./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/list-simple/dll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c4f91361 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/list-simple/dll2c_update_all_reverse.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 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:45:23,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:45:23,498 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 15:45:23,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:45:23,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:45:23,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:45:23,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:45:23,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:45:23,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:45:23,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:45:23,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:45:23,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:45:23,550 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:45:23,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:45:23,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:45:23,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:45:23,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:45:23,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:45:23,552 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 15:45:23,552 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 15:45:23,553 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 15:45:23,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:45:23,561 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 15:45:23,561 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 15:45:23,565 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:45:23,565 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:45:23,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:45:23,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:45:23,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:45:23,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:45:23,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:45:23,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:45:23,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:45:23,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 15:45:23,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 15:45:23,569 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:45:23,569 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:45:23,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:45:23,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:45:23,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 [2023-11-23 15:45:23,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:45:23,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:45:23,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:45:23,832 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:45:23,833 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:45:23,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_update_all_reverse.i [2023-11-23 15:45:25,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:45:25,352 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:45:25,353 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_update_all_reverse.i [2023-11-23 15:45:25,366 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f926aa13/57758aad6114452ea20686f199b211cb/FLAGc8d453e15 [2023-11-23 15:45:25,378 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f926aa13/57758aad6114452ea20686f199b211cb [2023-11-23 15:45:25,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:45:25,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:45:25,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:45:25,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:45:25,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:45:25,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aea2479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25, skipping insertion in model container [2023-11-23 15:45:25,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:45:25,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:45:25,753 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 15:45:25,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:45:25,838 INFO L206 MainTranslator]: Completed translation [2023-11-23 15:45:25,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25 WrapperNode [2023-11-23 15:45:25,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:45:25,840 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 15:45:25,840 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 15:45:25,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 15:45:25,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,866 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,906 INFO L138 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 144 [2023-11-23 15:45:25,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 15:45:25,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 15:45:25,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 15:45:25,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 15:45:25,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,921 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 15:45:25,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 15:45:25,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 15:45:25,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 15:45:25,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (1/1) ... [2023-11-23 15:45:25,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:45:25,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:25,994 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) [2023-11-23 15:45:26,021 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 [2023-11-23 15:45:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 15:45:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 15:45:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-23 15:45:26,060 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-23 15:45:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 15:45:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 15:45:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 15:45:26,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 15:45:26,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 15:45:26,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 15:45:26,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 15:45:26,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 15:45:26,222 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 15:45:26,225 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 15:45:26,547 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 15:45:26,592 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 15:45:26,593 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 15:45:26,593 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:26 BoogieIcfgContainer [2023-11-23 15:45:26,593 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 15:45:26,596 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 15:45:26,596 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 15:45:26,600 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 15:45:26,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:45:25" (1/3) ... [2023-11-23 15:45:26,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545f4f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:45:26, skipping insertion in model container [2023-11-23 15:45:26,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:25" (2/3) ... [2023-11-23 15:45:26,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545f4f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:45:26, skipping insertion in model container [2023-11-23 15:45:26,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:26" (3/3) ... [2023-11-23 15:45:26,603 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2023-11-23 15:45:26,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 15:45:26,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-23 15:45:26,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:45:26,677 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;@f037c8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:45:26,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-23 15:45:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 76 states have internal predecessors, (93), 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) [2023-11-23 15:45:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 15:45:26,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:26,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:45:26,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:26,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 222887514, now seen corresponding path program 1 times [2023-11-23 15:45:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:26,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254698348] [2023-11-23 15:45:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:26,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:45:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254698348] [2023-11-23 15:45:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254698348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:26,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:26,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:45:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020601861] [2023-11-23 15:45:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:26,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:45:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:45:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:45:26,987 INFO L87 Difference]: Start difference. First operand has 80 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 76 states have internal predecessors, (93), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:45:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:27,163 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-23 15:45:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:45:27,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 15:45:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:27,174 INFO L225 Difference]: With dead ends: 76 [2023-11-23 15:45:27,174 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 15:45:27,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:45:27,182 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:27,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 15:45:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-23 15:45:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.95) internal