./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 06:37:41,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 06:37:41,230 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 06:37:41,234 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 06:37:41,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 06:37:41,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 06:37:41,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 06:37:41,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 06:37:41,269 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 06:37:41,270 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 06:37:41,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 06:37:41,271 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 06:37:41,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 06:37:41,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 06:37:41,274 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 06:37:41,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 06:37:41,275 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 06:37:41,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 06:37:41,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 06:37:41,276 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 06:37:41,276 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 06:37:41,280 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 06:37:41,281 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 06:37:41,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 06:37:41,281 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 06:37:41,281 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 06:37:41,281 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 06:37:41,282 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 06:37:41,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 06:37:41,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 06:37:41,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 06:37:41,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 06:37:41,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 06:37:41,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:37:41,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 06:37:41,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 06:37:41,285 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 06:37:41,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 06:37:41,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 06:37:41,285 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 06:37:41,286 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 06:37:41,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 06:37:41,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-11-19 06:37:41,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 06:37:41,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 06:37:41,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 06:37:41,587 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 06:37:41,588 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 06:37:41,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-19 06:37:43,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 06:37:43,281 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 06:37:43,282 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-19 06:37:43,290 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4dc1e4f3/633dec76bc244053a992abf9a481a15a/FLAGab8da5cd6 [2024-11-19 06:37:43,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4dc1e4f3/633dec76bc244053a992abf9a481a15a [2024-11-19 06:37:43,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 06:37:43,310 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 06:37:43,311 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 06:37:43,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 06:37:43,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 06:37:43,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410a4b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43, skipping insertion in model container [2024-11-19 06:37:43,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,347 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 06:37:43,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:37:43,554 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 06:37:43,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:37:43,597 INFO L204 MainTranslator]: Completed translation [2024-11-19 06:37:43,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43 WrapperNode [2024-11-19 06:37:43,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 06:37:43,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 06:37:43,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 06:37:43,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 06:37:43,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,637 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-11-19 06:37:43,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 06:37:43,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 06:37:43,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 06:37:43,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 06:37:43,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,670 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-19 06:37:43,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,685 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 06:37:43,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 06:37:43,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 06:37:43,690 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 06:37:43,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (1/1) ... [2024-11-19 06:37:43,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:37:43,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:43,730 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) [2024-11-19 06:37:43,737 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 [2024-11-19 06:37:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 06:37:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-19 06:37:43,789 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-19 06:37:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 06:37:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 06:37:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-11-19 06:37:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-11-19 06:37:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 06:37:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 06:37:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 06:37:43,791 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-11-19 06:37:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-11-19 06:37:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 06:37:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 06:37:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 06:37:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 06:37:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-19 06:37:43,794 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-19 06:37:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 06:37:43,920 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 06:37:43,926 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 06:37:44,347 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-19 06:37:44,348 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 06:37:44,371 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 06:37:44,371 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 06:37:44,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:44 BoogieIcfgContainer [2024-11-19 06:37:44,372 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 06:37:44,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 06:37:44,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 06:37:44,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 06:37:44,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:37:43" (1/3) ... [2024-11-19 06:37:44,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ec5ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:44, skipping insertion in model container [2024-11-19 06:37:44,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:43" (2/3) ... [2024-11-19 06:37:44,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ec5ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:44, skipping insertion in model container [2024-11-19 06:37:44,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:44" (3/3) ... [2024-11-19 06:37:44,383 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-11-19 06:37:44,401 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 06:37:44,401 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-19 06:37:44,462 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 06:37:44,470 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=None, 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;@585cf518, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 06:37:44,471 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-11-19 06:37:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 06:37:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 06:37:44,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:44,485 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:44,486 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:44,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1272586388, now seen corresponding path program 1 times [2024-11-19 06:37:44,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235035022] [2024-11-19 06:37:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:44,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 06:37:44,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:44,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235035022] [2024-11-19 06:37:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235035022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:44,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863618149] [2024-11-19 06:37:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:44,751 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) [2024-11-19 06:37:44,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 06:37:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:44,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-19 06:37:44,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:37:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 06:37:44,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:37:44,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863618149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:37:44,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 06:37:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-19 06:37:44,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808978639] [2024-11-19 06:37:44,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:37:44,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 06:37:44,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 06:37:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 06:37:44,922 INFO L87 Difference]: Start difference. First operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 06:37:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:44,948 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2024-11-19 06:37:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 06:37:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-19 06:37:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:44,957 INFO L225 Difference]: With dead ends: 106 [2024-11-19 06:37:44,957 INFO L226 Difference]: Without dead ends: 104 [2024-11-19 06:37:44,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 06:37:44,962 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:44,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:37:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-19 06:37:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-19 06:37:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 06:37:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-19 06:37:45,010 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 29 [2024-11-19 06:37:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:45,010 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-19 06:37:45,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 06:37:45,011 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-19 06:37:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 06:37:45,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:45,013 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:45,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 06:37:45,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-19 06:37:45,218 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:45,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash 392066644, now seen corresponding path program 1 times [2024-11-19 06:37:45,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:45,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153297271] [2024-11-19 06:37:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:45,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153297271] [2024-11-19 06:37:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153297271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:37:45,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:37:45,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:37:45,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697413920] [2024-11-19 06:37:45,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:37:45,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:37:45,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:37:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:37:45,588 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:37:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:45,734 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2024-11-19 06:37:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:37:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-19 06:37:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:45,737 INFO L225 Difference]: With dead ends: 101 [2024-11-19 06:37:45,738 INFO L226 Difference]: Without dead ends: 101 [2024-11-19 06:37:45,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:37:45,740 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 27 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:45,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 209 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:37:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-19 06:37:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-19 06:37:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.625) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 06:37:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-19 06:37:45,758 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 29 [2024-11-19 06:37:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:45,759 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-19 06:37:45,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:37:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-19 06:37:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 06:37:45,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:45,761 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:45,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 06:37:45,761 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:45,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash 392066645, now seen corresponding path program 1 times [2024-11-19 06:37:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:45,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394549504] [2024-11-19 06:37:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:45,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394549504] [2024-11-19 