./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/memsafety/20051113-1.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/memsafety/20051113-1.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 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 17:01:57,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 17:01:57,082 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 17:01:57,088 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 17:01:57,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 17:01:57,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 17:01:57,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 17:01:57,112 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 17:01:57,113 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 17:01:57,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 17:01:57,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 17:01:57,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 17:01:57,117 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 17:01:57,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 17:01:57,119 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 17:01:57,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 17:01:57,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 17:01:57,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 17:01:57,119 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 17:01:57,120 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 17:01:57,120 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 17:01:57,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 17:01:57,121 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 17:01:57,121 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 17:01:57,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 17:01:57,121 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 17:01:57,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 17:01:57,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 17:01:57,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 17:01:57,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 17:01:57,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:01:57,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 17:01:57,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 17:01:57,124 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 17:01:57,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 17:01:57,124 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 17:01:57,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 17:01:57,124 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 17:01:57,125 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 17:01:57,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 17:01:57,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 17:01:57,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 17:01:57,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 17:01:57,378 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 17:01:57,379 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 17:01:57,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/20051113-1.i [2023-11-22 17:01:58,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 17:01:58,617 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 17:01:58,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/memsafety/20051113-1.i [2023-11-22 17:01:58,633 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d553409/2eb09c0f9ff047838b0fbb787c1bf190/FLAGc9fc9ad5c [2023-11-22 17:01:58,644 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d553409/2eb09c0f9ff047838b0fbb787c1bf190 [2023-11-22 17:01:58,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 17:01:58,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 17:01:58,648 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 17:01:58,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 17:01:58,654 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 17:01:58,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:01:58" (1/1) ... [2023-11-22 17:01:58,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8f1311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:58, skipping insertion in model container [2023-11-22 17:01:58,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:01:58" (1/1) ... [2023-11-22 17:01:58,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:01:58,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:01:58,938 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 17:01:58,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:01:58,999 INFO L206 MainTranslator]: Completed translation [2023-11-22 17:01:59,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59 WrapperNode [2023-11-22 17:01:59,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 17:01:59,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 17:01:59,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 17:01:59,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 17:01:59,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,040 INFO L138 Inliner]: procedures = 125, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2023-11-22 17:01:59,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 17:01:59,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 17:01:59,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 17:01:59,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 17:01:59,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,064 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,080 INFO L189 HeapSplitter]: Split 13 memory accesses to 2 slices as follows [2, 11] [2023-11-22 17:01:59,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 17:01:59,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 17:01:59,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 17:01:59,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 17:01:59,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (1/1) ... [2023-11-22 17:01:59,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:01:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:59,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 17:01:59,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 17:01:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 17:01:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 17:01:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure dummy_abort [2023-11-22 17:01:59,169 INFO L138 BoogieDeclarations]: Found implementation of procedure dummy_abort [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 17:01:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 17:01:59,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 17:01:59,258 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 17:01:59,260 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 17:01:59,485 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 17:01:59,518 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 17:01:59,518 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 17:01:59,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:01:59 BoogieIcfgContainer [2023-11-22 17:01:59,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 17:01:59,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 17:01:59,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 17:01:59,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 17:01:59,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 05:01:58" (1/3) ... [2023-11-22 17:01:59,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d34944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:01:59, skipping insertion in model container [2023-11-22 17:01:59,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:59" (2/3) ... [2023-11-22 17:01:59,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d34944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:01:59, skipping insertion in model container [2023-11-22 17:01:59,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:01:59" (3/3) ... [2023-11-22 17:01:59,528 INFO L112 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2023-11-22 17:01:59,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 17:01:59,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-11-22 17:01:59,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 17:01:59,603 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@4b4fccf4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 17:01:59,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-22 17:01:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 25 states have (on average 2.28) internal successors, (57), 52 states have internal predecessors, (57), 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) [2023-11-22 17:01:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-22 17:01:59,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:59,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-22 17:01:59,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:01:59,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 4499, now seen corresponding path program 1 times [2023-11-22 17:01:59,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339816227] [2023-11-22 17:01:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:59,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:01:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339816227] [2023-11-22 17:01:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339816227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:59,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:01:59,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45397533] [2023-11-22 17:01:59,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:01:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:59,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:01:59,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:01:59,815 INFO L87 Difference]: Start difference. First operand has 54 states, 25 states have (on average 2.28) internal successors, (57), 52 states have internal predecessors, (57), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-22 17:01:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:59,884 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-22 17:01:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:01:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-22 17:01:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:59,890 INFO L225 Difference]: With dead ends: 53 [2023-11-22 17:01:59,891 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 17:01:59,892 INFO L412 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 [2023-11-22 17:01:59,895 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:59,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 17:01:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-22 17:01:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 25 states have (on average 2.12) internal successors, (53), 50 states have internal predecessors, (53), 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) [2023-11-22 