successors, (78), 70 states have internal predecessors, (78), 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) [2023-11-23 15:45:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-11-23 15:45:27,229 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 5 [2023-11-23 15:45:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:27,229 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-11-23 15:45:27,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:45:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-11-23 15:45:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 15:45:27,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:27,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:45:27,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 15:45:27,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:27,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 222887515, now seen corresponding path program 1 times [2023-11-23 15:45:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401874116] [2023-11-23 15:45:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:27,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:45:27,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:27,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401874116] [2023-11-23 15:45:27,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401874116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:27,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:45:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400636144] [2023-11-23 15:45:27,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:45:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:45:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:45:27,386 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:45:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:27,490 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-11-23 15:45:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:45:27,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 15:45:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:27,492 INFO L225 Difference]: With dead ends: 71 [2023-11-23 15:45:27,492 INFO L226 Difference]: Without dead ends: 71 [2023-11-23 15:45:27,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:45:27,493 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:27,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 114 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-23 15:45:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-23 15:45:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.875) internal successors, (75), 67 states have internal predecessors, (75), 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) [2023-11-23 15:45:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-11-23 15:45:27,511 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 5 [2023-11-23 15:45:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:27,511 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-11-23 15:45:27,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:45:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-11-23 15:45:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 15:45:27,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:27,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:27,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 15:45:27,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:27,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 211138607, now seen corresponding path program 1 times [2023-11-23 15:45:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000592366] [2023-11-23 15:45:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:45:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000592366] [2023-11-23 15:45:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000592366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:27,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:27,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 15:45:27,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472559133] [2023-11-23 15:45:27,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:45:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:45:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:45:27,684 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-23 15:45:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:27,796 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-11-23 15:45:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:45:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2023-11-23 15:45:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:27,807 INFO L225 Difference]: With dead ends: 82 [2023-11-23 15:45:27,808 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 15:45:27,810 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 [2023-11-23 15:45:27,812 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 10 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:27,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 160 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 15:45:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2023-11-23 15:45:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.853658536585366) internal successors, (76), 68 states have internal predecessors, (76), 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) [2023-11-23 15:45:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2023-11-23 15:45:27,827 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 11 [2023-11-23 15:45:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:27,828 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2023-11-23 15:45:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-23 15:45:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2023-11-23 15:45:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 15:45:27,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:27,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:27,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 15:45:27,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:27,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash -709309976, now seen corresponding path program 1 times [2023-11-23 15:45:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:27,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380022787] [2023-11-23 15:45:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:27,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:45:28,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:28,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380022787] [2023-11-23 15:45:28,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380022787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:28,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:28,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 15:45:28,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557549192] [2023-11-23 15:45:28,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:28,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:45:28,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:45:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:45:28,055 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:28,224 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-11-23 15:45:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:45:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-23 15:45:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:28,228 INFO L225 Difference]: With dead ends: 71 [2023-11-23 15:45:28,228 INFO L226 Difference]: Without dead ends: 71 [2023-11-23 15:45:28,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:28,239 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:28,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 248 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-23 15:45:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-23 15:45:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.829268292682927) internal successors, (75), 67 states have internal predecessors, (75), 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) [2023-11-23 15:45:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-11-23 15:45:28,249 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 19 [2023-11-23 15:45:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:28,249 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-11-23 15:45:28,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-11-23 15:45:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 15:45:28,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:28,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 15:45:28,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:28,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -709309975, now seen corresponding path program 1 times [2023-11-23 15:45:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91661282] [2023-11-23 15:45:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:28,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:28,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91661282] [2023-11-23 15:45:28,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91661282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:28,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:28,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 15:45:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341280896] [2023-11-23 15:45:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:45:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:45:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:45:28,701 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:28,846 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2023-11-23 15:45:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:45:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-23 15:45:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:28,848 INFO L225 Difference]: With dead ends: 70 [2023-11-23 15:45:28,848 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 15:45:28,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:28,849 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:28,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 268 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 15:45:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-23 15:45:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 66 states have internal predecessors, (74), 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) [2023-11-23 15:45:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-11-23 15:45:28,855 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 19 [2023-11-23 15:45:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:28,856 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-11-23 