06:37:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394549504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:37:46,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:37:46,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 06:37:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132595636] [2024-11-19 06:37:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:37:46,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 06:37:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 06:37:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-19 06:37:46,660 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:37:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:47,146 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2024-11-19 06:37:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:37:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-11-19 06:37:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:47,149 INFO L225 Difference]: With dead ends: 126 [2024-11-19 06:37:47,149 INFO L226 Difference]: Without dead ends: 126 [2024-11-19 06:37:47,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-19 06:37:47,150 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 68 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:47,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 530 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:37:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-19 06:37:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2024-11-19 06:37:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.578125) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 06:37:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-11-19 06:37:47,161 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 29 [2024-11-19 06:37:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:47,162 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-11-19 06:37:47,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:37:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-11-19 06:37:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:37:47,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:47,163 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:47,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 06:37:47,164 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:47,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:47,164 INFO L85 PathProgramCache]: Analyzing trace with hash -730835859, now seen corresponding path program 1 times [2024-11-19 06:37:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:47,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493043908] [2024-11-19 06:37:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:47,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493043908] [2024-11-19 06:37:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493043908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:37:47,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:37:47,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 06:37:47,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905328685] [2024-11-19 06:37:47,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:37:47,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:37:47,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:37:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:37:47,501 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:37:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:47,715 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2024-11-19 06:37:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:37:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-11-19 06:37:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:47,719 INFO L225 Difference]: With dead ends: 116 [2024-11-19 06:37:47,720 INFO L226 Difference]: Without dead ends: 116 [2024-11-19 06:37:47,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 06:37:47,722 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:47,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 348 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:37:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-19 06:37:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2024-11-19 06:37:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 97 states have internal predecessors, (107), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 06:37:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2024-11-19 06:37:47,740 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 30 [2024-11-19 06:37:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:47,741 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2024-11-19 06:37:47,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:37:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2024-11-19 06:37:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:37:47,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:47,742 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:47,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 06:37:47,743 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:47,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash -730835860, now seen corresponding path program 1 times [2024-11-19 06:37:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234150504] [2024-11-19 06:37:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:47,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:47,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234150504] [2024-11-19 06:37:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234150504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:37:47,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:37:47,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:37:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535570129] [2024-11-19 06:37:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:37:47,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:37:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:37:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:37:47,817 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 06:37:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:47,896 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2024-11-19 06:37:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:37:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-19 06:37:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:47,898 INFO L225 Difference]: With dead ends: 114 [2024-11-19 06:37:47,898 INFO L226 Difference]: Without dead ends: 114 [2024-11-19 06:37:47,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:37:47,899 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 27 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:47,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 216 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:37:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-19 06:37:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-19 06:37:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 96 states have internal predecessors, (105), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 06:37:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2024-11-19 06:37:47,912 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 30 [2024-11-19 06:37:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:47,912 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2024-11-19 06:37:47,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 06:37:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2024-11-19 06:37:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:37:47,913 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:47,913 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:47,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 06:37:47,914 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:47,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash 529290709, now seen corresponding path program 1 times [2024-11-19 06:37:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:47,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335532470] [2024-11-19 06:37:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:47,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:48,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335532470] [2024-11-19 06:37:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335532470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191096372] [2024-11-19 06:37:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:48,477 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) [2024-11-19 06:37:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 06:37:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:48,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 06:37:48,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:37:48,689 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 [2024-11-19 06:37:48,705 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 8 treesize of output 7 [2024-11-19 06:37:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:37:48,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 32 [2024-11-19 06:37:49,010 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:37:49,011 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 [2024-11-19 06:37:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 06:37:49,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:37:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191096372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:49,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:37:49,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2024-11-19 06:37:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006881442] [2024-11-19 06:37:49,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:37:49,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 06:37:49,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 06:37:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-19 06:37:49,559 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 06:37:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:50,674 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2024-11-19 06:37:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 06:37:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2024-11-19 06:37:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:50,676 INFO L225 Difference]: With dead ends: 113 [2024-11-19 06:37:50,676 INFO L226 Difference]: Without dead ends: 113 [2024-11-19 06:37:50,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2024-11-19 06:37:50,678 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 171 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:50,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 507 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 06:37:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-19 06:37:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2024-11-19 06:37:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 06:37:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-19 06:37:50,686 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 30 [2024-11-19 06:37:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:50,686 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-19 06:37:50,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 06:37:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-19 06:37:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-19 06:37:50,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:50,687 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-19 06:37:50,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 06:37:50,891 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,SelfDestructingSolverStorable5 [2024-11-19 06:37:50,892 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:50,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1141814566, now seen corresponding path program 1 times [2024-11-19 06:37:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:50,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513476852] [2024-11-19 06:37:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:50,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 06:37:51,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:51,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513476852] [2024-11-19 06:37:51,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513476852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:51,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730647332] [2024-11-19 06:37:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:51,140 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) [2024-11-19 06:37:51,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 06:37:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:51,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 06:37:51,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:37:51,253 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 [2024-11-19 06:37:51,265 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 8 treesize of output 1 [2024-11-19 06:37:51,379 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:37:51,380 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 [2024-11-19 06:37:51,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2024-11-19 06:37:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:37:51,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:37:52,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730647332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:52,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:37:52,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2024-11-19 06:37:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102552217] [2024-11-19 06:37:52,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:37:52,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 06:37:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 06:37:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-11-19 06:37:52,297 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:37:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:53,839 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2024-11-19 06:37:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 06:37:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-11-19 06:37:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:53,841 INFO L225 Difference]: With dead ends: 110 [2024-11-19 06:37:53,841 INFO L226 Difference]: Without dead ends: 107 [2024-11-19 06:37:53,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 06:37:53,842 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 204 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:53,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 659 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-19 06:37:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-19 06:37:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-11-19 06:37:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.507936507936508) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 06:37:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-19 06:37:53,848 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 33 [2024-11-19 06:37:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:53,848 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-19 06:37:53,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:37:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-19 06:37:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-19 06:37:53,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:53,849 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:53,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 06:37:54,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:54,054 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:54,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash 826925320, now seen corresponding path program 1 times [2024-11-19 06:37:54,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:54,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832990593] [2024-11-19 