./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_max.c -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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:32:21,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:32:21,427 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:32:21,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:32:21,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:32:21,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:32:21,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:32:21,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:32:21,461 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:32:21,463 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:32:21,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:32:21,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:32:21,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:32:21,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:32:21,466 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:32:21,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:32:21,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:32:21,466 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:32:21,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:32:21,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:32:21,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:32:21,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:32:21,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:32:21,471 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:32:21,471 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:32:21,471 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:32:21,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:32:21,471 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:32:21,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:32:21,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:32:21,472 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:32:21,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:32:21,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:32:21,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:32:21,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:32:21,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:32:21,473 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:32:21,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:32:21,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:32:21,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:32:21,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:32:21,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:32:21,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2024-11-18 14:32:21,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:32:21,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:32:21,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:32:21,759 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:32:21,760 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:32:21,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2024-11-18 14:32:23,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:32:23,257 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:32:23,257 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-11-18 14:32:23,263 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065c17656/1b461b261c4742a7ae000eec3c00ec03/FLAG67f7a8b07 [2024-11-18 14:32:23,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065c17656/1b461b261c4742a7ae000eec3c00ec03 [2024-11-18 14:32:23,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:32:23,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:32:23,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:32:23,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:32:23,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:32:23,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a34ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23, skipping insertion in model container [2024-11-18 14:32:23,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:32:23,430 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2024-11-18 14:32:23,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:32:23,452 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:32:23,460 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2024-11-18 14:32:23,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:32:23,482 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:32:23,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23 WrapperNode [2024-11-18 14:32:23,482 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:32:23,483 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:32:23,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:32:23,483 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:32:23,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,494 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,509 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2024-11-18 14:32:23,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:32:23,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:32:23,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:32:23,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:32:23,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,543 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-18 14:32:23,544 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,544 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:32:23,561 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:32:23,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:32:23,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:32:23,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (1/1) ... [2024-11-18 14:32:23,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:32:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:23,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 14:32:23,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 14:32:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-18 14:32:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-18 14:32:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:32:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-11-18 14:32:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-11-18 14:32:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-11-18 14:32:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-11-18 14:32:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:32:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 14:32:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-11-18 14:32:23,640 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-11-18 14:32:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:32:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 14:32:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 14:32:23,724 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:32:23,726 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:32:23,929 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-18 14:32:23,930 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:32:23,939 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:32:23,939 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:32:23,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:32:23 BoogieIcfgContainer [2024-11-18 14:32:23,939 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:32:23,941 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:32:23,941 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:32:23,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:32:23,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:32:23" (1/3) ... [2024-11-18 14:32:23,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9264d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:32:23, skipping insertion in model container [2024-11-18 14:32:23,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:32:23" (2/3) ... [2024-11-18 14:32:23,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9264d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:32:23, skipping insertion in model container [2024-11-18 14:32:23,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:32:23" (3/3) ... [2024-11-18 14:32:23,953 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2024-11-18 14:32:23,966 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:32:23,966 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:32:24,005 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:32:24,011 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;@2c4fa584, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:32:24,011 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:32:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 14:32:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-18 14:32:24,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:24,019 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:24,020 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:24,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1128634237, now seen corresponding path program 1 times [2024-11-18 14:32:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:24,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701724813] [2024-11-18 14:32:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:32:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701724813] [2024-11-18 14:32:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701724813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:32:24,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:32:24,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 14:32:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130267452] [2024-11-18 14:32:24,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:32:24,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 14:32:24,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 14:32:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:32:24,411 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:32:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:24,489 