15:45:28,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-11-23 15:45:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 15:45:28,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:28,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:28,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 15:45:28,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:28,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1252912841, now seen corresponding path program 1 times [2023-11-23 15:45:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:28,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631617092] [2023-11-23 15:45:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:29,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:29,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:29,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631617092] [2023-11-23 15:45:29,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631617092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:29,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626580876] [2023-11-23 15:45:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:29,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:29,147 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) [2023-11-23 15:45:29,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 15:45:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:29,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:45:29,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:29,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:29,409 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-23 15:45:29,447 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-23 15:45:29,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-23 15:45:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-23 15:45:29,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:45:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626580876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:45:29,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:45:29,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 11 [2023-11-23 15:45:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243795192] [2023-11-23 15:45:29,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:29,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 15:45:29,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 15:45:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-11-23 15:45:29,645 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:29,865 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-11-23 15:45:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:45:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-23 15:45:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:29,867 INFO L225 Difference]: With dead ends: 77 [2023-11-23 15:45:29,867 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 15:45:29,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=116, Unknown=1, NotChecked=22, Total=182 [2023-11-23 15:45:29,868 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:29,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 316 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2023-11-23 15:45:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 15:45:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-11-23 15:45:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 70 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 15:45:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2023-11-23 15:45:29,882 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 21 [2023-11-23 15:45:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:29,882 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2023-11-23 15:45:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2023-11-23 15:45:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 15:45:29,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:29,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:30,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 15:45:30,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:30,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1252912842, now seen corresponding path program 1 times [2023-11-23 15:45:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:30,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458016251] [2023-11-23 15:45:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:30,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:30,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:30,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:30,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458016251] [2023-11-23 15:45:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458016251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:30,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983601602] [2023-11-23 15:45:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:30,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:30,545 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) [2023-11-23 15:45:30,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 15:45:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:30,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 15:45:30,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:30,698 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 [2023-11-23 15:45:30,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:30,825 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-23 15:45:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:30,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 15:45:30,866 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:30,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-23 15:45:30,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:30,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983601602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:30,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:30,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2023-11-23 15:45:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469323944] [2023-11-23 15:45:30,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 15:45:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 15:45:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2023-11-23 15:45:30,986 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 15 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:31,276 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-11-23 15:45:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:45:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-23 15:45:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:31,277 INFO L225 Difference]: With dead ends: 77 [2023-11-23 15:45:31,277 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 15:45:31,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-11-23 15:45:31,279 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:31,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 312 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2023-11-23 15:45:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 15:45:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-11-23 15:45:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 70 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 15:45:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2023-11-23 15:45:31,284 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 21 [2023-11-23 15:45:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:31,284 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2023-11-23 15:45:31,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2023-11-23 15:45:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 15:45:31,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:31,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:31,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:31,501 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,SelfDestructingSolverStorable6 [2023-11-23 15:45:31,502 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:31,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1458551455, now seen corresponding path program 1 times [2023-11-23 15:45:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632396760] [2023-11-23 15:45:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:31,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:31,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632396760] [2023-11-23 15:45:31,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632396760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031051850] [2023-11-23 15:45:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:31,700 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) [2023-11-23 15:45:31,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 15:45:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:31,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 15:45:31,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:31,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:31,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031051850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:45:31,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:45:31,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-23 15:45:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587934084] [2023-11-23 15:45:31,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:31,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:45:31,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:45:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:45:31,904 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 15:45:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:32,022 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-23 15:45:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:45:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 15:45:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:32,023 INFO L225 Difference]: With dead ends: 76 [2023-11-23 15:45:32,023 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 15:45:32,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:32,024 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 3 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:32,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 314 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 15:45:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2023-11-23 15:45:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 70 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 15:45:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-11-23 15:45:32,029 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 23 [2023-11-23 