06:37:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:54,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:37:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832990593] [2024-11-19 06:37:54,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832990593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506220187] [2024-11-19 06:37:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:54,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:54,361 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) [2024-11-19 06:37:54,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 06:37:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:54,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 06:37:54,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:37:54,446 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 10 treesize of output 9 [2024-11-19 06:37:54,569 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-19 06:37:54,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-19 06:37:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:37:54,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:37:55,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506220187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:55,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:37:55,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-11-19 06:37:55,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106994669] [2024-11-19 06:37:55,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:37:55,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 06:37:55,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 06:37:55,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-19 06:37:55,267 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 06:37:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:55,777 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-11-19 06:37:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 06:37:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-11-19 06:37:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:55,778 INFO L225 Difference]: With dead ends: 104 [2024-11-19 06:37:55,778 INFO L226 Difference]: Without dead ends: 104 [2024-11-19 06:37:55,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-11-19 06:37:55,779 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 101 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:55,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 459 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:37:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-19 06:37:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-19 06:37:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.492063492063492) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 06:37:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-19 06:37:55,787 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 35 [2024-11-19 06:37:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:55,788 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-19 06:37:55,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 06:37:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-19 06:37:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 06:37:55,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:55,792 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:55,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 06:37:55,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:55,993 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:55,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1000164257, now seen corresponding path program 1 times [2024-11-19 06:37:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846580356] [2024-11-19 06:37:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 06:37:56,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:56,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846580356] [2024-11-19 06:37:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846580356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773012336] [2024-11-19 06:37:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:37:56,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:56,291 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) [2024-11-19 06:37:56,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 06:37:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:37:56,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 06:37:56,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:37:56,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 3 [2024-11-19 06:37:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:56,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:37:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:57,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773012336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:37:57,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:37:57,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 29 [2024-11-19 06:37:57,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239795515] [2024-11-19 06:37:57,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:37:57,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 06:37:57,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 06:37:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-11-19 06:37:57,193 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 29 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 7 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-19 06:37:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:37:57,554 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2024-11-19 06:37:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 06:37:57,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 7 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2024-11-19 06:37:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:37:57,556 INFO L225 Difference]: With dead ends: 126 [2024-11-19 06:37:57,556 INFO L226 Difference]: Without dead ends: 126 [2024-11-19 06:37:57,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2024-11-19 06:37:57,557 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 36 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:37:57,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1068 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:37:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-19 06:37:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2024-11-19 06:37:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 104 states have internal predecessors, (110), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 06:37:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2024-11-19 06:37:57,567 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 38 [2024-11-19 06:37:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:37:57,567 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2024-11-19 06:37:57,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 7 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-19 06:37:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2024-11-19 06:37:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 06:37:57,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:37:57,568 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:37:57,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 06:37:57,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:57,769 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:37:57,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:37:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1122482977, now seen corresponding path program 2 times [2024-11-19 06:37:57,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:37:57,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003001484] [2024-11-19 06:37:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:37:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:37:57,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:37:57,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:37:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:37:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:37:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003001484] [2024-11-19 06:37:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003001484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825430263] [2024-11-19 06:37:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:37:58,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:37:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:37:58,306 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) [2024-11-19 06:37:58,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 06:37:58,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:37:58,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:37:58,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 06:37:58,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:37:58,584 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 10 treesize of output 9 [2024-11-19 06:37:58,588 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 [2024-11-19 06:37:58,749 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:37:58,750 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 [2024-11-19 06:37:58,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2024-11-19 06:37:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 06:37:59,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:37:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825430263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:37:59,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:37:59,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2024-11-19 06:37:59,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506597872] [2024-11-19 06:37:59,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:37:59,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 06:37:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:37:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 06:37:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2024-11-19 06:37:59,638 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:01,059 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2024-11-19 06:38:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 06:38:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-11-19 06:38:01,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:01,060 INFO L225 Difference]: With dead ends: 132 [2024-11-19 06:38:01,061 INFO L226 Difference]: Without dead ends: 132 [2024-11-19 06:38:01,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=320, Invalid=1750, Unknown=0, NotChecked=0, Total=2070 [2024-11-19 06:38:01,062 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 163 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:01,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 661 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-19 06:38:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-19 06:38:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2024-11-19 06:38:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.3902439024390243) internal successors, (114), 108 states have internal predecessors, (114), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 06:38:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2024-11-19 06:38:01,068 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 39 [2024-11-19 06:38:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:01,068 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2024-11-19 06:38:01,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2024-11-19 06:38:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 06:38:01,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:01,070 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:01,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:01,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:01,274 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:01,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:01,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616107, now seen corresponding path program 1 times [2024-11-19 06:38:01,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:01,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709351411] [2024-11-19 06:38:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709351411] [2024-11-19 06:38:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709351411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139350490] [2024-11-19 06:38:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:01,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:01,580 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) [2024-11-19 06:38:01,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 06:38:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:01,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 06:38:01,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:01,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:02,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 71 treesize of output 65 [2024-11-19 06:38:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139350490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:02,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-11-19 06:38:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167210560] [2024-11-19 06:38:02,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:02,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-19 06:38:02,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-19 06:38:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 06:38:02,636 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 35 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 32 states have internal predecessors, (57), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:03,392 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2024-11-19 06:38:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 06:38:03,392 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 32 states have internal predecessors, (57), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-11-19 06:38:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:03,394 INFO L225 Difference]: With dead ends: 169 [2024-11-19 06:38:03,394 INFO L226 Difference]: Without dead ends: 169 [2024-11-19 06:38:03,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 06:38:03,395 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 105 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:03,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 1154 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:38:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-19 06:38:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2024-11-19 06:38:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.4395604395604396) internal successors, (131), 117 states have internal predecessors, (131), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-19 06:38:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2024-11-19 06:38:03,400 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 41 [2024-11-19 06:38:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:03,401 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2024-11-19 06:38:03,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 32 states have internal predecessors, (57), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2024-11-19 06:38:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 06:38:03,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:03,402 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:03,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 06:38:03,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:03,606 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:03,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616108, now seen corresponding path program 1 times [2024-11-19 06:38:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:03,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371496182] [2024-11-19 