./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0237.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0237.i -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 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:41:42,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:41:42,471 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 10:41:42,476 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:41:42,477 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:41:42,503 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:41:42,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:41:42,504 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:41:42,505 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:41:42,506 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:41:42,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:41:42,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:41:42,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:41:42,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:41:42,509 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:41:42,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:41:42,510 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 10:41:42,510 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:41:42,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 10:41:42,511 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:41:42,511 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:41:42,514 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:41:42,514 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:41:42,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:41:42,515 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:41:42,515 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:41:42,515 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:41:42,515 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 10:41:42,516 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:41:42,516 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:41:42,516 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:41:42,516 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:41:42,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:41:42,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:41:42,517 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:41:42,517 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:41:42,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:41:42,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:41:42,517 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:41:42,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:41:42,518 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:41:42,519 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:41:42,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea [2024-10-13 10:41:42,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:41:42,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:41:42,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:41:42,814 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:41:42,815 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:41:42,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0237.i [2024-10-13 10:41:44,223 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:41:44,504 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:41:44,505 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0237.i [2024-10-13 10:41:44,522 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75613cacc/04cc3ce0bbca4985a58cad8a50820b1c/FLAGa1fd5dc7f [2024-10-13 10:41:44,812 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75613cacc/04cc3ce0bbca4985a58cad8a50820b1c [2024-10-13 10:41:44,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:41:44,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:41:44,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:41:44,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:41:44,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:41:44,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:41:44" (1/1) ... [2024-10-13 10:41:44,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5e6c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:44, skipping insertion in model container [2024-10-13 10:41:44,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:41:44" (1/1) ... [2024-10-13 10:41:44,872 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:41:45,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:41:45,255 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:41:45,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:41:45,339 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:41:45,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45 WrapperNode [2024-10-13 10:41:45,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:41:45,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:41:45,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:41:45,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:41:45,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,401 INFO L138 Inliner]: procedures = 188, calls = 66, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 222 [2024-10-13 10:41:45,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:41:45,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:41:45,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:41:45,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:41:45,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,425 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,465 INFO L175 MemorySlicer]: Split 38 memory accesses to 3 slices as follows [2, 4, 32]. 84 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 18 writes are split as follows [0, 1, 17]. [2024-10-13 10:41:45,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:41:45,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:41:45,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:41:45,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:41:45,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (1/1) ... [2024-10-13 10:41:45,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:41:45,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:45,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 10:41:45,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 10:41:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 10:41:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-13 10:41:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2024-10-13 10:41:45,580 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2024-10-13 10:41:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 10:41:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-13 10:41:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-13 10:41:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-13 10:41:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 10:41:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 10:41:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 10:41:45,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:41:45,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:41:45,757 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:41:45,759 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:41:46,342 INFO L? ?]: Removed 225 outVars from TransFormulas that were not future-live. [2024-10-13 10:41:46,342 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:41:46,458 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:41:46,458 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-13 10:41:46,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:41:46 BoogieIcfgContainer [2024-10-13 10:41:46,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:41:46,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:41:46,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:41:46,466 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:41:46,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:41:44" (1/3) ... [2024-10-13 10:41:46,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f81905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:41:46, skipping insertion in model container [2024-10-13 10:41:46,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:41:45" (2/3) ... [2024-10-13 10:41:46,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f81905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:41:46, skipping insertion in model container [2024-10-13 10:41:46,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:41:46" (3/3) ... [2024-10-13 10:41:46,469 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0237.i [2024-10-13 10:41:46,483 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:41:46,483 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2024-10-13 10:41:46,523 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:41:46,529 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;@4f79084f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:41:46,529 INFO L334 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2024-10-13 10:41:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 171 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-13 10:41:46,537 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:46,538 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-13 10:41:46,538 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:46,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash 393206, now seen corresponding path program 1 times [2024-10-13 10:41:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:46,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128082672] [2024-10-13 10:41:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:41:46,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:46,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128082672] [2024-10-13 10:41:46,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128082672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:41:46,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:41:46,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:41:46,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270017545] [2024-10-13 10:41:46,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:41:46,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 10:41:46,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 10:41:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 10:41:46,705 INFO L87 Difference]: Start difference. First operand has 179 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 171 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:41:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:46,795 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2024-10-13 10:41:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 10:41:46,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-13 10:41:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:46,807 INFO L225 Difference]: With dead ends: 179 [2024-10-13 10:41:46,808 INFO L226 Difference]: Without dead ends: 178 [2024-10-13 10:41:46,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 10:41:46,814 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:46,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:41:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-10-13 10:41:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-10-13 10:41:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2024-10-13 10:41:46,854 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 3 [2024-10-13 10:41:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:46,854 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2024-10-13 10:41:46,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:41:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2024-10-13 10:41:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-13 10:41:46,855 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:46,855 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 10:41:46,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:41:46,855 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:46,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash 373275465, now seen corresponding path program 1 times [2024-10-13 10:41:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517273756] [2024-10-13 10:41:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:41:46,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:46,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517273756] [2024-10-13 10:41:46,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517273756] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:41:46,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:41:46,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:41:46,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115183559] [2024-10-13 10:41:46,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:41:46,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:41:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:41:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:41:46,998 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:41:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:47,170 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2024-10-13 10:41:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:41:47,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-13 10:41:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:47,172 INFO L225 Difference]: With dead ends: 177 [2024-10-13 10:41:47,172 INFO L226 Difference]: Without dead ends: 177 [2024-10-13 10:41:47,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:41:47,174 INFO L432 NwaCegarLoop]: 164 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:47,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 270 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:41:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-13 10:41:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2024-10-13 10:41:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 84 states have (on average 2.142857142857143) internal successors, (180), 169 states have internal predecessors, (180), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 192 transitions. [2024-10-13 10:41:47,189 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 192 transitions. Word has length 5 [2024-10-13 10:41:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:47,190 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 192 transitions. [2024-10-13 10:41:47,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:41:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 192 transitions. [2024-10-13 10:41:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:41:47,193 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:47,194 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:41:47,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 10:41:47,194 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:47,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1313362439, now seen corresponding path program 1 times [2024-10-13 10:41:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:47,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269375251] [2024-10-13 10:41:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:47,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:47,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807980783] [2024-10-13 10:41:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:47,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:47,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:47,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:47,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 10:41:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:47,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 10:41:47,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:47,463 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 [2024-10-13 10:41:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:41:47,483 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:41:47,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:47,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269375251] [2024-10-13 10:41:47,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:41:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807980783] [2024-10-13 10:41:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807980783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:41:47,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:41:47,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:41:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645641126] [2024-10-13 10:41:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:41:47,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:41:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:41:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:41:47,487 INFO L87 Difference]: Start difference. First operand 177 states and 192 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:41:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:47,702 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2024-10-13 10:41:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:41:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:41:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:47,704 INFO L225 Difference]: With dead ends: 184 [2024-10-13 10:41:47,706 INFO L226 Difference]: Without dead ends: 184 [2024-10-13 10:41:47,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:41:47,707 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 9 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:47,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 441 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:41:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-13 10:41:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-10-13 10:41:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 90 states have (on average 2.077777777777778) internal successors, (187), 175 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2024-10-13 10:41:47,723 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 6 [2024-10-13 10:41:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:47,726 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2024-10-13 10:41:47,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:41:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2024-10-13 10:41:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 10:41:47,727 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:47,727 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:47,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 10:41:47,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:47,932 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:47,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1870860128, now