15:45:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:32,029 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-11-23 15:45:32,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 15:45:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-11-23 15:45:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 15:45:32,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:32,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:32,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:32,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:32,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:32,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:32,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2034325814, now seen corresponding path program 1 times [2023-11-23 15:45:32,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909078464] [2023-11-23 15:45:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:32,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:32,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 15:45:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909078464] [2023-11-23 15:45:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909078464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201553864] [2023-11-23 15:45:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:32,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:32,355 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) [2023-11-23 15:45:32,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 15:45:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:32,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 15:45:32,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:32,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:32,549 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-23 15:45:32,586 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-23 15:45:32,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-23 15:45:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-11-23 15:45:32,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:32,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201553864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:32,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:32,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2023-11-23 15:45:32,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083959384] [2023-11-23 15:45:32,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:32,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 15:45:32,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 15:45:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=89, Unknown=1, NotChecked=18, Total=132 [2023-11-23 15:45:32,645 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:32,867 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-23 15:45:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 15:45:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-11-23 15:45:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:32,868 INFO L225 Difference]: With dead ends: 76 [2023-11-23 15:45:32,868 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 15:45:32,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2023-11-23 15:45:32,869 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:32,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 304 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2023-11-23 15:45:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 15:45:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-23 15:45:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.711111111111111) internal successors, (77), 69 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 15:45:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-11-23 15:45:32,873 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 24 [2023-11-23 15:45:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:32,873 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-11-23 15:45:32,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-11-23 15:45:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 15:45:32,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:32,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:32,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:33,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:33,080 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:33,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2034325813, now seen corresponding path program 1 times [2023-11-23 15:45:33,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:33,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236543269] [2023-11-23 15:45:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:33,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:33,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:33,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:33,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236543269] [2023-11-23 15:45:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236543269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:33,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770596848] [2023-11-23 15:45:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:33,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:33,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:33,301 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) [2023-11-23 15:45:33,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 15:45:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:33,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 15:45:33,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:33,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:33,460 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 [2023-11-23 15:45:33,567 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-23 15:45:33,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:33,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 15:45:33,613 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:33,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-23 15:45:33,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:33,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770596848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:33,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:33,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-23 15:45:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068181469] [2023-11-23 15:45:33,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:33,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 15:45:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 15:45:33,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-11-23 15:45:33,770 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 16 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:34,043 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-11-23 15:45:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:45:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-11-23 15:45:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:34,046 INFO L225 Difference]: With dead ends: 91 [2023-11-23 15:45:34,047 INFO L226 Difference]: Without dead ends: 91 [2023-11-23 15:45:34,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=350, Unknown=1, NotChecked=38, Total=462 [2023-11-23 15:45:34,048 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 27 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:34,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 467 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2023-11-23 15:45:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-23 15:45:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2023-11-23 15:45:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 78 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-11-23 15:45:34,055 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 24 [2023-11-23 15:45:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-11-23 15:45:34,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-11-23 15:45:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 15:45:34,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:34,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:34,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:34,275 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,SelfDestructingSolverStorable9 [2023-11-23 15:45:34,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:34,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1360409211, now seen corresponding path program 1 times [2023-11-23 15:45:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:34,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028185008] [2023-11-23 15:45:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:34,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:45:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:34,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028185008] [2023-11-23 15:45:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028185008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 15:45:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876355755] [2023-11-23 15:45:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:34,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:45:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:45:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:34,475 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:34,626 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2023-11-23 15:45:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 15:45:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 15:45:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:34,627 INFO L225 Difference]: With dead ends: 85 [2023-11-23 15:45:34,627 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 15:45:34,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:45:34,628 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:34,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 282 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 15:45:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2023-11-23 15:45:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 77 states have internal predecessors, (90), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2023-11-23 15:45:34,632 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 25 [2023-11-23 15:45:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:34,632 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2023-11-23 15:45:34,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2023-11-23 15:45:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 15:45:34,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:34,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 