06:38:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 06:38:03,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371496182] [2024-11-19 06:38:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371496182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:38:03,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:38:03,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:38:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100936902] [2024-11-19 06:38:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:38:03,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:38:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:38:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:38:03,674 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 06:38:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:03,774 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2024-11-19 06:38:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:38:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-19 06:38:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:03,776 INFO L225 Difference]: With dead ends: 135 [2024-11-19 06:38:03,776 INFO L226 Difference]: Without dead ends: 135 [2024-11-19 06:38:03,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:38:03,777 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 36 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:03,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 243 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:38:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-19 06:38:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-19 06:38:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 114 states have internal predecessors, (124), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-19 06:38:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2024-11-19 06:38:03,782 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 41 [2024-11-19 06:38:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:03,782 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2024-11-19 06:38:03,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 06:38:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2024-11-19 06:38:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 06:38:03,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:03,783 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:03,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 06:38:03,784 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:03,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1303491776, now seen corresponding path program 1 times [2024-11-19 06:38:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:03,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570423652] [2024-11-19 06:38:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570423652] [2024-11-19 06:38:04,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570423652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154588844] [2024-11-19 06:38:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:04,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:04,036 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) [2024-11-19 06:38:04,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 06:38:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:04,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 06:38:04,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:04,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:04,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2024-11-19 06:38:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154588844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:04,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:04,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-19 06:38:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60922265] [2024-11-19 06:38:04,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:04,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 06:38:04,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 06:38:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2024-11-19 06:38:04,615 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 32 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:05,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:05,002 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2024-11-19 06:38:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 06:38:05,002 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2024-11-19 06:38:05,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:05,003 INFO L225 Difference]: With dead ends: 146 [2024-11-19 06:38:05,003 INFO L226 Difference]: Without dead ends: 146 [2024-11-19 06:38:05,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 06:38:05,004 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 69 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:05,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 944 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:38:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-19 06:38:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2024-11-19 06:38:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 121 states have internal predecessors, (131), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-19 06:38:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2024-11-19 06:38:05,010 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 42 [2024-11-19 06:38:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:05,010 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2024-11-19 06:38:05,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2024-11-19 06:38:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 06:38:05,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:05,011 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:05,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 06:38:05,211 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,SelfDestructingSolverStorable12 [2024-11-19 06:38:05,212 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:05,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1473708635, now seen corresponding path program 1 times [2024-11-19 06:38:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:05,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099443103] [2024-11-19 06:38:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:05,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099443103] [2024-11-19 06:38:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099443103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083290257] [2024-11-19 06:38:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:05,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:05,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:05,323 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) [2024-11-19 06:38:05,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 06:38:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:05,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 06:38:05,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:05,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:05,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083290257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:05,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:05,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-11-19 06:38:05,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086727077] [2024-11-19 06:38:05,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:05,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 06:38:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 06:38:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-19 06:38:05,586 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 06:38:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:05,716 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2024-11-19 06:38:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:38:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-19 06:38:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:05,718 INFO L225 Difference]: With dead ends: 161 [2024-11-19 06:38:05,719 INFO L226 Difference]: Without dead ends: 161 [2024-11-19 06:38:05,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-11-19 06:38:05,719 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 22 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:05,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 783 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:38:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-19 06:38:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2024-11-19 06:38:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 106 states have (on average 1.3018867924528301) internal successors, (138), 129 states have internal predecessors, (138), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-19 06:38:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2024-11-19 06:38:05,726 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 44 [2024-11-19 06:38:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:05,726 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2024-11-19 06:38:05,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 06:38:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2024-11-19 06:38:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-19 06:38:05,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:05,727 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:05,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:05,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 06:38:05,928 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:05,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1001178212, now seen corresponding path program 3 times [2024-11-19 06:38:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:05,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987310328] [2024-11-19 06:38:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:38:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:05,949 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 06:38:05,949 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:38:06,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:06,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987310328] [2024-11-19 06:38:06,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987310328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:06,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538719802] [2024-11-19 06:38:06,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:38:06,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:06,164 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) [2024-11-19 06:38:06,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 06:38:06,238 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 06:38:06,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:06,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 06:38:06,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:06,289 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 8 treesize of output 1 [2024-11-19 06:38:06,293 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 [2024-11-19 06:38:06,371 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:38:06,372 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 [2024-11-19 06:38:06,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2024-11-19 06:38:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 06:38:10,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538719802] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:11,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:38:11,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2024-11-19 06:38:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271645337] [2024-11-19 06:38:11,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:11,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 06:38:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 06:38:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=583, Unknown=1, NotChecked=0, Total=702 [2024-11-19 06:38:11,255 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:12,122 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2024-11-19 06:38:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 06:38:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2024-11-19 06:38:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:12,125 INFO L225 Difference]: With dead ends: 153 [2024-11-19 06:38:12,125 INFO L226 Difference]: Without dead ends: 153 [2024-11-19 06:38:12,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=264, Invalid=1141, Unknown=1, NotChecked=0, Total=1406 [2024-11-19 06:38:12,128 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 164 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:12,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 430 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:38:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-19 06:38:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2024-11-19 06:38:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 127 states have internal predecessors, (136), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-19 06:38:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2024-11-19 06:38:12,137 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 43 [2024-11-19 06:38:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:12,137 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2024-11-19 06:38:12,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-19 06:38:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2024-11-19 06:38:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 06:38:12,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:12,140 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:12,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 06:38:12,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 06:38:12,341 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:12,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash 466893472, now seen corresponding path program 2 times [2024-11-19 06:38:12,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:12,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7769350] [2024-11-19 06:38:12,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:38:12,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:12,367 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:38:12,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:12,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:12,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7769350] [2024-11-19 06:38:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7769350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:12,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992184660] [2024-11-19 06:38:12,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:38:12,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:12,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:12,493 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:12,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 06:38:12,591 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:38:12,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:12,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 06:38:12,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:12,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:12,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992184660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:12,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:12,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 24 [2024-11-19 06:38:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774987168] [2024-11-19 06:38:12,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:12,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 06:38:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 06:38:12,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-11-19 06:38:12,984 