17:01:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2023-11-22 17:01:59,945 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 2 [2023-11-22 17:01:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:59,945 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2023-11-22 17:01:59,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-22 17:01:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2023-11-22 17:01:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-22 17:01:59,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:59,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-22 17:01:59,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 17:01:59,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:01:59,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:59,947 INFO L85 PathProgramCache]: Analyzing trace with hash 139506, now seen corresponding path program 1 times [2023-11-22 17:01:59,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:59,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155833080] [2023-11-22 17:01:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:59,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:00,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155833080] [2023-11-22 17:02:00,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155833080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:00,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:00,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:02:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053909052] [2023-11-22 17:02:00,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:00,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:02:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:02:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:02:00,042 INFO L87 Difference]: Start difference. First operand 52 states and 57 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) [2023-11-22 17:02:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:00,097 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-11-22 17:02:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:02:00,097 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 [2023-11-22 17:02:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:00,098 INFO L225 Difference]: With dead ends: 51 [2023-11-22 17:02:00,098 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 17:02:00,100 INFO L412 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 [2023-11-22 17:02:00,102 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:00,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 17:02:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-22 17:02:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 25 states have (on average 2.08) internal successors, (52), 49 states have internal predecessors, (52), 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) [2023-11-22 17:02:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-11-22 17:02:00,110 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 3 [2023-11-22 17:02:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:00,110 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-11-22 17:02:00,110 INFO L496 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) [2023-11-22 17:02:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-11-22 17:02:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-22 17:02:00,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:00,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 17:02:00,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 17:02:00,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:00,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash 134069809, now seen corresponding path program 1 times [2023-11-22 17:02:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389813739] [2023-11-22 17:02:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:00,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:00,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389813739] [2023-11-22 17:02:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389813739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:00,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:00,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:02:00,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162985958] [2023-11-22 17:02:00,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:00,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:02:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:02:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:02:00,223 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 5 states, 4 states have (on average 1.25) 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) [2023-11-22 17:02:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:00,293 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-11-22 17:02:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) 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 [2023-11-22 17:02:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:00,295 INFO L225 Difference]: With dead ends: 44 [2023-11-22 17:02:00,297 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 17:02:00,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:02:00,302 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:00,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 33 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 17:02:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-22 17:02:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.8) internal successors, (45), 42 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) [2023-11-22 17:02:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-11-22 17:02:00,306 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 5 [2023-11-22 17:02:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:00,306 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-11-22 17:02:00,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) 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) [2023-11-22 17:02:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-11-22 17:02:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-22 17:02:00,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:00,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 17:02:00,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 17:02:00,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:00,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 134069810, now seen corresponding path program 1 times [2023-11-22 17:02:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:00,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095508320] [2023-11-22 17:02:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:00,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:00,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095508320] [2023-11-22 17:02:00,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095508320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:00,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:00,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:02:00,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117584058] [2023-11-22 17:02:00,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:00,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:02:00,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:02:00,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:02:00,470 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 5 states, 4 states have (on average 1.25) 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) [2023-11-22 17:02:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:00,548 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-11-22 17:02:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) 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 [2023-11-22 17:02:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:00,549 INFO L225 Difference]: With dead ends: 37 [2023-11-22 17:02:00,549 INFO L226 Difference]: Without dead ends: 37 [2023-11-22 17:02:00,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-22 17:02:00,555 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:00,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-22 17:02:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-22 17:02:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.52) internal successors, (38), 35 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) [2023-11-22 17:02:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-22 17:02:00,563 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 5 [2023-11-22 17:02:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:00,563 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-22 17:02:00,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) 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) [2023-11-22 17:02:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-22 17:02:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 17:02:00,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:00,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 17:02:00,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:00,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash 519534435, now seen corresponding path program 1 times [2023-11-22 17:02:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403275004] [2023-11-22 17:02:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:00,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:00,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403275004] [2023-11-22 17:02:00,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403275004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:00,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:00,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:02:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679845187] [2023-11-22 17:02:00,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:00,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:02:00,662 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-11-22 17:02:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:00,706 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-22 17:02:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2023-11-22 17:02:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:00,707 INFO L225 Difference]: With dead ends: 35 [2023-11-22 17:02:00,708 INFO L226 Difference]: Without dead ends: 35 [2023-11-22 17:02:00,708 INFO L412 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 [2023-11-22 17:02:00,709 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:00,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-22 17:02:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-22 17:02:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 33 states have internal predecessors, (36), 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) [2023-11-22 