./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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/array-examples/sanfoundry_24-2.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 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:03:45,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:03:45,601 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:03:45,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:03:45,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:03:45,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:03:45,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:03:45,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:03:45,641 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:03:45,642 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:03:45,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:03:45,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:03:45,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:03:45,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:03:45,646 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:03:45,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:03:45,646 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:03:45,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:03:45,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:03:45,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:03:45,648 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:03:45,651 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:03:45,651 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:03:45,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:03:45,652 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:03:45,652 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:03:45,652 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:03:45,653 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:03:45,653 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:03:45,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:03:45,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:03:45,654 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:03:45,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:03:45,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:03:45,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:03:45,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:03:45,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:03:45,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:03:45,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:03:45,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:03:45,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:03:45,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:03:45,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2024-10-24 16:03:45,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:03:45,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:03:45,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:03:45,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:03:45,943 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:03:45,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2024-10-24 16:03:47,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:03:47,638 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:03:47,640 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2024-10-24 16:03:47,650 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04dfb7d5f/a37f566e34d14c6582d37a077c020121/FLAG7df68dbe8 [2024-10-24 16:03:47,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04dfb7d5f/a37f566e34d14c6582d37a077c020121 [2024-10-24 16:03:47,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:03:47,672 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:03:47,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:03:47,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:03:47,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:03:47,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e44a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47, skipping insertion in model container [2024-10-24 16:03:47,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:03:47,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:03:47,929 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:03:47,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:03:47,970 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:03:47,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47 WrapperNode [2024-10-24 16:03:47,971 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:03:47,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:03:47,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:03:47,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:03:47,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,017 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-10-24 16:03:48,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:03:48,020 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:03:48,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:03:48,020 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:03:48,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,034 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,049 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-24 16:03:48,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:03:48,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:03:48,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:03:48,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:03:48,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:48,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:03:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:48,112 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) [2024-10-24 16:03:48,114 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 [2024-10-24 16:03:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 16:03:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 16:03:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 16:03:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 16:03:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:03:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 16:03:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:03:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:03:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 16:03:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 16:03:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 16:03:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 16:03:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:03:48,242 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:03:48,245 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:03:48,488 INFO L? ?]: Removed 35 outVars from TransFormulas that were not future-live. [2024-10-24 16:03:48,488 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:03:48,540 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:03:48,540 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 16:03:48,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:03:48 BoogieIcfgContainer [2024-10-24 16:03:48,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:03:48,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:03:48,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:03:48,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:03:48,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:03:47" (1/3) ... [2024-10-24 16:03:48,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a424cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:03:48, skipping insertion in model container [2024-10-24 16:03:48,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (2/3) ... [2024-10-24 16:03:48,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a424cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:03:48, skipping insertion in model container [2024-10-24 16:03:48,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:03:48" (3/3) ... [2024-10-24 16:03:48,550 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2024-10-24 16:03:48,568 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:03:48,568 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-24 16:03:48,625 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:03:48,632 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;@51e6aaa9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:03:48,632 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-10-24 16:03:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.88) internal successors, (47), 37 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-24 16:03:48,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:48,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-24 16:03:48,646 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:48,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash 133901, now seen corresponding path program 1 times [2024-10-24 16:03:48,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:48,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780842456] [2024-10-24 16:03:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:48,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:48,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780842456] [2024-10-24 16:03:48,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780842456] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:48,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:48,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:03:48,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292202765] [2024-10-24 16:03:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:48,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:03:48,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:03:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:48,922 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.88) internal successors, (47), 37 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 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) [2024-10-24 16:03:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:49,008 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-10-24 16:03:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:03:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2024-10-24 16:03:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:49,018 INFO L225 Difference]: With dead ends: 35 [2024-10-24 16:03:49,019 INFO L226 Difference]: Without dead ends: 34 [2024-10-24 16:03:49,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:49,027 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:49,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-24 16:03:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-24 16:03:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 30 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-10-24 16:03:49,068 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 3 [2024-10-24 16:03:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:49,069 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-10-24 16:03:49,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2024-10-24 