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2024-11-18 14:32:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 14:32:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-18 14:32:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:24,512 INFO L225 Difference]: With dead ends: 70 [2024-11-18 14:32:24,513 INFO L226 Difference]: Without dead ends: 36 [2024-11-18 14:32:24,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:32:24,521 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:24,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:32:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-18 14:32:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-18 14:32:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-18 14:32:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-18 14:32:24,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2024-11-18 14:32:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:24,558 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-18 14:32:24,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:32:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-18 14:32:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-18 14:32:24,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:24,562 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:24,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:32:24,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:24,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash 92344634, now seen corresponding path program 1 times [2024-11-18 14:32:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:24,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246823749] [2024-11-18 14:32:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 14:32:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246823749] [2024-11-18 14:32:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246823749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:32:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:32:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-18 14:32:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922340767] [2024-11-18 14:32:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:32:24,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 14:32:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 14:32:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:32:24,758 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 14:32:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:24,810 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-11-18 14:32:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:32:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-18 14:32:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:24,813 INFO L225 Difference]: With dead ends: 49 [2024-11-18 14:32:24,813 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 14:32:24,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:32:24,814 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:24,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:32:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 14:32:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 14:32:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-18 14:32:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-18 14:32:24,824 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 31 [2024-11-18 14:32:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:24,825 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-18 14:32:24,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 14:32:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-18 14:32:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 14:32:24,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:24,828 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-18 14:32:24,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:32:24,828 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:24,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash 962263030, now seen corresponding path program 1 times [2024-11-18 14:32:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:24,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961635681] [2024-11-18 14:32:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 14:32:25,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:25,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961635681] [2024-11-18 14:32:25,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961635681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:25,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023497772] [2024-11-18 14:32:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:25,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:25,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:25,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:32:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:25,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-18 14:32:25,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:25,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 14:32:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 14:32:25,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:26,244 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-18 14:32:26,244 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 13 treesize of output 13 [2024-11-18 14:32:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:32:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023497772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:32:26,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:32:26,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2024-11-18 14:32:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865420346] [2024-11-18 14:32:26,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:26,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:32:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:32:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:32:26,278 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-18 14:32:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:26,659 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-11-18 14:32:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:32:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 44 [2024-11-18 14:32:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:26,661 INFO L225 Difference]: With dead ends: 47 [2024-11-18 14:32:26,661 INFO L226 Difference]: Without dead ends: 45 [2024-11-18 14:32:26,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-11-18 14:32:26,662 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:26,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 187 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:32:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-18 14:32:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-11-18 14:32:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-18 14:32:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-18 14:32:26,668 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 44 [2024-11-18 14:32:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:26,669 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-18 14:32:26,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-18 14:32:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-18 14:32:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 14:32:26,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:26,670 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-18 14:32:26,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:26,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:26,871 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:26,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1004737340, now seen corresponding path program 1 times [2024-11-18 14:32:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346045619] [2024-11-18 14:32:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-18 14:32:27,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346045619] [2024-11-18 14:32:27,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346045619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305262427] [2024-11-18 14:32:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:27,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:27,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:27,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:27,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:32:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:27,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-18 14:32:27,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:27,629 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 13 treesize of output 9 [2024-11-18 14:32:27,635 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 13 treesize of output 9 [2024-11-18 14:32:27,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 13 [2024-11-18 14:32:27,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-18 14:32:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 14:32:28,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 14:32:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305262427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:32:28,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:32:28,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 29 [2024-11-18 14:32:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348681900] [2024-11-18 14:32:28,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:28,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-18 14:32:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:28,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-18 14:32:28,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:32:28,369 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-18 14:32:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:29,567 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2024-11-18 14:32:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-18 