17:02:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-22 17:02:00,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2023-11-22 17:02:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:00,714 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-22 17:02:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-11-22 17:02:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-22 17:02:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 17:02:00,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:00,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:00,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 17:02:00,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:00,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash 519534436, now seen corresponding path program 1 times [2023-11-22 17:02:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:00,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599636313] [2023-11-22 17:02:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:00,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:00,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599636313] [2023-11-22 17:02:00,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599636313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:00,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:00,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:02:00,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031529818] [2023-11-22 17:02:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:00,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:00,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:00,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:02:00,872 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-22 17:02:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:00,926 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-11-22 17:02:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-11-22 17:02:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:00,930 INFO L225 Difference]: With dead ends: 34 [2023-11-22 17:02:00,930 INFO L226 Difference]: Without dead ends: 34 [2023-11-22 17:02:00,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:02:00,931 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:00,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 34 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-22 17:02:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-22 17:02:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.4) internal successors, (35), 32 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) [2023-11-22 17:02:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-22 17:02:00,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2023-11-22 17:02:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:00,944 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-22 17:02:00,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-22 17:02:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-22 17:02:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 17:02:00,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:00,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:00,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 17:02:00,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:00,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1056386277, now seen corresponding path program 1 times [2023-11-22 17:02:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:00,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48711866] [2023-11-22 17:02:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:01,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48711866] [2023-11-22 17:02:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48711866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:01,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:02:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718953800] [2023-11-22 17:02:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:02:01,051 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-22 17:02:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:01,127 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-11-22 17:02:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:01,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2023-11-22 17:02:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:01,128 INFO L225 Difference]: With dead ends: 38 [2023-11-22 17:02:01,128 INFO L226 Difference]: Without dead ends: 38 [2023-11-22 17:02:01,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:02:01,128 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:01,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-22 17:02:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-22 17:02:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 35 states have internal predecessors, (39), 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) [2023-11-22 17:02:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-22 17:02:01,131 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 14 [2023-11-22 17:02:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:01,132 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-22 17:02:01,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-22 17:02:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-22 17:02:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-22 17:02:01,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:01,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:01,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 17:02:01,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:01,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1579998924, now seen corresponding path program 1 times [2023-11-22 17:02:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:01,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131000029] [2023-11-22 17:02:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:01,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:01,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131000029] [2023-11-22 17:02:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131000029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587894943] [2023-11-22 17:02:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:01,281 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) [2023-11-22 17:02:01,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 17:02:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 17:02:01,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:01,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:01,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:01,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2023-11-22 17:02:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587894943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:01,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:01,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-11-22 17:02:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603485722] [2023-11-22 17:02:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 17:02:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 17:02:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-22 17:02:01,746 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2023-11-22 17:02:01,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:01,893 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-11-22 17:02:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 17:02:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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 17 [2023-11-22 17:02:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:01,895 INFO L225 Difference]: With dead ends: 46 [2023-11-22 17:02:01,895 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 17:02:01,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-22 17:02:01,896 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:01,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 75 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 17:02:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-22 17:02:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 41 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) [2023-11-22 17:02:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-22 17:02:01,899 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 17 [2023-11-22 17:02:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:01,899 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-22 17:02:01,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2023-11-22 17:02:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-22 17:02:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-22 17:02:01,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:01,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:01,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:02,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:02,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:02,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1578355295, now seen corresponding path program 1 times [2023-11-22 17:02:02,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979787853] [2023-11-22 17:02:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:02,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979787853] [2023-11-22 17:02:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979787853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:02,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:02,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:02:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785274554] [2023-11-22 17:02:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:02,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:02,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:02,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:02,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:02:02,149 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2023-11-22 17:02:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:02,184 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-11-22 17:02:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2023-11-22 17:02:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:02,185 INFO L225 Difference]: With dead ends: 41 [2023-11-22 17:02:02,185 INFO L226 Difference]: Without dead ends: 41 [2023-11-22 17:02:02,185 INFO L412 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 [2023-11-22 17:02:02,185 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:02,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-22 17:02:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-22 17:02:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 39 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) [2023-11-22 17:02:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-22 17:02:02,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 17 [2023-11-22 17:02:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:02,188 