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-19 06:38:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:13,291 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2024-11-19 06:38:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 06:38:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-19 06:38:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:13,292 INFO L225 Difference]: With dead ends: 169 [2024-11-19 06:38:13,292 INFO L226 Difference]: Without dead ends: 169 [2024-11-19 06:38:13,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2024-11-19 06:38:13,293 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 41 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:13,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1228 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:38:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-19 06:38:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2024-11-19 06:38:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 117 states have (on average 1.2735042735042734) internal successors, (149), 139 states have internal predecessors, (149), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-19 06:38:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 185 transitions. [2024-11-19 06:38:13,302 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 185 transitions. Word has length 49 [2024-11-19 06:38:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:13,302 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 185 transitions. [2024-11-19 06:38:13,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-19 06:38:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 185 transitions. [2024-11-19 06:38:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 06:38:13,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:13,304 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:13,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:13,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 06:38:13,504 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:13,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1510669477, now seen corresponding path program 1 times [2024-11-19 06:38:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812234977] [2024-11-19 06:38:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:13,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 06:38:13,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812234977] [2024-11-19 06:38:13,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812234977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:38:13,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:38:13,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:38:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187555897] [2024-11-19 06:38:13,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:38:13,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:38:13,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:38:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:38:13,570 INFO L87 Difference]: Start difference. First operand 164 states and 185 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 06:38:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:13,670 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2024-11-19 06:38:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:38:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-19 06:38:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:13,672 INFO L225 Difference]: With dead ends: 159 [2024-11-19 06:38:13,672 INFO L226 Difference]: Without dead ends: 159 [2024-11-19 06:38:13,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:38:13,673 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 47 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:13,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 220 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:38:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-19 06:38:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-11-19 06:38:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 134 states have internal predecessors, (144), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-19 06:38:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2024-11-19 06:38:13,679 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 50 [2024-11-19 06:38:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:13,679 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2024-11-19 06:38:13,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 06:38:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2024-11-19 06:38:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 06:38:13,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:13,680 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:13,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 06:38:13,680 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:13,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1510669478, now seen corresponding path program 1 times [2024-11-19 06:38:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433110629] [2024-11-19 06:38:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:13,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433110629] [2024-11-19 06:38:13,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433110629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:13,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377558559] [2024-11-19 06:38:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:13,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:13,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:13,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:13,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 06:38:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:14,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 06:38:14,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:14,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:14,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 7 [2024-11-19 06:38:14,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:38:14,452 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 21 treesize of output 25 [2024-11-19 06:38:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:14,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377558559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:14,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:14,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-19 06:38:14,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598675487] [2024-11-19 06:38:14,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:14,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-19 06:38:14,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:14,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-19 06:38:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 06:38:14,583 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 30 states have internal predecessors, (78), 13 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-19 06:38:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:15,271 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2024-11-19 06:38:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 06:38:15,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 30 states have internal predecessors, (78), 13 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2024-11-19 06:38:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:15,273 INFO L225 Difference]: With dead ends: 202 [2024-11-19 06:38:15,273 INFO L226 Difference]: Without dead ends: 202 [2024-11-19 06:38:15,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 06:38:15,274 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 117 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:15,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1258 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:38:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-19 06:38:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 185. [2024-11-19 06:38:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.223021582733813) internal successors, (170), 154 states have internal predecessors, (170), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-19 06:38:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2024-11-19 06:38:15,283 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 50 [2024-11-19 06:38:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:15,283 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2024-11-19 06:38:15,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 30 states have internal predecessors, (78), 13 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-19 06:38:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2024-11-19 06:38:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 06:38:15,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:15,284 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:15,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:15,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 06:38:15,485 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:15,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1687043981, now seen corresponding path program 1 times [2024-11-19 06:38:15,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087458635] [2024-11-19 06:38:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:15,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:15,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:15,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087458635] [2024-11-19 06:38:15,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087458635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:15,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272994455] [2024-11-19 06:38:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:15,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:15,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:15,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:15,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 06:38:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:15,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 06:38:15,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:16,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:16,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2024-11-19 06:38:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272994455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:16,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:16,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2024-11-19 06:38:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289460691] [2024-11-19 06:38:16,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:16,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-19 06:38:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-19 06:38:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2024-11-19 06:38:16,610 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 10 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 06:38:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:17,131 INFO L93 Difference]: Finished difference Result 244 states and 288 transitions. [2024-11-19 06:38:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 06:38:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 10 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-19 06:38:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:17,133 INFO L225 Difference]: With dead ends: 244 [2024-11-19 06:38:17,134 INFO L226 Difference]: Without dead ends: 244 [2024-11-19 06:38:17,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 06:38:17,135 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 157 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:17,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1055 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:38:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-19 06:38:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 198. [2024-11-19 06:38:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 164 states have internal predecessors, (179), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-19 06:38:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 227 transitions. [2024-11-19 06:38:17,143 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 227 transitions. Word has length 53 [2024-11-19 06:38:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:17,144 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 227 transitions. [2024-11-19 06:38:17,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 10 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 06:38:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 227 transitions. [2024-11-19 06:38:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 06:38:17,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:17,145 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:17,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 06:38:17,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:17,346 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:17,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1088870373, now seen corresponding path program 3 times [2024-11-19 06:38:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59332483] [2024-11-19 06:38:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:38:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:17,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 06:38:17,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-19 06:38:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:17,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59332483] [2024-11-19 06:38:17,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59332483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:17,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333218006] [2024-11-19 06:38:17,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:38:17,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:17,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:17,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:17,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 06:38:17,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 06:38:17,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:17,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 06:38:17,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 06:38:18,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:18,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 46 [2024-11-19 06:38:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 06:38:19,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333218006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:19,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:19,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 42 [2024-11-19 06:38:19,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225337178] [2024-11-19 06:38:19,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:19,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-19 06:38:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-19 06:38:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2024-11-19 06:38:19,218 INFO L87 Difference]: Start difference. First operand 198 states and 227 transitions. Second operand has 43 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 37 states have internal predecessors, (71), 15 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 06:38:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:20,116 INFO L93 Difference]: Finished difference Result 214 states and 246 transitions. [2024-11-19 06:38:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 06:38:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 37 states have internal predecessors, (71), 15 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 53 [2024-11-19 06:38:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:20,118 INFO L225 Difference]: With dead ends: 214 [2024-11-19 06:38:20,118 INFO