16:03:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-10-24 16:03:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-24 16:03:49,070 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:49,070 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-24 16:03:49,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:03:49,070 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:49,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:49,071 INFO L85 PathProgramCache]: Analyzing trace with hash 133902, now seen corresponding path program 1 times [2024-10-24 16:03:49,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:49,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623142044] [2024-10-24 16:03:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:49,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623142044] [2024-10-24 16:03:49,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623142044] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:49,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:49,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:03:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852166062] [2024-10-24 16:03:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:49,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:03:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:03:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:49,221 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 3 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) [2024-10-24 16:03:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:49,293 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-10-24 16:03:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:03:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2024-10-24 16:03:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:49,297 INFO L225 Difference]: With dead ends: 36 [2024-10-24 16:03:49,297 INFO L226 Difference]: Without dead ends: 36 [2024-10-24 16:03:49,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:49,299 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:49,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-24 16:03:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-24 16:03:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-10-24 16:03:49,311 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 3 [2024-10-24 16:03:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:49,312 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-10-24 16:03:49,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2024-10-24 16:03:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-10-24 16:03:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:03:49,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:49,313 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:03:49,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:03:49,314 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:49,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash 128627866, now seen corresponding path program 1 times [2024-10-24 16:03:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711112733] [2024-10-24 16:03:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711112733] [2024-10-24 16:03:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711112733] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:49,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:49,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:03:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729481991] [2024-10-24 16:03:49,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:49,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:03:49,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:03:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:03:49,425 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 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) [2024-10-24 16:03:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:49,486 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2024-10-24 16:03:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:03:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2024-10-24 16:03:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:49,487 INFO L225 Difference]: With dead ends: 54 [2024-10-24 16:03:49,488 INFO L226 Difference]: Without dead ends: 54 [2024-10-24 16:03:49,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:03:49,489 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:49,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 57 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-24 16:03:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-10-24 16:03:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-10-24 16:03:49,497 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 5 [2024-10-24 16:03:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:49,497 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-10-24 16:03:49,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 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) [2024-10-24 16:03:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-10-24 16:03:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:03:49,498 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:49,498 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-10-24 16:03:49,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 16:03:49,499 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:49,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 128773362, now seen corresponding path program 1 times [2024-10-24 16:03:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:49,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985086151] [2024-10-24 16:03:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985086151] [2024-10-24 16:03:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985086151] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676439392] [2024-10-24 16:03:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:49,640 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) [2024-10-24 16:03:49,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:03:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:03:49,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:49,799 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 [2024-10-24 16:03:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676439392] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:49,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:49,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-24 16:03:49,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737206819] [2024-10-24 16:03:49,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:49,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:03:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:03:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:03:49,960 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2024-10-24 16:03:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:50,085 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2024-10-24 16:03:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:03:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 5 [2024-10-24 16:03:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:50,087 INFO L225 Difference]: With dead ends: 45 [2024-10-24 16:03:50,089 INFO L226 Difference]: Without dead ends: 45 [2024-10-24 16:03:50,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:03:50,090 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:50,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 46 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-24 16:03:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-24 16:03:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 41 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-10-24 16:03:50,102 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 5 [2024-10-24 16:03:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:50,102 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-10-24 16:03:50,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2024-10-24 16:03:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-10-24 16:03:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 16:03:50,105 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:50,105 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:50,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 16:03:50,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:50,307 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:50,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -802902658, now seen corresponding path program 1 times [2024-10-24 16:03:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109754961] [2024-10-24 16:03:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:50,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:50,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109754961] [2024-10-24 16:03:50,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109754961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:50,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195260065] [2024-10-24 16:03:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:50,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:50,437 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) [2024-10-24 16:03:50,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:03:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:50,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 16:03:50,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:50,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:50,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-24 16:03:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:50,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195260065] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:50,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:50,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-24 16:03:50,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946545365] [2024-10-24 16:03:50,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:50,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:03:50,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:03:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:03:50,622 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2024-10-24 16:03:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:50,766 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-10-24 16:03:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:03:50,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 7 [2024-10-24 16:03:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:50,771 INFO L225 Difference]: With dead ends: 58 [2024-10-24 16:03:50,771 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 16:03:50,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:03:50,772 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:50,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 70 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 16:03:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2024-10-24 