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-22 17:02:02,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2023-11-22 17:02:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-22 17:02:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-22 17:02:02,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:02,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 17:02:02,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:02,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:02,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1578355296, now seen corresponding path program 1 times [2023-11-22 17:02:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:02,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425836340] [2023-11-22 17:02:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:02,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425836340] [2023-11-22 17:02:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425836340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:02,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 17:02:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131223222] [2023-11-22 17:02:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:02,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:02:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:02:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:02:02,367 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2023-11-22 17:02:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:02,417 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-11-22 17:02:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:02:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 17 [2023-11-22 17:02:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:02,418 INFO L225 Difference]: With dead ends: 41 [2023-11-22 17:02:02,418 INFO L226 Difference]: Without dead ends: 41 [2023-11-22 17:02:02,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-22 17:02:02,418 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:02,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-22 17:02:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-22 17:02:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 39 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) [2023-11-22 17:02:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-11-22 17:02:02,421 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 17 [2023-11-22 17:02:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:02,421 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-11-22 17:02:02,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2023-11-22 17:02:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-11-22 17:02:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 17:02:02,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:02,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 17:02:02,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:02,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1201503001, now seen corresponding path program 1 times [2023-11-22 17:02:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924158699] [2023-11-22 17:02:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:02,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924158699] [2023-11-22 17:02:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924158699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:02,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964332542] [2023-11-22 17:02:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:02,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:02,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:02,618 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) [2023-11-22 17:02:02,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 17:02:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 17:02:02,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:02,699 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 [2023-11-22 17:02:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 17:02:02,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:02:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964332542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:02,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 17:02:02,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-22 17:02:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960079480] [2023-11-22 17:02:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:02,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:02,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-22 17:02:02,766 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-22 17:02:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:02,798 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-22 17:02:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 20 [2023-11-22 17:02:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:02,799 INFO L225 Difference]: With dead ends: 40 [2023-11-22 17:02:02,799 INFO L226 Difference]: Without dead ends: 40 [2023-11-22 17:02:02,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:02:02,800 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:02,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-22 17:02:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-22 17:02:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 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) [2023-11-22 17:02:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-11-22 17:02:02,803 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2023-11-22 17:02:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:02,803 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-11-22 17:02:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-22 17:02:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-11-22 17:02:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-22 17:02:02,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:02,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:02,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:03,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 17:02:03,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:03,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -701818054, now seen corresponding path program 1 times [2023-11-22 17:02:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143853869] [2023-11-22 17:02:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143853869] [2023-11-22 17:02:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143853869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700542940] [2023-11-22 17:02:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:03,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:03,287 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) [2023-11-22 17:02:03,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 17:02:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 17:02:03,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 17:02:03,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:02:03,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700542940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:03,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 17:02:03,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-22 17:02:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467585883] [2023-11-22 17:02:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 17:02:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 17:02:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-22 17:02:03,495 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-11-22 17:02:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:03,586 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-11-22 17:02:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 17:02:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 22 [2023-11-22 17:02:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:03,588 INFO L225 Difference]: With dead ends: 44 [2023-11-22 17:02:03,588 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 17:02:03,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-22 17:02:03,590 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:03,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 17:02:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-11-22 17:02:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 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) [2023-11-22 17:02:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-22 17:02:03,594 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 22 [2023-11-22 17:02:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:03,594 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-22 17:02:03,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-11-22 17:02:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-22 17:02:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 17:02:03,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:03,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:03,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:03,817 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:03,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1440938028, now seen corresponding path program 2 times [2023-11-22 17:02:03,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:03,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544951851] [2023-11-22 17:02:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:02:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544951851] [2023-11-22 17:02:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544951851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705373794] [2023-11-22 17:02:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:02:04,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:04,037 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) [2023-11-22 17:02:04,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 17:02:04,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 17:02:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:02:04,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 17:02:04,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-22 17:02:04,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:02:04,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705373794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:04,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 17:02:04,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-11-22 17:02:04,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909858864] [2023-11-22 17:02:04,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:04,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-22 17:02:04,137 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-22 17:02:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:04,151 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-11-22 