14:32:29,568 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 50 [2024-11-18 14:32:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:29,570 INFO L225 Difference]: With dead ends: 114 [2024-11-18 14:32:29,570 INFO L226 Difference]: Without dead ends: 100 [2024-11-18 14:32:29,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 14:32:29,572 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:29,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 355 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 14:32:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-18 14:32:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2024-11-18 14:32:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 63 states have internal predecessors, (74), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (35), 16 states have call predecessors, (35), 13 states have call successors, (35) [2024-11-18 14:32:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2024-11-18 14:32:29,586 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 50 [2024-11-18 14:32:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:29,587 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2024-11-18 14:32:29,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-18 14:32:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2024-11-18 14:32:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 14:32:29,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:29,589 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-18 14:32:29,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:32:29,793 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,SelfDestructingSolverStorable3 [2024-11-18 14:32:29,794 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:29,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1121100986, now seen corresponding path program 1 times [2024-11-18 14:32:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585393052] [2024-11-18 14:32:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:32:30,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:30,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585393052] [2024-11-18 14:32:30,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585393052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088981469] [2024-11-18 14:32:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:30,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:30,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:30,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:32:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:30,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-18 14:32:30,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:30,244 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 13 treesize of output 9 [2024-11-18 14:32:30,247 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 13 treesize of output 9 [2024-11-18 14:32:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:32:30,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:32:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088981469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:32:30,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:32:30,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 20 [2024-11-18 14:32:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164448747] [2024-11-18 14:32:30,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:30,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 14:32:30,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 14:32:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:32:30,582 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-18 14:32:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:30,846 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2024-11-18 14:32:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:32:30,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 50 [2024-11-18 14:32:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:30,848 INFO L225 Difference]: With dead ends: 150 [2024-11-18 14:32:30,849 INFO L226 Difference]: Without dead ends: 107 [2024-11-18 14:32:30,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-18 14:32:30,850 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:30,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 489 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:32:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-18 14:32:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-11-18 14:32:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 17 states have call successors, (17), 8 states have call predecessors, (17), 11 states have return successors, (35), 18 states have call predecessors, (35), 12 states have call successors, (35) [2024-11-18 14:32:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2024-11-18 14:32:30,883 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 50 [2024-11-18 14:32:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:30,883 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2024-11-18 14:32:30,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-18 14:32:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2024-11-18 14:32:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-18 14:32:30,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:30,887 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:30,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:31,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:31,092 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:31,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:31,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1563658441, now seen corresponding path program 2 times [2024-11-18 14:32:31,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:31,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628400999] [2024-11-18 14:32:31,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:31,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:31,130 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:31,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 14:32:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628400999] [2024-11-18 14:32:31,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628400999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530894851] [2024-11-18 14:32:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:31,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:31,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:32:31,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:31,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:31,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-18 14:32:31,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:31,755 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 19 treesize of output 1 [2024-11-18 14:32:31,757 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 13 treesize of output 9 [2024-11-18 14:32:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-18 14:32:32,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-18 14:32:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530894851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:32:32,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:32:32,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 43 [2024-11-18 14:32:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508546718] [2024-11-18 14:32:32,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:32,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-18 14:32:32,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-18 14:32:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 14:32:32,577 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 43 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 34 states have internal predecessors, (75), 15 states have call successors, (18), 6 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-18 14:32:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:33,062 INFO L93 Difference]: Finished difference Result 149 states and 207 transitions. [2024-11-18 14:32:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 14:32:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 34 states have internal predecessors, (75), 15 states have call successors, (18), 6 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) Word has length 62 [2024-11-18 14:32:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:33,064 INFO L225 Difference]: With dead ends: 149 [2024-11-18 14:32:33,064 INFO L226 Difference]: Without dead ends: 130 [2024-11-18 14:32:33,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=2246, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 14:32:33,069 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:33,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 739 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:32:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-18 14:32:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-11-18 14:32:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 76 states have internal predecessors, (92), 17 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (42), 20 states have call predecessors, (42), 12 states have call successors, (42) [2024-11-18 14:32:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2024-11-18 14:32:33,092 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 62 [2024-11-18 14:32:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:33,092 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2024-11-18 14:32:33,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 34 states have internal predecessors, (75), 15 states have call successors, (18), 6 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-18 14:32:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2024-11-18 14:32:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-18 14:32:33,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:33,094 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:33,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:32:33,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:33,295 