16:03:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.375) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-10-24 16:03:50,784 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 7 [2024-10-24 16:03:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:50,784 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-10-24 16:03:50,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2024-10-24 16:03:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-10-24 16:03:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-24 16:03:50,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:50,785 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:50,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 16:03:50,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:50,986 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:50,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash 840672523, now seen corresponding path program 1 times [2024-10-24 16:03:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:50,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898524092] [2024-10-24 16:03:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:51,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898524092] [2024-10-24 16:03:51,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898524092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:51,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:51,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:03:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940252111] [2024-10-24 16:03:51,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:51,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:03:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:03:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:03:51,076 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-10-24 16:03:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:51,110 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2024-10-24 16:03:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:03:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2024-10-24 16:03:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:51,112 INFO L225 Difference]: With dead ends: 47 [2024-10-24 16:03:51,112 INFO L226 Difference]: Without dead ends: 41 [2024-10-24 16:03:51,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:03:51,114 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:51,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:03:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-24 16:03:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-24 16:03:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-10-24 16:03:51,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 8 [2024-10-24 16:03:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:51,125 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-10-24 16:03:51,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-10-24 16:03:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-10-24 16:03:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:03:51,126 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:51,126 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:51,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 16:03:51,126 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:51,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1427257375, now seen corresponding path program 1 times [2024-10-24 16:03:51,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:51,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164587904] [2024-10-24 16:03:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:51,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164587904] [2024-10-24 16:03:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164587904] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228689383] [2024-10-24 16:03:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:51,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:51,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:51,252 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) [2024-10-24 16:03:51,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:03:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:51,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 16:03:51,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228689383] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:51,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-24 16:03:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528019451] [2024-10-24 16:03:51,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:51,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 16:03:51,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 16:03:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:03:51,400 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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) [2024-10-24 16:03:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:51,554 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2024-10-24 16:03:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:03:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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 11 [2024-10-24 16:03:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:51,556 INFO L225 Difference]: With dead ends: 83 [2024-10-24 16:03:51,556 INFO L226 Difference]: Without dead ends: 80 [2024-10-24 16:03:51,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:03:51,559 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:51,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 102 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-24 16:03:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2024-10-24 16:03:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 56 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:03:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-10-24 16:03:51,572 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 11 [2024-10-24 16:03:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:51,572 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-10-24 16:03:51,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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) [2024-10-24 16:03:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-10-24 16:03:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:03:51,573 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:51,573 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-10-24 16:03:51,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 16:03:51,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:51,775 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:51,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:51,775 INFO L85 PathProgramCache]: Analyzing trace with hash -112124770, now seen corresponding path program 2 times [2024-10-24 16:03:51,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:51,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117515645] [2024-10-24 16:03:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:51,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:51,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117515645] [2024-10-24 16:03:51,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117515645] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:51,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862773833] [2024-10-24 16:03:51,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:03:51,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:51,966 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) [2024-10-24 16:03:51,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:03:52,023 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:03:52,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:52,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 16:03:52,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:52,042 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 [2024-10-24 16:03:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:52,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862773833] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:52,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:52,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-24 16:03:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631478814] [2024-10-24 16:03:52,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:52,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:03:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:03:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-10-24 16:03:52,347 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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) [2024-10-24 16:03:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:52,641 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-10-24 16:03:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:03:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 11 [2024-10-24 16:03:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:52,643 INFO L225 Difference]: With dead ends: 74 [2024-10-24 16:03:52,643 INFO L226 Difference]: Without dead ends: 74 [2024-10-24 16:03:52,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:03:52,645 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:52,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:03:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-24 16:03:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-10-24 16:03:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.3125) internal successors, (84), 68 states have internal predecessors, (84), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:03:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2024-10-24 16:03:52,652 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 11 [2024-10-24 16:03:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:52,652 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2024-10-24 16:03:52,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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) [2024-10-24 16:03:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2024-10-24 16:03:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-24 16:03:52,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:52,653 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:52,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:03:52,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:52,860 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:52,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:52,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1095786401, now seen corresponding path program 1 times [2024-10-24 16:03:52,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:52,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599869080] [2024-10-24 16:03:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:52,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:03:53,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599869080] [2024-10-24 