13,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:13,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:27:13,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382633186] [2024-10-12 14:27:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382633186] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786463080] [2024-10-12 14:27:13,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:27:13,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:13,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:13,073 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) [2024-10-12 14:27:13,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-12 14:27:13,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 14:27:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:27:13,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:27:13,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:27:13,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:27:13,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786463080] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:13,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:13,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-10-12 14:27:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471412879] [2024-10-12 14:27:13,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:13,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 14:27:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 14:27:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-10-12 14:27:13,616 INFO L87 Difference]: Start difference. First operand 406 states and 528 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 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) [2024-10-12 14:27:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:14,019 INFO L93 Difference]: Finished difference Result 492 states and 631 transitions. [2024-10-12 14:27:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 14:27:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 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 50 [2024-10-12 14:27:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:14,022 INFO L225 Difference]: With dead ends: 492 [2024-10-12 14:27:14,022 INFO L226 Difference]: Without dead ends: 456 [2024-10-12 14:27:14,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:27:14,023 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 32 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:14,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1014 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:27:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-10-12 14:27:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 409. [2024-10-12 14:27:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 393 states have (on average 1.2951653944020356) internal successors, (509), 397 states have internal predecessors, (509), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 14:27:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 530 transitions. [2024-10-12 14:27:14,115 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 530 transitions. Word has length 50 [2024-10-12 14:27:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:14,116 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 530 transitions. [2024-10-12 14:27:14,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 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) [2024-10-12 14:27:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 530 transitions. [2024-10-12 14:27:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-12 14:27:14,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:14,117 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-10-12 14:27:14,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-12 14:27:14,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:14,318 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:14,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:14,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1021923603, now seen corresponding path program 1 times [2024-10-12 14:27:14,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:14,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298374272] [2024-10-12 14:27:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:14,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:14,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:14,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:14,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 14:27:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:14,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-12 14:27:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:27:14,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:14,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298374272] [2024-10-12 14:27:14,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298374272] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:14,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434614813] [2024-10-12 14:27:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:14,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:14,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:14,498 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) [2024-10-12 14:27:14,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-12 14:27:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:14,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:27:14,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:27:14,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:27:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434614813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:14,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-10-12 14:27:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118244208] [2024-10-12 14:27:14,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:14,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 14:27:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 14:27:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:27:14,794 INFO L87 Difference]: Start difference. First operand 409 states and 530 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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) [2024-10-12 14:27:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:15,061 INFO L93 Difference]: Finished difference Result 464 states and 600 transitions. [2024-10-12 14:27:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:27:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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 53 [2024-10-12 14:27:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:15,063 INFO L225 Difference]: With dead ends: 464 [2024-10-12 14:27:15,063 INFO L226 Difference]: Without dead ends: 385 [2024-10-12 14:27:15,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:27:15,064 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 17 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:15,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 565 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:27:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-10-12 14:27:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 371. [2024-10-12 14:27:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 359 states have (on average 1.2729805013927578) internal successors, (457), 362 states have internal predecessors, (457), 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) [2024-10-12 14:27:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 472 transitions. [2024-10-12 14:27:15,127 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 472 transitions. Word has length 53 [2024-10-12 14:27:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:15,127 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 472 transitions. [2024-10-12 14:27:15,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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) [2024-10-12 14:27:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 472 transitions. [2024-10-12 14:27:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-12 14:27:15,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:15,129 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-10-12 14:27:15,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-12 14:27:15,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:15,330 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:15,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1187589540, now seen corresponding path program 4 times [2024-10-12 14:27:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706712425] [2024-10-12 14:27:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:16,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:16,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:27:16,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706712425] [2024-10-12 14:27:16,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706712425] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782860697] [2024-10-12 14:27:16,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:27:16,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:16,298 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) [2024-10-12 14:27:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-12 14:27:16,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:27:16,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:27:16,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-12 14:27:16,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:27:16,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:27:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782860697] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:17,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:17,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 14] total 40 [2024-10-12 14:27:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670223570] [2024-10-12 14:27:17,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:17,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-12 14:27:17,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-12 14:27:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 14:27:17,533 INFO L87 Difference]: Start difference. First operand 371 states and 472 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 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) [2024-10-12 14:27:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:19,958 INFO L93 Difference]: Finished difference Result 544 states and 688 transitions. [2024-10-12 