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:33,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:33,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1539805773, now seen corresponding path program 3 times [2024-11-18 14:32:33,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:33,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915379859] [2024-11-18 14:32:33,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:32:33,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:33,345 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 14:32:33,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:32:34,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:34,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915379859] [2024-11-18 14:32:34,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915379859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:34,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102014079] [2024-11-18 14:32:34,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:32:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:34,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:34,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:32:34,850 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 14:32:34,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:34,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-18 14:32:34,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:34,985 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 11 treesize of output 7 [2024-11-18 14:32:34,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 14:32:36,008 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 21 treesize of output 13 [2024-11-18 14:32:36,175 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 17 treesize of output 9 [2024-11-18 14:32:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 26 proven. 27 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-18 14:32:36,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:36,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:32:36,729 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 31 treesize of output 34 [2024-11-18 14:32:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102014079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:36,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:32:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 60 [2024-11-18 14:32:36,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965620995] [2024-11-18 14:32:36,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:36,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-18 14:32:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-18 14:32:36,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3837, Unknown=0, NotChecked=0, Total=4032 [2024-11-18 14:32:36,907 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 60 states, 50 states have (on average 1.74) internal successors, (87), 45 states have internal predecessors, (87), 18 states have call successors, (21), 8 states have call predecessors, (21), 16 states have return successors, (19), 18 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-18 14:32:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:39,394 INFO L93 Difference]: Finished difference Result 213 states and 347 transitions. [2024-11-18 14:32:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-18 14:32:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 50 states have (on average 1.74) internal successors, (87), 45 states have internal predecessors, (87), 18 states have call successors, (21), 8 states have call predecessors, (21), 16 states have return successors, (19), 18 states have call predecessors, (19), 14 states have call successors, (19) Word has length 75 [2024-11-18 14:32:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:39,397 INFO L225 Difference]: With dead ends: 213 [2024-11-18 14:32:39,397 INFO L226 Difference]: Without dead ends: 211 [2024-11-18 14:32:39,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=651, Invalid=9449, Unknown=0, NotChecked=0, Total=10100 [2024-11-18 14:32:39,400 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:39,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 582 Invalid, 3080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-18 14:32:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-18 14:32:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 161. [2024-11-18 14:32:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 119 states have internal predecessors, (142), 23 states have call successors, (23), 12 states have call predecessors, (23), 23 states have return successors, (94), 29 states have call predecessors, (94), 15 states have call successors, (94) [2024-11-18 14:32:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 259 transitions. [2024-11-18 14:32:39,421 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 259 transitions. Word has length 75 [2024-11-18 14:32:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:39,421 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 259 transitions. [2024-11-18 14:32:39,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 50 states have (on average 1.74) internal successors, (87), 45 states have internal predecessors, (87), 18 states have call successors, (21), 8 states have call predecessors, (21), 16 states have return successors, (19), 18 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-18 14:32:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 259 transitions. [2024-11-18 14:32:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-18 14:32:39,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:39,423 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:39,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:39,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:39,623 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:39,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash 817966526, now seen corresponding path program 1 times [2024-11-18 14:32:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:39,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925854707] [2024-11-18 14:32:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:39,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 14:32:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925854707] [2024-11-18 14:32:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925854707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215257242] [2024-11-18 14:32:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:41,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:41,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:32:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:41,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-18 14:32:41,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:41,354 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 19 treesize of output 1 [2024-11-18 14:32:41,355 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 13 treesize of output 9 [2024-11-18 14:32:42,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:32:42,743 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2024-11-18 14:32:42,751 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-18 14:32:42,751 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 19 treesize of output 7 [2024-11-18 14:32:42,934 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 17 treesize of output 9 [2024-11-18 14:32:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-18 14:32:42,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:43,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:32:43,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-18 14:32:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215257242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:44,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:32:44,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 61 [2024-11-18 14:32:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599220500] [2024-11-18 14:32:44,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:44,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-18 14:32:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-18 14:32:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=5453, Unknown=0, NotChecked=0, Total=5700 [2024-11-18 14:32:44,380 INFO L87 Difference]: Start difference. First operand 161 states and 259 transitions. Second operand has 61 states, 50 states have (on average 1.7) internal successors, (85), 46 states have internal predecessors, (85), 18 states have call successors, (23), 8 states have call predecessors, (23), 15 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-18 14:32:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:48,293 INFO L93 Difference]: Finished difference Result 474 states and 874 transitions. [2024-11-18 14:32:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-18 14:32:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 50 states have (on average 1.7) internal successors, (85), 46 states have internal predecessors, (85), 18 states have call successors, (23), 8 states have call predecessors, (23), 15 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) Word has length 76 [2024-11-18 14:32:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:48,296 INFO L225 Difference]: With dead ends: 474 [2024-11-18 14:32:48,297 INFO L226 Difference]: Without dead ends: 353 [2024-11-18 14:32:48,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3599 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=870, Invalid=15642, Unknown=0, NotChecked=0, Total=16512 [2024-11-18 14:32:48,310 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:48,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 406 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-18 14:32:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-18 14:32:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 211. [2024-11-18 14:32:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 