15:45:34,634 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1360409212, now seen corresponding path program 1 times [2023-11-23 15:45:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565401086] [2023-11-23 15:45:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:34,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:34,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565401086] [2023-11-23 15:45:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565401086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:34,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 15:45:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72536340] [2023-11-23 15:45:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:45:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:45:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:34,872 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:35,020 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2023-11-23 15:45:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:45:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 15:45:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:35,021 INFO L225 Difference]: With dead ends: 82 [2023-11-23 15:45:35,021 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 15:45:35,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 15:45:35,022 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:35,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 302 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 15:45:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-23 15:45:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 76 states have internal predecessors, (89), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2023-11-23 15:45:35,025 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 25 [2023-11-23 15:45:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:35,025 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2023-11-23 15:45:35,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2023-11-23 15:45:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 15:45:35,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:35,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:35,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 15:45:35,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:35,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:35,027 INFO L85 PathProgramCache]: Analyzing trace with hash 644422841, now seen corresponding path program 1 times [2023-11-23 15:45:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:35,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229525374] [2023-11-23 15:45:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:35,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 15:45:35,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229525374] [2023-11-23 15:45:35,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229525374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:35,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:35,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 15:45:35,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083444252] [2023-11-23 15:45:35,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:35,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 15:45:35,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:35,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 15:45:35,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 15:45:35,150 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:35,245 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2023-11-23 15:45:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:45:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-23 15:45:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:35,247 INFO L225 Difference]: With dead ends: 103 [2023-11-23 15:45:35,247 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 15:45:35,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 15:45:35,248 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 104 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:35,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 206 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 15:45:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2023-11-23 15:45:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 79 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-11-23 15:45:35,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 28 [2023-11-23 15:45:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:35,251 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-11-23 15:45:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-11-23 15:45:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 15:45:35,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:35,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 15:45:35,253 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:35,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash 644422896, now seen corresponding path program 1 times [2023-11-23 15:45:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780375864] [2023-11-23 15:45:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:45:35,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:35,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780375864] [2023-11-23 15:45:35,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780375864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:35,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:35,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 15:45:35,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936266368] [2023-11-23 15:45:35,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:35,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:45:35,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:45:35,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:45:35,430 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:35,639 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-11-23 15:45:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 15:45:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-23 15:45:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:35,641 INFO L225 Difference]: With dead ends: 111 [2023-11-23 15:45:35,641 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 15:45:35,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:45:35,642 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:35,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 309 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 15:45:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 15:45:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2023-11-23 15:45:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 82 states have internal predecessors, (98), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-11-23 15:45:35,645 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 28 [2023-11-23 15:45:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:35,645 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-11-23 15:45:35,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-11-23 15:45:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 15:45:35,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:35,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 15:45:35,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:35,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 644422897, now seen corresponding path program 1 times [2023-11-23 15:45:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:35,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999144134] [2023-11-23 15:45:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:35,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:35,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999144134] [2023-11-23 15:45:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999144134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:35,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 15:45:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564835677] [2023-11-23 15:45:35,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:45:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:45:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:45:35,951 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:36,156 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2023-11-23 15:45:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:45:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-23 15:45:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:36,157 INFO L225 Difference]: With dead ends: 88 [2023-11-23 15:45:36,157 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 15:45:36,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:45:36,158 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 59 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:36,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 331 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 15:45:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 15:45:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 15:45:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.6) internal successors, (96), 82 states have internal predecessors, (96), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2023-11-23 15:45:36,161 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 28 [2023-11-23 15:45:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:36,161 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2023-11-23 15:45:36,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2023-11-23 15:45:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 15:45:36,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:36,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:36,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 15:45:36,162 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:36,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash 815257392, now seen corresponding path program 1 times [2023-11-23 15:45:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:36,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81674951] [2023-11-23 15:45:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:36,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:36,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81674951] [2023-11-23 15:45:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81674951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903032877] [2023-11-23 15:45:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:36,784 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) [2023-11-23 15:45:36,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 