16:03:53,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599869080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:53,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:53,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:03:53,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385914663] [2024-10-24 16:03:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:53,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:03:53,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:03:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:03:53,073 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-10-24 16:03:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:53,165 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2024-10-24 16:03:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:03:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 14 [2024-10-24 16:03:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:53,167 INFO L225 Difference]: With dead ends: 81 [2024-10-24 16:03:53,167 INFO L226 Difference]: Without dead ends: 81 [2024-10-24 16:03:53,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:03:53,168 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:53,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 111 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-24 16:03:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2024-10-24 16:03:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 71 states have internal predecessors, (87), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:03:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-10-24 16:03:53,174 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 14 [2024-10-24 16:03:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:53,174 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-10-24 16:03:53,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-10-24 16:03:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-10-24 16:03:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-24 16:03:53,175 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:53,175 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:53,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 16:03:53,176 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:53,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1692760635, now seen corresponding path program 2 times [2024-10-24 16:03:53,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:53,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142464194] [2024-10-24 16:03:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:03:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142464194] [2024-10-24 16:03:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142464194] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171619998] [2024-10-24 16:03:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:03:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:53,271 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) [2024-10-24 16:03:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:03:53,317 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:03:53,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:53,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 16:03:53,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:53,326 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 [2024-10-24 16:03:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:53,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171619998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:53,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:53,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 17 [2024-10-24 16:03:53,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895165226] [2024-10-24 16:03:53,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:53,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 16:03:53,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 16:03:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2024-10-24 16:03:53,821 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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) [2024-10-24 16:03:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:54,448 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2024-10-24 16:03:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 16:03:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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 13 [2024-10-24 16:03:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:54,450 INFO L225 Difference]: With dead ends: 156 [2024-10-24 16:03:54,450 INFO L226 Difference]: Without dead ends: 156 [2024-10-24 16:03:54,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 16:03:54,454 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 415 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:54,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 150 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:03:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-24 16:03:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 74. [2024-10-24 16:03:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 67 states have internal predecessors, (83), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:03:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2024-10-24 16:03:54,469 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 13 [2024-10-24 16:03:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:54,469 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2024-10-24 16:03:54,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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) [2024-10-24 16:03:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2024-10-24 16:03:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 16:03:54,470 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:54,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:54,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 16:03:54,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 16:03:54,671 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:54,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1925410528, now seen corresponding path program 1 times [2024-10-24 16:03:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:54,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584238576] [2024-10-24 16:03:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:54,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:54,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584238576] [2024-10-24 16:03:54,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584238576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:54,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:54,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:03:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706897436] [2024-10-24 16:03:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:54,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:03:54,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:03:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:03:54,839 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-10-24 16:03:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:54,930 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2024-10-24 16:03:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:03:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 20 [2024-10-24 16:03:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:54,931 INFO L225 Difference]: With dead ends: 72 [2024-10-24 16:03:54,931 INFO L226 Difference]: Without dead ends: 24 [2024-10-24 16:03:54,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:03:54,932 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:54,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 104 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-24 16:03:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-24 16:03:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 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) [2024-10-24 16:03:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2024-10-24 16:03:54,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2024-10-24 16:03:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:54,935 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2024-10-24 16:03:54,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-10-24 16:03:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2024-10-24 16:03:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 16:03:54,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:54,936 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2024-10-24 16:03:54,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 16:03:54,936 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:54,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash -647763722, now seen corresponding path program 3 times [2024-10-24 16:03:54,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:54,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672144760] [2024-10-24 16:03:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:54,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:55,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:55,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672144760] [2024-10-24 16:03:55,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672144760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:55,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58335005] [2024-10-24 16:03:55,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:03:55,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:55,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:55,288 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) [2024-10-24 16:03:55,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:03:55,402 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 16:03:55,402 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:55,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:03:55,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:55,412 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 [2024-10-24 16:03:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:55,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:56,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58335005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:56,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-10-24 16:03:56,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665897832] [2024-10-24 16:03:56,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:56,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 16:03:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 16:03:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 16:03:56,320 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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) [2024-10-24 16:03:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:57,039 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2024-10-24 16:03:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-24 16:03:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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 