14:27:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-12 14:27:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 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 51 [2024-10-12 14:27:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:19,960 INFO L225 Difference]: With dead ends: 544 [2024-10-12 14:27:19,960 INFO L226 Difference]: Without dead ends: 437 [2024-10-12 14:27:19,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=523, Invalid=3899, Unknown=0, NotChecked=0, Total=4422 [2024-10-12 14:27:19,964 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 439 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:19,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1300 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-12 14:27:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-10-12 14:27:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 330. [2024-10-12 14:27:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 318 states have (on average 1.2547169811320755) internal successors, (399), 321 states have internal predecessors, (399), 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) [2024-10-12 14:27:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 414 transitions. [2024-10-12 14:27:20,041 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 414 transitions. Word has length 51 [2024-10-12 14:27:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:20,042 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 414 transitions. [2024-10-12 14:27:20,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 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) [2024-10-12 14:27:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 414 transitions. [2024-10-12 14:27:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 14:27:20,043 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:20,043 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] [2024-10-12 14:27:20,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-12 14:27:20,243 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,SelfDestructingSolverStorable33 [2024-10-12 14:27:20,244 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:20,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2033646212, now seen corresponding path program 1 times [2024-10-12 14:27:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:20,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050231439] [2024-10-12 14:27:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:20,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:20,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:20,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:20,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:27:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:20,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-12 14:27:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:27:20,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050231439] [2024-10-12 14:27:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050231439] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088815387] [2024-10-12 14:27:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:20,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:20,859 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) [2024-10-12 14:27:20,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-12 14:27:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:20,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-12 14:27:20,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:25,221 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 [2024-10-12 14:27:25,354 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 [2024-10-12 14:27:25,356 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 [2024-10-12 14:27:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:27:25,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:25,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:27:25,605 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 [2024-10-12 14:27:25,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:27:25,612 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 [2024-10-12 14:27:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:27:25,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088815387] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:25,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:25,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 10] total 36 [2024-10-12 14:27:25,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772265482] [2024-10-12 14:27:25,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:25,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 14:27:25,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 14:27:25,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1080, Unknown=1, NotChecked=66, Total=1260 [2024-10-12 14:27:25,697 INFO L87 Difference]: Start difference. First operand 330 states and 414 transitions. Second operand has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 36 states have internal predecessors, (95), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-12 14:27:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:27:28,147 INFO L93 Difference]: Finished difference Result 524 states and 671 transitions. [2024-10-12 14:27:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-12 14:27:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 36 states have internal predecessors, (95), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 54 [2024-10-12 14:27:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:27:28,149 INFO L225 Difference]: With dead ends: 524 [2024-10-12 14:27:28,149 INFO L226 Difference]: Without dead ends: 446 [2024-10-12 14:27:28,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=789, Invalid=5856, Unknown=1, NotChecked=160, Total=6806 [2024-10-12 14:27:28,151 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 432 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 14:27:28,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 958 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1148 Invalid, 0 Unknown, 422 Unchecked, 0.7s Time] [2024-10-12 14:27:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-10-12 14:27:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 364. [2024-10-12 14:27:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 347 states have (on average 1.2305475504322767) internal successors, (427), 351 states have internal predecessors, (427), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-12 14:27:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2024-10-12 14:27:28,226 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 54 [2024-10-12 14:27:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:27:28,227 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2024-10-12 14:27:28,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 36 states have internal predecessors, (95), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-12 14:27:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2024-10-12 14:27:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-12 14:27:28,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:27:28,228 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-12 14:27:28,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-12 14:27:28,428 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,SelfDestructingSolverStorable34 [2024-10-12 14:27:28,429 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:27:28,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:27:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -15683648, now seen corresponding path program 4 times [2024-10-12 14:27:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:27:28,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070540474] [2024-10-12 14:27:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:27:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:27:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:29,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:27:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:29,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:27:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:27:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:27:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:27:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070540474] [2024-10-12 14:27:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070540474] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:27:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580696933] [2024-10-12 14:27:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:27:29,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:27:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:27:29,406 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) [2024-10-12 14:27:29,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-12 14:27:29,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:27:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:27:29,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-12 14:27:29,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:27:30,074 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 [2024-10-12 14:27:30,079 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 [2024-10-12 14:27:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:27:30,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:27:30,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:27:30,653 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 [2024-10-12 14:27:30,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:27:30,664 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 [2024-10-12 14:27:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:27:31,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580696933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:27:31,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:27:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 18] total 46 [2024-10-12 14:27:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350202004] [2024-10-12 14:27:31,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:27:31,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-12 14:27:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:27:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-12 14:27:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2024-10-12 14:27:31,025 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 44 states have internal predecessors, (92), 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)