seen corresponding path program 1 times [2024-10-13 10:41:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033112560] [2024-10-13 10:41:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:47,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772641537] [2024-10-13 10:41:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:47,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:47,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:47,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:47,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 10:41:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:48,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 10:41:48,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:48,096 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 [2024-10-13 10:41:48,144 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 13 treesize of output 9 [2024-10-13 10:41:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:41:48,209 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:41:48,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:48,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033112560] [2024-10-13 10:41:48,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:41:48,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772641537] [2024-10-13 10:41:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772641537] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:41:48,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:41:48,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:41:48,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136834904] [2024-10-13 10:41:48,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:41:48,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:41:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:41:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:41:48,211 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 10:41:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:48,427 INFO L93 Difference]: Finished difference Result 192 states and 207 transitions. [2024-10-13 10:41:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:41:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-13 10:41:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:48,429 INFO L225 Difference]: With dead ends: 192 [2024-10-13 10:41:48,429 INFO L226 Difference]: Without dead ends: 186 [2024-10-13 10:41:48,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:41:48,431 INFO L432 NwaCegarLoop]: 164 mSDtfsCounter, 3 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:48,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 591 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:41:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-10-13 10:41:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2024-10-13 10:41:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 177 states have internal predecessors, (189), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2024-10-13 10:41:48,442 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 16 [2024-10-13 10:41:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:48,442 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2024-10-13 10:41:48,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 10:41:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2024-10-13 10:41:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 10:41:48,443 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:48,443 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:48,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 10:41:48,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 10:41:48,646 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:48,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1605654964, now seen corresponding path program 1 times [2024-10-13 10:41:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:48,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658266628] [2024-10-13 10:41:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641243045] [2024-10-13 10:41:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:48,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:48,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:48,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 10:41:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:48,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 10:41:48,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:48,859 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 [2024-10-13 10:41:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:41:48,876 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:41:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658266628] [2024-10-13 10:41:48,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:41:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641243045] [2024-10-13 10:41:48,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641243045] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:41:48,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:41:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:41:48,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524235498] [2024-10-13 10:41:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:41:48,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:41:48,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:41:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:41:48,882 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 10:41:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:49,037 INFO L93 Difference]: Finished difference Result 194 states and 209 transitions. [2024-10-13 10:41:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:41:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-13 10:41:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:49,038 INFO L225 Difference]: With dead ends: 194 [2024-10-13 10:41:49,038 INFO L226 Difference]: Without dead ends: 194 [2024-10-13 10:41:49,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:41:49,039 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 9 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:49,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 440 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:41:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-10-13 10:41:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-10-13 10:41:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 184 states have internal predecessors, (197), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 209 transitions. [2024-10-13 10:41:49,051 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 209 transitions. Word has length 17 [2024-10-13 10:41:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:49,052 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 209 transitions. [2024-10-13 10:41:49,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 10:41:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 209 transitions. [2024-10-13 10:41:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 10:41:49,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:49,054 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:49,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 10:41:49,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:49,259 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:49,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1413279444, now seen corresponding path program 1 times [2024-10-13 10:41:49,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:49,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266848781] [2024-10-13 10:41:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:49,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466763779] [2024-10-13 10:41:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:49,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:49,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 10:41:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:49,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-13 10:41:49,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:49,773 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 [2024-10-13 10:41:49,814 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 13 treesize of output 9 [2024-10-13 10:41:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-13 10:41:49,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:41:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-10-13 10:41:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266848781] [2024-10-13 10:41:50,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:41:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466763779] [2024-10-13 10:41:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466763779] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:41:50,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:41:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-10-13 10:41:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995946152] [2024-10-13 10:41:50,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:41:50,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 10:41:50,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 10:41:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-13 10:41:50,145 INFO L87 Difference]: Start