17:02:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 23 [2023-11-22 17:02:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:04,152 INFO L225 Difference]: With dead ends: 44 [2023-11-22 17:02:04,152 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 17:02:04,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-22 17:02:04,153 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:04,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 17:02:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-22 17:02:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 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) [2023-11-22 17:02:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-11-22 17:02:04,155 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2023-11-22 17:02:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:04,156 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-11-22 17:02:04,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-22 17:02:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-11-22 17:02:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 17:02:04,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:04,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:04,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:04,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:04,378 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:04,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1089183695, now seen corresponding path program 1 times [2023-11-22 17:02:04,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:04,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527519541] [2023-11-22 17:02:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:02:04,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527519541] [2023-11-22 17:02:04,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527519541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923386355] [2023-11-22 17:02:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:04,612 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) [2023-11-22 17:02:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 17:02:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:04,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 17:02:04,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:04,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 17:02:04,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-22 17:02:04,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:04,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-22 17:02:04,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:04,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-22 17:02:04,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:04,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2023-11-22 17:02:04,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:04,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-22 17:02:04,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:04,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2023-11-22 17:02:05,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:05,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 16 [2023-11-22 17:02:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:02:05,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:02:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923386355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:05,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 22 [2023-11-22 17:02:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981569137] [2023-11-22 17:02:05,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:05,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 17:02:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 17:02:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-11-22 17:02:05,162 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) [2023-11-22 17:02:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:05,457 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-11-22 17:02:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 17:02:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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 24 [2023-11-22 17:02:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:05,458 INFO L225 Difference]: With dead ends: 44 [2023-11-22 17:02:05,458 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 17:02:05,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2023-11-22 17:02:05,459 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:05,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 142 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 17:02:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-22 17:02:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 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) [2023-11-22 17:02:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-22 17:02:05,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2023-11-22 17:02:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:05,461 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-22 17:02:05,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) [2023-11-22 17:02:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-22 17:02:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 17:02:05,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:05,462 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:05,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:05,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 17:02:05,674 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:05,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:05,674 INFO L85 PathProgramCache]: Analyzing trace with hash -457044023, now seen corresponding path program 1 times [2023-11-22 17:02:05,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:05,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005199035] [2023-11-22 17:02:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:05,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 17:02:05,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005199035] [2023-11-22 17:02:05,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005199035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:05,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:02:05,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:02:05,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148983034] [2023-11-22 17:02:05,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:05,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:02:05,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:02:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:02:05,712 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2023-11-22 17:02:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:05,724 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-11-22 17:02:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:02:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 26 [2023-11-22 17:02:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:05,724 INFO L225 Difference]: With dead ends: 44 [2023-11-22 17:02:05,724 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 17:02:05,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:02:05,725 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:05,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 17:02:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-22 17:02:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 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) [2023-11-22 17:02:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-22 17:02:05,727 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2023-11-22 17:02:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:05,727 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-22 17:02:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2023-11-22 17:02:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-22 17:02:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 17:02:05,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:05,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-22 17:02:05,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:05,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash -455340809, now seen corresponding path program 1 times [2023-11-22 17:02:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775157569] [2023-11-22 17:02:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:02:05,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775157569] [2023-11-22 17:02:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775157569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991443613] [2023-11-22 17:02:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:05,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:05,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:05,907 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) [2023-11-22 17:02:05,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 17:02:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:05,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 17:02:05,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 17:02:06,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:06,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:06,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2023-11-22 17:02:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 17:02:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991443613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:06,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:06,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-22 17:02:06,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045985315] [2023-11-22 17:02:06,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:06,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 17:02:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 17:02:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-22 17:02:06,286 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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) [2023-11-22 17:02:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:06,501 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-11-22 17:02:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 17:02:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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 26 [2023-11-22 17:02:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:06,501 INFO L225 Difference]: With dead ends: 52 [2023-11-22 17:02:06,501 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 17:02:06,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-11-22 17:02:06,502 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:06,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 61 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 17:02:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-11-22 