L226 Difference]: Without dead ends: 214 [2024-11-19 06:38:20,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 06:38:20,119 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 78 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:20,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1272 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:38:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-19 06:38:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2024-11-19 06:38:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 158 states have (on average 1.1962025316455696) internal successors, (189), 172 states have internal predecessors, (189), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-19 06:38:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 241 transitions. [2024-11-19 06:38:20,125 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 241 transitions. Word has length 53 [2024-11-19 06:38:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:20,126 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 241 transitions. [2024-11-19 06:38:20,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 37 states have internal predecessors, (71), 15 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 06:38:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 241 transitions. [2024-11-19 06:38:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-19 06:38:20,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:20,131 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:20,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 06:38:20,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:20,332 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:20,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash -604756816, now seen corresponding path program 1 times [2024-11-19 06:38:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:20,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472203669] [2024-11-19 06:38:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 06:38:20,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:20,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472203669] [2024-11-19 06:38:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472203669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:38:20,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:38:20,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-19 06:38:20,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725976299] [2024-11-19 06:38:20,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:38:20,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 06:38:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:20,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 06:38:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-19 06:38:20,645 INFO L87 Difference]: Start difference. First operand 209 states and 241 transitions. Second operand has 13 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:38:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:20,921 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2024-11-19 06:38:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 06:38:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 54 [2024-11-19 06:38:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:20,923 INFO L225 Difference]: With dead ends: 209 [2024-11-19 06:38:20,923 INFO L226 Difference]: Without dead ends: 209 [2024-11-19 06:38:20,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-19 06:38:20,924 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 48 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:20,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 543 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:38:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-19 06:38:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2024-11-19 06:38:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 171 states have internal predecessors, (187), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-19 06:38:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 239 transitions. [2024-11-19 06:38:20,934 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 239 transitions. Word has length 54 [2024-11-19 06:38:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:20,935 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 239 transitions. [2024-11-19 06:38:20,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:38:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 239 transitions. [2024-11-19 06:38:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 06:38:20,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:20,936 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:20,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 06:38:20,936 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:20,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1351860277, now seen corresponding path program 4 times [2024-11-19 06:38:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716339996] [2024-11-19 06:38:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:38:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:20,952 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:38:20,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:21,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:21,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716339996] [2024-11-19 06:38:21,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716339996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:21,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057730054] [2024-11-19 06:38:21,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:38:21,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:21,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:21,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:21,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 06:38:21,206 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:38:21,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:21,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 06:38:21,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:21,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:21,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057730054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:21,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:21,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2024-11-19 06:38:21,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171818637] [2024-11-19 06:38:21,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:21,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-19 06:38:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-19 06:38:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-11-19 06:38:21,721 INFO L87 Difference]: Start difference. First operand 208 states and 239 transitions. Second operand has 31 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 8 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 06:38:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:22,168 INFO L93 Difference]: Finished difference Result 275 states and 315 transitions. [2024-11-19 06:38:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 06:38:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 8 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2024-11-19 06:38:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:22,172 INFO L225 Difference]: With dead ends: 275 [2024-11-19 06:38:22,172 INFO L226 Difference]: Without dead ends: 275 [2024-11-19 06:38:22,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 06:38:22,173 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 76 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:22,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1104 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:38:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-19 06:38:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 240. [2024-11-19 06:38:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 184 states have (on average 1.173913043478261) internal successors, (216), 198 states have internal predecessors, (216), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-19 06:38:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 274 transitions. [2024-11-19 06:38:22,184 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 274 transitions. Word has length 56 [2024-11-19 06:38:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:22,184 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 274 transitions. [2024-11-19 06:38:22,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 8 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 06:38:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 274 transitions. [2024-11-19 06:38:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 06:38:22,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:22,185 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:22,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:22,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:22,386 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:22,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -453742993, now seen corresponding path program 1 times [2024-11-19 06:38:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154429654] [2024-11-19 06:38:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154429654] [2024-11-19 06:38:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154429654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330478568] [2024-11-19 06:38:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:22,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:22,568 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 06:38:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:22,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 06:38:22,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:22,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:22,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330478568] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:22,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:22,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-11-19 06:38:22,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002010322] [2024-11-19 06:38:22,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:22,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 06:38:22,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 06:38:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-11-19 06:38:22,998 INFO L87 Difference]: Start difference. First operand 240 states and 274 transitions. Second operand has 29 states, 29 states have (on average 3.0) internal successors, (87), 26 states have internal predecessors, (87), 11 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-19 06:38:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:23,204 INFO L93 Difference]: Finished difference Result 254 states and 288 transitions. [2024-11-19 06:38:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:38:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 26 states have internal predecessors, (87), 11 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 60 [2024-11-19 06:38:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:23,207 INFO L225 Difference]: With dead ends: 254 [2024-11-19 06:38:23,207 INFO L226 Difference]: Without dead ends: 254 [2024-11-19 06:38:23,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2024-11-19 06:38:23,208 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 58 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:23,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1126 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:38:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-19 06:38:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2024-11-19 06:38:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 209 states have internal predecessors, (227), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-19 06:38:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 287 transitions. [2024-11-19 06:38:23,217 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 287 transitions. Word has length 60 [2024-11-19 06:38:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:23,217 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 287 transitions. [2024-11-19 06:38:23,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 26 states have internal predecessors, (87), 11 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-19 06:38:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 287 transitions. [2024-11-19 06:38:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 06:38:23,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:23,218 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:23,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:23,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 06:38:23,419 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:23,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -299274688, now seen corresponding path program 1 times [2024-11-19 06:38:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:23,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281928298] [2024-11-19 06:38:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:23,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:24,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:24,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281928298] [2024-11-19 06:38:24,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281928298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:24,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543031595] [2024-11-19 06:38:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:24,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:24,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:24,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:24,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 06:38:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:24,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-19 06:38:24,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:24,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:25,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 256 treesize of output 246 [2024-11-19 06:38:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:38:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543031595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:27,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:27,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 16] total 53 [2024-11-19 06:38:27,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866952458] [2024-11-19 06:38:27,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:27,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-19 06:38:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-19 06:38:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2589, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 06:38:27,016 INFO L87 Difference]: Start difference. First operand 253 states and 287 transitions. Second operand has 54 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 47 states have internal predecessors, (114), 15 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-19 06:38:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:31,517 INFO L93 Difference]: Finished difference Result 359 states and 400 transitions. [2024-11-19 06:38:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-19 06:38:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 47 states have internal predecessors, (114), 15 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 62 [2024-11-19 06:38:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:31,519 INFO L225 Difference]: With dead ends: 359 [2024-11-19 06:38:31,519 INFO L226 Difference]: Without dead ends: 347 [2024-11-19 06:38:31,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=975, Invalid=9531, Unknown=0, NotChecked=0, Total=10506 [2024-11-19 06:38:31,522 