difference. First operand 194 states and 209 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 10:41:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:50,594 INFO L93 Difference]: Finished difference Result 211 states and 227 transitions. [2024-10-13 10:41:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 10:41:50,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 60 [2024-10-13 10:41:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:50,597 INFO L225 Difference]: With dead ends: 211 [2024-10-13 10:41:50,597 INFO L226 Difference]: Without dead ends: 199 [2024-10-13 10:41:50,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2024-10-13 10:41:50,600 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 22 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:50,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 860 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:41:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-10-13 10:41:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2024-10-13 10:41:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 104 states have (on average 1.9423076923076923) internal successors, (202), 189 states have internal predecessors, (202), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 214 transitions. [2024-10-13 10:41:50,614 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 214 transitions. Word has length 60 [2024-10-13 10:41:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:50,617 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 214 transitions. [2024-10-13 10:41:50,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-13 10:41:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 214 transitions. [2024-10-13 10:41:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-13 10:41:50,619 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:50,620 INFO L215 NwaCegarLoop]: trace histogram [18, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:50,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 10:41:50,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:50,821 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:50,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2062793804, now seen corresponding path program 2 times [2024-10-13 10:41:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:50,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579623006] [2024-10-13 10:41:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:51,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769518162] [2024-10-13 10:41:51,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:41:51,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:51,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:51,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 10:41:51,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:41:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:41:51,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-13 10:41:51,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:51,562 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 [2024-10-13 10:41:51,599 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 13 treesize of output 9 [2024-10-13 10:41:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-13 10:41:51,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:41:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 35 proven. 100 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-10-13 10:41:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579623006] [2024-10-13 10:41:52,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:41:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769518162] [2024-10-13 10:41:52,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769518162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:41:52,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:41:52,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2024-10-13 10:41:52,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454886226] [2024-10-13 10:41:52,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:41:52,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 10:41:52,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:52,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 10:41:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:41:52,117 INFO L87 Difference]: Start difference. First operand 199 states and 214 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-13 10:41:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:53,366 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2024-10-13 10:41:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 10:41:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2024-10-13 10:41:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:53,368 INFO L225 Difference]: With dead ends: 223 [2024-10-13 10:41:53,368 INFO L226 Difference]: Without dead ends: 211 [2024-10-13 10:41:53,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 10:41:53,369 INFO L432 NwaCegarLoop]: 157 mSDtfsCounter, 130 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:53,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1737 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 10:41:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-13 10:41:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-10-13 10:41:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 116 states have (on average 1.8448275862068966) internal successors, (214), 201 states have internal predecessors, (214), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2024-10-13 10:41:53,381 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 73 [2024-10-13 10:41:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:53,381 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2024-10-13 10:41:53,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-13 10:41:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2024-10-13 10:41:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-13 10:41:53,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:53,387 INFO L215 NwaCegarLoop]: trace histogram [45, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:53,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 10:41:53,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:53,590 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:53,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:53,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2085592440, now seen corresponding path program 3 times [2024-10-13 10:41:53,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:53,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541740139] [2024-10-13 10:41:53,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:53,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068900771] [2024-10-13 10:41:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:41:53,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:53,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:53,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 10:41:54,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 10:41:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:41:54,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 10:41:54,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:54,168 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 [2024-10-13 10:41:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2024-10-13 10:41:54,184 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:41:54,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541740139] [2024-10-13 10:41:54,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:41:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068900771] [2024-10-13 10:41:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068900771] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:41:54,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:41:54,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:41:54,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877961116] [2024-10-13 10:41:54,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:41:54,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:41:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:41:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:41:54,187 INFO L87 Difference]: Start difference. First operand 211 states and 226 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-13 10:41:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:54,320 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2024-10-13 10:41:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:41:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 100 [2024-10-13 10:41:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:54,322 INFO L225 Difference]: With dead ends: 210 [2024-10-13 10:41:54,322 INFO L226 Difference]: Without dead ends: 210 [2024-10-13 10:41:54,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:41:54,325 INFO L432 NwaCegarLoop]: 168 mSDtfsCounter, 9 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:54,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 447 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:41:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-10-13 10:41:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2024-10-13 10:41:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 116 states have (on average 1.8362068965517242) internal successors, (213), 