17:02:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2) internal successors, (54), 48 states have internal predecessors, (54), 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) [2023-11-22 17:02:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-22 17:02:06,504 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 26 [2023-11-22 17:02:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:06,504 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-22 17:02:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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) [2023-11-22 17:02:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-22 17:02:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 17:02:06,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:06,505 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:06,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:06,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 17:02:06,712 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:06,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1563209628, now seen corresponding path program 1 times [2023-11-22 17:02:06,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:06,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919780947] [2023-11-22 17:02:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:06,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 17:02:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:02:06,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919780947] [2023-11-22 17:02:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919780947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773277710] [2023-11-22 17:02:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:06,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:06,980 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) [2023-11-22 17:02:07,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 17:02:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 17:02:07,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:07,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 17:02:07,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-22 17:02:07,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-22 17:02:07,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-22 17:02:07,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2023-11-22 17:02:07,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-22 17:02:07,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2023-11-22 17:02:07,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 16 [2023-11-22 17:02:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 17:02:07,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:02:07,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773277710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:02:07,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 17:02:07,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2023-11-22 17:02:07,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641821147] [2023-11-22 17:02:07,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:02:07,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 17:02:07,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:07,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 17:02:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-22 17:02:07,273 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 17:02:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:07,372 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-11-22 17:02:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 17:02:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-11-22 17:02:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:07,373 INFO L225 Difference]: With dead ends: 48 [2023-11-22 17:02:07,373 INFO L226 Difference]: Without dead ends: 48 [2023-11-22 17:02:07,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-22 17:02:07,373 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:07,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-22 17:02:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-22 17:02:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 46 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) [2023-11-22 17:02:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-11-22 17:02:07,376 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 32 [2023-11-22 17:02:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:07,376 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-11-22 17:02:07,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 17:02:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-11-22 17:02:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 17:02:07,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:07,377 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:07,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:07,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:07,584 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:07,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2014216120, now seen corresponding path program 1 times [2023-11-22 17:02:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405383669] [2023-11-22 17:02:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 17:02:07,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:07,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405383669] [2023-11-22 17:02:07,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405383669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:07,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909309945] [2023-11-22 17:02:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:07,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:07,827 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) [2023-11-22 17:02:07,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 17:02:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 17:02:07,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:07,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 17:02:07,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-22 17:02:07,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2023-11-22 17:02:07,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:07,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2023-11-22 17:02:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 17:02:08,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 17:02:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909309945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:08,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:08,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-22 17:02:08,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412254989] [2023-11-22 17:02:08,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 17:02:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 17:02:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-22 17:02:08,074 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 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) [2023-11-22 17:02:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:08,335 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-22 17:02:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 17:02:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 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 32 [2023-11-22 17:02:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:08,337 INFO L225 Difference]: With dead ends: 52 [2023-11-22 17:02:08,337 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 17:02:08,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2023-11-22 17:02:08,337 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:08,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 105 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 17:02:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-11-22 17:02:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 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) [2023-11-22 17:02:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-22 17:02:08,339 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 32 [2023-11-22 17:02:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:08,339 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-22 17:02:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 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) [2023-11-22 17:02:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-22 17:02:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 17:02:08,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:08,340 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:08,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:08,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 17:02:08,540 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:08,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1595935403, now seen corresponding path program 1 times [2023-11-22 17:02:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387257182] [2023-11-22 17:02:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:08,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-22 17:02:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 17:02:08,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:08,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387257182] [2023-11-22 17:02:08,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387257182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:08,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305507385] [2023-11-22 17:02:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:08,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:08,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:08,810 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) [2023-11-22 17:02:08,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 17:02:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:08,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 17:02:08,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:08,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 17:02:08,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-22 17:02:08,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:08,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-22 17:02:08,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:08,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-22 17:02:08,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:08,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2023-11-22 17:02:08,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:08,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-22 17:02:08,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:08,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2023-11-22 17:02:09,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:09,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 16 [2023-11-22 17:02:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 