157 states have (on average 1.286624203821656) internal successors, (202), 152 states have internal predecessors, (202), 25 states have call successors, (25), 12 states have call predecessors, (25), 28 states have return successors, (137), 46 states have call predecessors, (137), 17 states have call successors, (137) [2024-11-18 14:32:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 364 transitions. [2024-11-18 14:32:48,381 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 364 transitions. Word has length 76 [2024-11-18 14:32:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:48,381 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 364 transitions. [2024-11-18 14:32:48,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 50 states have (on average 1.7) internal successors, (85), 46 states have internal predecessors, (85), 18 states have call successors, (23), 8 states have call predecessors, (23), 15 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-18 14:32:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 364 transitions. [2024-11-18 14:32:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-18 14:32:48,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:48,391 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:48,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:48,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:48,596 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:48,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1714423632, now seen corresponding path program 2 times [2024-11-18 14:32:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:48,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287186791] [2024-11-18 14:32:48,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:48,617 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:48,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-18 14:32:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:48,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287186791] [2024-11-18 14:32:48,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287186791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:48,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530847827] [2024-11-18 14:32:48,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:48,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:48,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:48,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:48,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:32:48,890 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:48,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:48,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:32:48,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-18 14:32:48,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-18 14:32:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530847827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:32:49,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:32:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 20 [2024-11-18 14:32:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124863641] [2024-11-18 14:32:49,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:49,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 14:32:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 14:32:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:32:49,281 INFO L87 Difference]: Start difference. First operand 211 states and 364 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-18 14:32:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:49,527 INFO L93 Difference]: Finished difference Result 430 states and 846 transitions. [2024-11-18 14:32:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-18 14:32:49,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-11-18 14:32:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:49,530 INFO L225 Difference]: With dead ends: 430 [2024-11-18 14:32:49,533 INFO L226 Difference]: Without dead ends: 259 [2024-11-18 14:32:49,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 14:32:49,536 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:49,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 664 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:32:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-18 14:32:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 217. [2024-11-18 14:32:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 159 states have (on average 1.220125786163522) internal successors, (194), 158 states have internal predecessors, (194), 25 states have call successors, (25), 12 states have call predecessors, (25), 32 states have return successors, (160), 46 states have call predecessors, (160), 17 states have call successors, (160) [2024-11-18 14:32:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 379 transitions. [2024-11-18 14:32:49,579 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 379 transitions. Word has length 76 [2024-11-18 14:32:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:49,579 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 379 transitions. [2024-11-18 14:32:49,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-18 14:32:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 379 transitions. [2024-11-18 14:32:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-18 14:32:49,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:49,585 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:49,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 14:32:49,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:49,786 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:49,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1380137023, now seen corresponding path program 1 times [2024-11-18 14:32:49,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:49,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142256561] [2024-11-18 14:32:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-18 14:32:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:50,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142256561] [2024-11-18 14:32:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142256561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632540647] [2024-11-18 14:32:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:50,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:50,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:32:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:50,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-18 14:32:50,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:50,990 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 13 treesize of output 9 [2024-11-18 14:32:50,993 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 19 treesize of output 1 [2024-11-18 14:32:52,067 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 25 treesize of output 13 [2024-11-18 14:32:52,198 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 17 treesize of output 9 [2024-11-18 14:32:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-18 14:32:52,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:53,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:32:53,119 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 33 treesize of output 36 [2024-11-18 14:32:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632540647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:53,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:32:53,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 57 [2024-11-18 14:32:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709067953] [2024-11-18 14:32:53,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:53,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-18 14:32:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-18 14:32:53,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5007, Unknown=0, NotChecked=0, Total=5256 [2024-11-18 14:32:53,722 INFO L87 Difference]: Start difference. First operand 217 states and 379 transitions. Second operand has 57 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 40 states have internal predecessors, (73), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-18 14:32:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:55,620 INFO L93 Difference]: Finished difference Result 289 states and 502 transitions. [2024-11-18 14:32:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-18 14:32:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 40 states have internal predecessors, (73), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 77 [2024-11-18 14:32:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:55,622 INFO L225 Difference]: With dead ends: 289 [2024-11-18 14:32:55,622 INFO L226 Difference]: Without dead ends: 287 [2024-11-18 14:32:55,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=474, Invalid=8646, Unknown=0, NotChecked=0, Total=9120 [2024-11-18 14:32:55,625 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 53 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:55,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 918 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-18 14:32:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-18 14:32:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 228. [2024-11-18 14:32:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 168 states have (on average 1.2261904761904763) internal successors, (206), 167 states have internal predecessors, (206), 25 states have call successors, (25), 12 states have call predecessors, (25), 34 states have return successors, (172), 48 states have call predecessors, (172), 17 states have call successors, (172) [2024-11-18 14:32:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 403 transitions. [2024-11-18 14:32:55,647 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 403 transitions. Word has length 77 [2024-11-18 14:32:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:55,647 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 403 transitions. [2024-11-18 