200 states have internal predecessors, (213), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2024-10-13 10:41:54,334 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 100 [2024-10-13 10:41:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:54,335 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2024-10-13 10:41:54,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-13 10:41:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2024-10-13 10:41:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-13 10:41:54,337 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:54,337 INFO L215 NwaCegarLoop]: trace histogram [50, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:54,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 10:41:54,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:54,542 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:54,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1832320948, now seen corresponding path program 1 times [2024-10-13 10:41:54,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:54,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642752837] [2024-10-13 10:41:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:55,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-13 10:41:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:55,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 10:41:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:55,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 10:41:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:55,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-13 10:41:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:55,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-13 10:41:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:55,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-13 10:41:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1630 backedges. 703 proven. 71 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2024-10-13 10:41:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:41:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642752837] [2024-10-13 10:41:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642752837] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:41:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053361001] [2024-10-13 10:41:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:56,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:56,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:56,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:56,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 10:41:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:56,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-13 10:41:56,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:56,527 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2024-10-13 10:41:56,574 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 10:41:56,575 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 12 treesize of output 14 [2024-10-13 10:41:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1630 backedges. 708 proven. 1 refuted. 0 times theorem prover too weak. 851 trivial. 70 not checked. [2024-10-13 10:41:56,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:41:56,819 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 10:41:56,820 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 12 treesize of output 11 [2024-10-13 10:41:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1630 backedges. 708 proven. 71 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2024-10-13 10:41:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053361001] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:41:56,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:41:56,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2024-10-13 10:41:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388954850] [2024-10-13 10:41:56,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:41:56,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 10:41:56,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:41:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 10:41:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-10-13 10:41:56,849 INFO L87 Difference]: Start difference. First operand 210 states and 225 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 10:41:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:41:57,411 INFO L93 Difference]: Finished difference Result 206 states and 221 transitions. [2024-10-13 10:41:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:41:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2024-10-13 10:41:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:41:57,415 INFO L225 Difference]: With dead ends: 206 [2024-10-13 10:41:57,415 INFO L226 Difference]: Without dead ends: 206 [2024-10-13 10:41:57,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 220 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=274, Unknown=1, NotChecked=34, Total=380 [2024-10-13 10:41:57,416 INFO L432 NwaCegarLoop]: 146 mSDtfsCounter, 15 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:41:57,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1021 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 812 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2024-10-13 10:41:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-13 10:41:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-10-13 10:41:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 116 states have (on average 1.8017241379310345) internal successors, (209), 196 states have internal predecessors, (209), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 10:41:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2024-10-13 10:41:57,421 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 110 [2024-10-13 10:41:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:41:57,422 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2024-10-13 10:41:57,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 10:41:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2024-10-13 10:41:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-13 10:41:57,423 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:41:57,423 INFO L215 NwaCegarLoop]: trace histogram [50, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:41:57,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 10:41:57,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:57,625 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-13 10:41:57,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:41:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1832320947, now seen corresponding path program 1 times [2024-10-13 10:41:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:41:57,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920301940] [2024-10-13 10:41:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:57,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:41:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 10:41:57,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970792075] [2024-10-13 10:41:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:41:57,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:41:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:41:57,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:41:57,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 10:41:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:41:59,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-13 10:41:59,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:41:59,546 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 [2024-10-13 10:41:59,586 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 13 treesize of output 9 [2024-10-13 10:41:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1630 backedges. 995 proven. 210 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-10-13 10:41:59,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:42:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1630 backedges. 197 proven. 378 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2024-10-13 10:42:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:42:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920301940] [2024-10-13 10:42:00,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 10:42:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970792075] [2024-10-13 10:42:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970792075] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:42:00,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:42:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2024-10-13 10:42:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809398973] [2024-10-13 10:42:00,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:42:00,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 10:42:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:42:00,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 10:42:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 10:42:00,830 INFO L87 Difference]: Start difference. First operand 206 states and 221 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-13 10:42:13,780 WARN L286 SmtUtils]: Spent 11.21s on a formula simplification. DAG size of input: 86 DAG size of output: 86 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)