17:02:09,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 17:02:09,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305507385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:09,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:09,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 19 [2023-11-22 17:02:09,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543170374] [2023-11-22 17:02:09,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:09,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 17:02:09,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 17:02:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-22 17:02:09,196 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 17:02:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:09,470 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-22 17:02:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 17:02:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-11-22 17:02:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:09,471 INFO L225 Difference]: With dead ends: 48 [2023-11-22 17:02:09,471 INFO L226 Difference]: Without dead ends: 48 [2023-11-22 17:02:09,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2023-11-22 17:02:09,471 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:09,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-22 17:02:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-22 17:02:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 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) [2023-11-22 17:02:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-22 17:02:09,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 38 [2023-11-22 17:02:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:09,474 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-22 17:02:09,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 17:02:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-22 17:02:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 17:02:09,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:09,474 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:09,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:09,686 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:09,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1983193559, now seen corresponding path program 2 times [2023-11-22 17:02:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:09,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538011407] [2023-11-22 17:02:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 17:02:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538011407] [2023-11-22 17:02:09,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538011407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055701182] [2023-11-22 17:02:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:02:09,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:09,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:02:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 17:02:10,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 17:02:10,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:02:10,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 17:02:10,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:10,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:02:10,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:02:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:02:10,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:02:10,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055701182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:10,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:10,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2023-11-22 17:02:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869776820] [2023-11-22 17:02:10,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-22 17:02:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-22 17:02:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2023-11-22 17:02:10,495 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 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) [2023-11-22 17:02:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:10,894 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2023-11-22 17:02:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 17:02:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 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 38 [2023-11-22 17:02:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:10,895 INFO L225 Difference]: With dead ends: 46 [2023-11-22 17:02:10,895 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 17:02:10,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2023-11-22 17:02:10,896 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:10,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 143 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 17:02:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 17:02:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-22 17:02:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 44 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) [2023-11-22 17:02:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-11-22 17:02:10,898 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 38 [2023-11-22 17:02:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:10,898 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-11-22 17:02:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 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) [2023-11-22 17:02:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-11-22 17:02:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-22 17:02:10,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:10,899 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:10,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:11,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:11,111 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:11,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:11,111 INFO L85 PathProgramCache]: Analyzing trace with hash -251515577, now seen corresponding path program 2 times [2023-11-22 17:02:11,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:11,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266303248] [2023-11-22 17:02:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:11,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:11,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266303248] [2023-11-22 17:02:11,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266303248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850441773] [2023-11-22 17:02:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:02:11,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:11,231 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:02:11,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 17:02:11,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 17:02:11,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:02:11,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 17:02:11,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:11,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:11,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850441773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:11,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:11,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-22 17:02:11,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080370400] [2023-11-22 17:02:11,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 17:02:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 17:02:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:02:11,414 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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) [2023-11-22 17:02:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:11,452 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-11-22 17:02:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 17:02:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 41 [2023-11-22 17:02:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:11,453 INFO L225 Difference]: With dead ends: 49 [2023-11-22 17:02:11,453 INFO L226 Difference]: Without dead ends: 49 [2023-11-22 17:02:11,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-22 17:02:11,454 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:11,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 99 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:02:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-22 17:02:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-22 17:02:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 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) [2023-11-22 17:02:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-11-22 17:02:11,456 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2023-11-22 17:02:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:11,456 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-11-22 17:02:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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) [2023-11-22 17:02:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-11-22 17:02:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-22 17:02:11,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:11,457 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:11,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:11,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-22 17:02:11,668 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:11,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1713997460, now seen corresponding path program 3 times [2023-11-22 17:02:11,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:11,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311730374] [2023-11-22 17:02:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:11,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:11,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:11,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311730374] [2023-11-22 17:02:11,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311730374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:11,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143660116] [2023-11-22 17:02:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 17:02:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:11,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:11,862 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:02:11,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 17:02:12,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 17:02:12,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:02:12,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 17:02:12,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:12,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143660116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:12,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:12,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-22 