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 283 mSDsluCounter, 2864 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:31,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 2974 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-19 06:38:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-11-19 06:38:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 264. [2024-11-19 06:38:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 203 states have (on average 1.1477832512315271) internal successors, (233), 217 states have internal predecessors, (233), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 297 transitions. [2024-11-19 06:38:31,531 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 297 transitions. Word has length 62 [2024-11-19 06:38:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:31,532 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 297 transitions. [2024-11-19 06:38:31,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 47 states have internal predecessors, (114), 15 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-19 06:38:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 297 transitions. [2024-11-19 06:38:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 06:38:31,533 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:31,533 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:31,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:31,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:31,738 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:31,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2073437478, now seen corresponding path program 1 times [2024-11-19 06:38:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:31,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808042612] [2024-11-19 06:38:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 06:38:31,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:31,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808042612] [2024-11-19 06:38:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808042612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:38:31,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:38:31,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:38:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038485048] [2024-11-19 06:38:31,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:38:31,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:38:31,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:38:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:38:31,806 INFO L87 Difference]: Start difference. First operand 264 states and 297 transitions. Second operand has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 06:38:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:31,863 INFO L93 Difference]: Finished difference Result 263 states and 296 transitions. [2024-11-19 06:38:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:38:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2024-11-19 06:38:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:31,864 INFO L225 Difference]: With dead ends: 263 [2024-11-19 06:38:31,864 INFO L226 Difference]: Without dead ends: 263 [2024-11-19 06:38:31,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:38:31,865 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:31,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 183 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:38:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-19 06:38:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2024-11-19 06:38:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 216 states have internal predecessors, (232), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 296 transitions. [2024-11-19 06:38:31,873 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 296 transitions. Word has length 62 [2024-11-19 06:38:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:31,873 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 296 transitions. [2024-11-19 06:38:31,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 06:38:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 296 transitions. [2024-11-19 06:38:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 06:38:31,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:31,874 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:31,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-19 06:38:31,875 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:31,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2073437479, now seen corresponding path program 1 times [2024-11-19 06:38:31,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:31,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378312603] [2024-11-19 06:38:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:31,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:32,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378312603] [2024-11-19 06:38:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378312603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148925428] [2024-11-19 06:38:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:32,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:32,196 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:32,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 06:38:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:32,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 06:38:32,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:32,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:32,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 [2024-11-19 06:38:32,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:38:32,695 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 18 treesize of output 22 [2024-11-19 06:38:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:32,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148925428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:32,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:32,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-19 06:38:32,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949083416] [2024-11-19 06:38:32,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:32,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 06:38:32,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:32,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 06:38:32,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-19 06:38:32,833 INFO L87 Difference]: Start difference. First operand 263 states and 296 transitions. Second operand has 27 states, 26 states have (on average 3.923076923076923) internal successors, (102), 25 states have internal predecessors, (102), 9 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-19 06:38:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:33,422 INFO L93 Difference]: Finished difference Result 292 states and 334 transitions. [2024-11-19 06:38:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 06:38:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.923076923076923) internal successors, (102), 25 states have internal predecessors, (102), 9 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 62 [2024-11-19 06:38:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:33,424 INFO L225 Difference]: With dead ends: 292 [2024-11-19 06:38:33,424 INFO L226 Difference]: Without dead ends: 292 [2024-11-19 06:38:33,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 06:38:33,425 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:33,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 688 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:38:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-19 06:38:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 273. [2024-11-19 06:38:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 213 states have (on average 1.15962441314554) internal successors, (247), 226 states have internal predecessors, (247), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 311 transitions. [2024-11-19 06:38:33,444 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 311 transitions. Word has length 62 [2024-11-19 06:38:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:33,444 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 311 transitions. [2024-11-19 06:38:33,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.923076923076923) internal successors, (102), 25 states have internal predecessors, (102), 9 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-19 06:38:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 311 transitions. [2024-11-19 06:38:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-19 06:38:33,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:33,445 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:33,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-19 06:38:33,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:33,646 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:33,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash -291441920, now seen corresponding path program 1 times [2024-11-19 06:38:33,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:33,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760245258] [2024-11-19 06:38:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 06:38:33,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760245258] [2024-11-19 06:38:33,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760245258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884740420] [2024-11-19 06:38:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:33,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:33,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:33,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:33,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 06:38:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:33,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 06:38:33,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:33,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:33,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884740420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:33,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:33,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 06:38:33,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623033865] [2024-11-19 06:38:33,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:33,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 06:38:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:33,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 06:38:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-19 06:38:33,986 INFO L87 Difference]: Start difference. First operand 273 states and 311 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-19 06:38:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:34,068 INFO L93 Difference]: Finished difference Result 276 states and 310 transitions. [2024-11-19 06:38:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 06:38:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2024-11-19 06:38:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:34,070 INFO L225 Difference]: With dead ends: 276 [2024-11-19 06:38:34,070 INFO L226 Difference]: Without dead ends: 276 [2024-11-19 06:38:34,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 06:38:34,071 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 33 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:34,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 383 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:38:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-19 06:38:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2024-11-19 06:38:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 213 states have (on average 1.1502347417840375) internal successors, (245), 226 states have internal predecessors, (245), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 309 transitions. [2024-11-19 06:38:34,081 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 309 transitions. Word has length 64 [2024-11-19 06:38:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:34,081 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 309 transitions. [2024-11-19 06:38:34,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-19 06:38:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 309 transitions. [2024-11-19 06:38:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-19 06:38:34,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:34,082 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:34,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-19 06:38:34,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:34,283 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:34,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -443655501, now seen corresponding path program 1 times [2024-11-19 06:38:34,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:34,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622907224] [2024-11-19 06:38:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 06:38:35,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622907224] [2024-11-19 06:38:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622907224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795268187] [2024-11-19 06:38:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:35,844 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:35,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 06:38:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:35,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-19 06:38:35,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:36,226 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 [2024-11-19 06:38:36,385 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 23 treesize of output 19 [2024-11-19 06:38:36,419 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 9 treesize of output 3 [2024-11-19 06:38:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 06:38:36,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:36,685 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 23 treesize of output 21 [2024-11-19 06:38:36,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 25 [2024-11-19 06:38:36,810 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 36 treesize of output 32 [2024-11-19 06:38:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:37,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795268187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:37,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:37,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 17] total 51 [2024-11-19 06:38:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391853529] [2024-11-19 06:38:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:37,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-19 06:38:37,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-19 06:38:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2024-11-19 06:38:37,414 INFO L87 Difference]: Start difference. First operand 273 states and 309 transitions. Second operand has 51 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 45 states have internal predecessors, (119), 9 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-11-19 06:38:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:39,479 INFO L93 Difference]: Finished difference Result 332 states and 382 transitions. [2024-11-19 06:38:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-19 06:38:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 45 states have internal predecessors, (119), 9 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 65 [2024-11-19 06:38:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:39,486 INFO L225 Difference]: With dead ends: 332 [2024-11-19 06:38:39,486 INFO L226 Difference]: Without dead ends: 332 [2024-11-19 06:38:39,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=455, Invalid=5397, Unknown=0, NotChecked=0, Total=5852 [2024-11-19 06:38:39,488 