23 [2024-10-24 16:03:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:57,040 INFO L225 Difference]: With dead ends: 48 [2024-10-24 16:03:57,040 INFO L226 Difference]: Without dead ends: 48 [2024-10-24 16:03:57,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2024-10-24 16:03:57,041 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:57,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:03:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-24 16:03:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-24 16:03:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 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) [2024-10-24 16:03:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2024-10-24 16:03:57,048 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 23 [2024-10-24 16:03:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:57,048 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2024-10-24 16:03:57,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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) [2024-10-24 16:03:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2024-10-24 16:03:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-24 16:03:57,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:57,049 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 1, 1] [2024-10-24 16:03:57,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 16:03:57,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:57,250 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:03:57,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -860342874, now seen corresponding path program 4 times [2024-10-24 16:03:57,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:57,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619998426] [2024-10-24 16:03:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:57,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:58,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:58,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619998426] [2024-10-24 16:03:58,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619998426] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:58,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274399158] [2024-10-24 16:03:58,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:03:58,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:58,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:58,062 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) [2024-10-24 16:03:58,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:03:58,261 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:03:58,261 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:58,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-24 16:03:58,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:58,277 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 [2024-10-24 16:03:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:59,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274399158] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:00,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2024-10-24 16:04:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569697307] [2024-10-24 16:04:00,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:00,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-24 16:04:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-24 16:04:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=3750, Unknown=0, NotChecked=0, Total=4970 [2024-10-24 16:04:00,586 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 71 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 states have internal predecessors, (141), 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) [2024-10-24 16:04:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:03,305 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2024-10-24 16:04:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-24 16:04:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 states have internal predecessors, (141), 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 47 [2024-10-24 16:04:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:03,306 INFO L225 Difference]: With dead ends: 96 [2024-10-24 16:04:03,306 INFO L226 Difference]: Without dead ends: 96 [2024-10-24 16:04:03,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2782, Invalid=5774, Unknown=0, NotChecked=0, Total=8556 [2024-10-24 16:04:03,308 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:03,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:04:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-24 16:04:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-10-24 16:04:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 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) [2024-10-24 16:04:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2024-10-24 16:04:03,312 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 47 [2024-10-24 16:04:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:03,312 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2024-10-24 16:04:03,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 states have internal predecessors, (141), 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) [2024-10-24 16:04:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2024-10-24 16:04:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-24 16:04:03,314 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:03,315 INFO L215 NwaCegarLoop]: trace histogram [47, 46, 1, 1] [2024-10-24 16:04:03,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 16:04:03,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:03,516 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:04:03,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1069784838, now seen corresponding path program 5 times [2024-10-24 16:04:03,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:03,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896237023] [2024-10-24 16:04:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:06,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896237023] [2024-10-24 16:04:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896237023] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583830561] [2024-10-24 16:04:06,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 16:04:06,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:06,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:06,150 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) [2024-10-24 16:04:06,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:04:22,925 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-10-24 16:04:22,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:22,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-10-24 16:04:22,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:22,957 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 [2024-10-24 16:04:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:25,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583830561] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:29,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:29,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 140 [2024-10-24 16:04:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429452305] [2024-10-24 16:04:29,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:29,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2024-10-24 16:04:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2024-10-24 16:04:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4698, Invalid=15324, Unknown=0, NotChecked=0, Total=20022 [2024-10-24 16:04:29,209 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 142 states, 141 states have (on average 2.00709219858156) internal successors, (283), 141 states have internal predecessors, (283), 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) [2024-10-24 16:04:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:39,608 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2024-10-24 16:04:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-10-24 16:04:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 2.00709219858156) internal successors, (283), 141 states have internal predecessors, (283), 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 95 [2024-10-24 16:04:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:39,609 INFO L225 Difference]: With dead ends: 192 [2024-10-24 16:04:39,610 INFO L226 Difference]: Without dead ends: 192 [2024-10-24 16:04:39,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10626 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=11230, Invalid=23926, Unknown=0, NotChecked=0, Total=35156 [2024-10-24 16:04:39,616 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7027 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:39,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 7028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7027 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-24 16:04:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-10-24 16:04:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-10-24 16:04:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 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) [2024-10-24 16:04:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2024-10-24 16:04:39,620 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 95 [2024-10-24 16:04:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:39,620 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2024-10-24 16:04:39,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 2.00709219858156) internal successors, (283), 141 states have internal predecessors, (283), 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) [2024-10-24 16:04:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2024-10-24 16:04:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-10-24 16:04:39,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:39,631 INFO L215 NwaCegarLoop]: trace histogram [95, 94, 1, 1] [2024-10-24 16:04:39,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 16:04:39,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 16:04:39,832 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-10-24 16:04:39,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1285927366, now seen corresponding path program 6 times [2024-10-24 16:04:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:39,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822983262] [2024-10-24 16:04:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:47,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:47,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822983262] [2024-10-24 16:04:47,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822983262] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:47,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776905770] [2024-10-24 16:04:47,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 16:04:47,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:47,189 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:47,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process