17:02:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612923400] [2023-11-22 17:02:12,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 17:02:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 17:02:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2023-11-22 17:02:12,210 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 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) [2023-11-22 17:02:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:12,381 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-11-22 17:02:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 17:02:12,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 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 44 [2023-11-22 17:02:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:12,382 INFO L225 Difference]: With dead ends: 55 [2023-11-22 17:02:12,382 INFO L226 Difference]: Without dead ends: 55 [2023-11-22 17:02:12,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2023-11-22 17:02:12,382 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:12,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 223 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-22 17:02:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-22 17:02:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 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) [2023-11-22 17:02:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2023-11-22 17:02:12,384 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 44 [2023-11-22 17:02:12,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:12,384 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2023-11-22 17:02:12,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 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) [2023-11-22 17:02:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2023-11-22 17:02:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-22 17:02:12,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:12,385 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:12,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:12,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-22 17:02:12,585 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:12,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash 735140748, now seen corresponding path program 4 times [2023-11-22 17:02:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:12,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853632013] [2023-11-22 17:02:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:12,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:12,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853632013] [2023-11-22 17:02:12,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853632013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44462551] [2023-11-22 17:02:12,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 17:02:12,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:12,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:12,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:02:12,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 17:02:13,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 17:02:13,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:02:13,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 17:02:13,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:13,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:13,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44462551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:13,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:13,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-11-22 17:02:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204071642] [2023-11-22 17:02:13,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:13,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-22 17:02:13,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-22 17:02:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2023-11-22 17:02:13,529 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 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) [2023-11-22 17:02:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:14,842 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2023-11-22 17:02:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 17:02:14,842 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 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 50 [2023-11-22 17:02:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:14,843 INFO L225 Difference]: With dead ends: 67 [2023-11-22 17:02:14,843 INFO L226 Difference]: Without dead ends: 67 [2023-11-22 17:02:14,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=648, Invalid=1514, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 17:02:14,844 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:14,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 373 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-22 17:02:14,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-22 17:02:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 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) [2023-11-22 17:02:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2023-11-22 17:02:14,845 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 50 [2023-11-22 17:02:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:14,845 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2023-11-22 17:02:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 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) [2023-11-22 17:02:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2023-11-22 17:02:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-22 17:02:14,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:14,846 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:14,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-22 17:02:15,057 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:15,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1636116532, now seen corresponding path program 5 times [2023-11-22 17:02:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:15,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229520007] [2023-11-22 17:02:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:15,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:15,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229520007] [2023-11-22 17:02:15,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229520007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:15,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770115915] [2023-11-22 17:02:15,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 17:02:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:15,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:02:15,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 17:02:16,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-22 17:02:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:02:16,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 17:02:16,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:17,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770115915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:18,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:18,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2023-11-22 17:02:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542171535] [2023-11-22 17:02:18,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:18,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-22 17:02:18,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-22 17:02:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2023-11-22 17:02:18,642 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 72 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 71 states have internal predecessors, (97), 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) [2023-11-22 17:02:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:35,367 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2023-11-22 17:02:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-22 17:02:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 71 states have internal predecessors, (97), 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 62 [2023-11-22 17:02:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:35,369 INFO L225 Difference]: With dead ends: 91 [2023-11-22 17:02:35,369 INFO L226 Difference]: Without dead ends: 91 [2023-11-22 17:02:35,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=2460, Invalid=6470, Unknown=0, NotChecked=0, Total=8930 [2023-11-22 17:02:35,371 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:35,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 698 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 17:02:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-22 17:02:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-22 17:02:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 89 states have internal predecessors, (90), 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) [2023-11-22 17:02:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2023-11-22 17:02:35,373 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 62 [2023-11-22 17:02:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:35,373 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2023-11-22 17:02:35,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 71 states have internal predecessors, (97), 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) [2023-11-22 17:02:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2023-11-22 17:02:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-22 17:02:35,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:35,373 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:35,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:35,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:35,581 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-22 17:02:35,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 747941964, now seen corresponding path program 6 times [2023-11-22 17:02:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:35,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109670304] [2023-11-22 17:02:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:35,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 17:02:37,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109670304] [2023-11-22 17:02:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109670304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415919548] [2023-11-22 17:02:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 17:02:37,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:37,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:02:37,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process Killed by 15