14:32:55,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 40 states have internal predecessors, (73), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-18 14:32:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 403 transitions. [2024-11-18 14:32:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-18 14:32:55,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:55,649 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:55,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 14:32:55,850 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,SelfDestructingSolverStorable9 [2024-11-18 14:32:55,850 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:55,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1407278464, now seen corresponding path program 1 times [2024-11-18 14:32:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327217602] [2024-11-18 14:32:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:55,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-18 14:32:57,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327217602] [2024-11-18 14:32:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327217602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450271214] [2024-11-18 14:32:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:57,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:57,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:57,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:57,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:32:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:57,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-18 14:32:57,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:57,654 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 19 treesize of output 1 [2024-11-18 14:32:57,656 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 13 treesize of output 9 [2024-11-18 14:32:58,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:32:58,618 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2024-11-18 14:32:58,624 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-18 14:32:58,626 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 19 treesize of output 7 [2024-11-18 14:32:58,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 14:32:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:32:58,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:59,267 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-11-18 14:32:59,267 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 25 treesize of output 25 [2024-11-18 14:32:59,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450271214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:59,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:32:59,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 51 [2024-11-18 14:32:59,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242027565] [2024-11-18 14:32:59,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:59,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-18 14:32:59,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-18 14:32:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3953, Unknown=0, NotChecked=0, Total=4160 [2024-11-18 14:32:59,566 INFO L87 Difference]: Start difference. First operand 228 states and 403 transitions. Second operand has 51 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 17 states have call successors, (22), 7 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-18 14:33:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:33:01,992 INFO L93 Difference]: Finished difference Result 436 states and 762 transitions. [2024-11-18 14:33:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-18 14:33:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 17 states have call successors, (22), 7 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) Word has length 77 [2024-11-18 14:33:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:33:02,008 INFO L225 Difference]: With dead ends: 436 [2024-11-18 14:33:02,008 INFO L226 Difference]: Without dead ends: 434 [2024-11-18 14:33:02,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=569, Invalid=9331, Unknown=0, NotChecked=0, Total=9900 [2024-11-18 14:33:02,009 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:33:02,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 325 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-18 14:33:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2024-11-18 14:33:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 222. [2024-11-18 14:33:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 165 states have (on average 1.2303030303030302) internal successors, (203), 161 states have internal predecessors, (203), 25 states have call successors, (25), 12 states have call predecessors, (25), 31 states have return successors, (154), 48 states have call predecessors, (154), 17 states have call successors, (154) [2024-11-18 14:33:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 382 transitions. [2024-11-18 14:33:02,047 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 382 transitions. Word has length 77 [2024-11-18 14:33:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:33:02,047 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 382 transitions. [2024-11-18 14:33:02,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 17 states have call successors, (22), 7 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-18 14:33:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 382 transitions. [2024-11-18 14:33:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-18 14:33:02,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:33:02,049 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:33:02,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 14:33:02,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:33:02,254 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:33:02,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:33:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 983013763, now seen corresponding path program 2 times [2024-11-18 14:33:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:33:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837433752] [2024-11-18 14:33:02,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:33:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:33:02,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:33:02,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:33:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 14:33:02,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:33:02,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837433752] [2024-11-18 14:33:02,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837433752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:33:02,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576358656] [2024-11-18 14:33:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:33:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:33:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:33:02,523 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:33:02,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:33:02,644 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:33:02,644 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:33:02,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-18 14:33:02,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:33:02,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-18 14:33:02,732 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 11 treesize of output 7 [2024-11-18 14:33:02,736 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 11 treesize of output 7 [2024-11-18 14:33:02,858 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_48 Int)) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_48) 0) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| v_nondet_tree_~n~0.base_48 (select |c_#memory_$Pointer$#1.offset| v_nondet_tree_~n~0.base_48))) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| v_nondet_tree_~n~0.base_48 (select |c_#memory_$Pointer$#1.base| v_nondet_tree_~n~0.base_48))))) is different from true [2024-11-18 14:33:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 14:33:02,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-18 14:33:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 14:33:02,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-18 14:33:02,888 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-18 14:33:02,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-18 14:33:02,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-18 14:33:02,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-18 14:33:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 8 not checked. [2024-11-18 14:33:39,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:33:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576358656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:33:39,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:33:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2024-11-18 14:33:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056036342] [2024-11-18 14:33:39,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:33:39,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-18 14:33:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:33:39,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-18 14:33:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1151, Unknown=10, NotChecked=68, Total=1332 [2024-11-18 14:33:39,700 INFO L87 Difference]: Start difference. First operand 222 states and 382 transitions. Second operand has 33 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 28 states have internal predecessors, (71), 14 states have call successors, (21), 7 states have call predecessors, (21), 13 states have return successors, (20), 14 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-18 14:33:43,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:33:51,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:33:59,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]