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 115 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:39,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1262 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-19 06:38:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-11-19 06:38:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 278. [2024-11-19 06:38:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 218 states have (on average 1.146788990825688) internal successors, (250), 230 states have internal predecessors, (250), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 314 transitions. [2024-11-19 06:38:39,499 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 314 transitions. Word has length 65 [2024-11-19 06:38:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:39,500 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 314 transitions. [2024-11-19 06:38:39,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 45 states have internal predecessors, (119), 9 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-11-19 06:38:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 314 transitions. [2024-11-19 06:38:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 06:38:39,501 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:39,501 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:39,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-19 06:38:39,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 06:38:39,702 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:39,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash -868412528, now seen corresponding path program 1 times [2024-11-19 06:38:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:39,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518970213] [2024-11-19 06:38:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 06:38:39,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518970213] [2024-11-19 06:38:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518970213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:38:39,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:38:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:38:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570925086] [2024-11-19 06:38:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:38:39,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:38:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:38:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:38:39,796 INFO L87 Difference]: Start difference. First operand 278 states and 314 transitions. Second operand has 5 states, 4 states have (on average 11.25) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 06:38:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:39,867 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2024-11-19 06:38:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:38:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.25) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-19 06:38:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:39,869 INFO L225 Difference]: With dead ends: 277 [2024-11-19 06:38:39,869 INFO L226 Difference]: Without dead ends: 277 [2024-11-19 06:38:39,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:38:39,870 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 25 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:39,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 235 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:38:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-19 06:38:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2024-11-19 06:38:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 229 states have internal predecessors, (248), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 312 transitions. [2024-11-19 06:38:39,880 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 312 transitions. Word has length 66 [2024-11-19 06:38:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:39,881 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 312 transitions. [2024-11-19 06:38:39,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.25) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 06:38:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 312 transitions. [2024-11-19 06:38:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 06:38:39,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:39,882 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:39,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-19 06:38:39,882 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:39,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash -868412527, now seen corresponding path program 1 times [2024-11-19 06:38:39,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:39,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744587922] [2024-11-19 06:38:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:39,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:40,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:40,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744587922] [2024-11-19 06:38:40,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744587922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:40,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787387644] [2024-11-19 06:38:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:38:40,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:40,112 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:40,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 06:38:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:38:40,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 06:38:40,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:40,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:40,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2024-11-19 06:38:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787387644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:40,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2024-11-19 06:38:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86562588] [2024-11-19 06:38:40,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:40,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 06:38:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 06:38:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-19 06:38:40,578 INFO L87 Difference]: Start difference. First operand 277 states and 312 transitions. Second operand has 16 states, 15 states have (on average 6.733333333333333) internal successors, (101), 16 states have internal predecessors, (101), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-19 06:38:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:40,811 INFO L93 Difference]: Finished difference Result 284 states and 317 transitions. [2024-11-19 06:38:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:38:40,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.733333333333333) internal successors, (101), 16 states have internal predecessors, (101), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 66 [2024-11-19 06:38:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:40,813 INFO L225 Difference]: With dead ends: 284 [2024-11-19 06:38:40,814 INFO L226 Difference]: Without dead ends: 284 [2024-11-19 06:38:40,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-19 06:38:40,814 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 153 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:40,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 358 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:38:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-19 06:38:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2024-11-19 06:38:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 222 states have (on average 1.1306306306306306) internal successors, (251), 232 states have internal predecessors, (251), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 315 transitions. [2024-11-19 06:38:40,824 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 315 transitions. Word has length 66 [2024-11-19 06:38:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:40,824 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 315 transitions. [2024-11-19 06:38:40,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.733333333333333) internal successors, (101), 16 states have internal predecessors, (101), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-19 06:38:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 315 transitions. [2024-11-19 06:38:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-19 06:38:40,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:40,825 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:40,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 06:38:41,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:41,030 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:41,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1587838820, now seen corresponding path program 5 times [2024-11-19 06:38:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:41,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986592706] [2024-11-19 06:38:41,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 06:38:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:41,086 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-19 06:38:41,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:38:41,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986592706] [2024-11-19 06:38:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986592706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384055179] [2024-11-19 06:38:41,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 06:38:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:41,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:41,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 06:38:41,671 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-19 06:38:41,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:41,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 06:38:41,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:38:41,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:38:42,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384055179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:42,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:42,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 40 [2024-11-19 06:38:42,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657861766] [2024-11-19 06:38:42,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:42,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-19 06:38:42,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-19 06:38:42,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 06:38:42,681 INFO L87 Difference]: Start difference. First operand 280 states and 315 transitions. Second operand has 40 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-19 06:38:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:38:43,772 INFO L93 Difference]: Finished difference Result 314 states and 355 transitions. [2024-11-19 06:38:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-19 06:38:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2024-11-19 06:38:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:38:43,774 INFO L225 Difference]: With dead ends: 314 [2024-11-19 06:38:43,774 INFO L226 Difference]: Without dead ends: 314 [2024-11-19 06:38:43,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=558, Invalid=3102, Unknown=0, NotChecked=0, Total=3660 [2024-11-19 06:38:43,776 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 128 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 06:38:43,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1585 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 06:38:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-19 06:38:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 308. [2024-11-19 06:38:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 250 states have (on average 1.128) internal successors, (282), 260 states have internal predecessors, (282), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-19 06:38:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 346 transitions. [2024-11-19 06:38:43,787 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 346 transitions. Word has length 68 [2024-11-19 06:38:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:38:43,787 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 346 transitions. [2024-11-19 06:38:43,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-19 06:38:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 346 transitions. [2024-11-19 06:38:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-19 06:38:43,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:38:43,788 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:38:43,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-19 06:38:43,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:43,990 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-19 06:38:43,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:38:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash 505449271, now seen corresponding path program 6 times [2024-11-19 06:38:43,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:38:43,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206030354] [2024-11-19 06:38:43,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 06:38:43,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:38:44,031 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 06:38:44,031 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 50 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 06:38:45,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:38:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206030354] [2024-11-19 06:38:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206030354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:38:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866429633] [2024-11-19 06:38:45,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 06:38:45,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:38:45,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:38:45,120 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:38:45,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 06:38:45,257 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 06:38:45,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:38:45,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-19 06:38:45,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:38:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 19 proven. 79 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-19 06:38:48,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:38:50,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 213 treesize of output 207 [2024-11-19 06:38:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-19 06:38:52,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866429633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:38:52,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:38:52,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 22] total 69 [2024-11-19 06:38:52,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867093735] [2024-11-19 06:38:52,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:38:52,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-19 06:38:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:38:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-19 06:38:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=4288, Unknown=0, NotChecked=0, Total=4830 [2024-11-19 06:38:52,198 INFO L87 Difference]: Start difference. First operand 308 states and 346 transitions. Second operand has 70 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 60 states have internal predecessors, (115), 19 states have call successors, (19), 10 states have call predecessors, (19), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11)