15:45:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:36,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 15:45:36,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:36,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:37,071 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:37,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:37,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:45:37,171 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:37,171 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-11-23 15:45:37,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 15:45:37,260 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 35 treesize of output 26 [2023-11-23 15:45:37,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:37,343 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 42 treesize of output 16 [2023-11-23 15:45:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:45:37,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:37,391 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2023-11-23 15:45:37,391 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 19 treesize of output 18 [2023-11-23 15:45:37,437 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1590 (Array Int Int))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1590) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2023-11-23 15:45:37,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:37,503 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-11-23 15:45:37,507 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 122 treesize of output 110 [2023-11-23 15:45:37,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 15:45:37,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:45:37,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903032877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:37,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:37,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2023-11-23 15:45:37,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405138580] [2023-11-23 15:45:37,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:37,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 15:45:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 15:45:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=883, Unknown=29, NotChecked=60, Total=1056 [2023-11-23 15:45:37,602 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 28 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:45:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:38,098 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-11-23 15:45:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 15:45:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-23 15:45:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:38,099 INFO L225 Difference]: With dead ends: 105 [2023-11-23 15:45:38,100 INFO L226 Difference]: Without dead ends: 105 [2023-11-23 15:45:38,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1251, Unknown=29, NotChecked=72, Total=1482 [2023-11-23 15:45:38,101 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:38,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 712 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 15:45:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-23 15:45:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2023-11-23 15:45:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.5735294117647058) internal successors, (107), 90 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2023-11-23 15:45:38,105 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 30 [2023-11-23 15:45:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:38,106 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2023-11-23 15:45:38,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:45:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2023-11-23 15:45:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 15:45:38,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:38,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:38,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:38,318 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 [2023-11-23 15:45:38,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:38,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 815257393, now seen corresponding path program 1 times [2023-11-23 15:45:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:38,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188996056] [2023-11-23 15:45:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:38,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188996056] [2023-11-23 15:45:39,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188996056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:39,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084467789] [2023-11-23 15:45:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:39,378 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) [2023-11-23 15:45:39,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 15:45:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:39,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-23 15:45:39,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:39,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:39,597 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 [2023-11-23 15:45:39,858 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 15:45:39,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-23 15:45:39,873 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:39,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:39,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-23 15:45:39,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:45:40,039 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:40,040 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2023-11-23 15:45:40,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-23 15:45:40,165 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 15:45:40,166 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 15:45:40,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:45:40,183 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:45:40,183 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 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 15:45:40,232 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 35 treesize of output 26 [2023-11-23 15:45:40,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 15:45:40,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 16 [2023-11-23 15:45:40,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-23 15:45:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:45:40,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:40,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:40,818 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2023-11-23 15:45:40,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:40,825 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-23 15:45:40,830 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 116 treesize of output 108 [2023-11-23 15:45:40,836 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 334 treesize of output 314 [2023-11-23 15:45:40,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-11-23 15:45:40,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-23 15:45:40,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-11-23 15:45:40,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-11-23 15:45:40,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:40,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-11-23 15:45:40,883 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:40,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-23 15:45:41,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084467789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:41,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:41,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2023-11-23 15:45:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420808699] [2023-11-23 15:45:41,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:41,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-23 15:45:41,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-23 15:45:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1767, Unknown=3, NotChecked=0, Total=1892 [2023-11-23 15:45:41,132 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 34 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:42,049 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-11-23 15:45:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 15:45:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-11-23 15:45:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:42,050 INFO L225 Difference]: With dead ends: 103 [2023-11-23 15:45:42,050 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 15:45:42,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=208, Invalid=2651, Unknown=3, NotChecked=0, Total=2862 [2023-11-23 15:45:42,052 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:42,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 871 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 15:45:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 15:45:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2023-11-23 15:45:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 87 states have internal predecessors, (101), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2023-11-23 15:45:42,055 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 30 [2023-11-23 15:45:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:42,055 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2023-11-23 15:45:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2023-11-23 15:45:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 15:45:42,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:42,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:42,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:42,268 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 [2023-11-23 15:45:42,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:42,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1778503655, now seen corresponding path program 2 times [2023-11-23 15:45:42,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:42,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415186245] [2023-11-23 15:45:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 15:45:42,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:42,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415186245] [2023-11-23 15:45:42,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415186245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:42,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:42,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 15:45:42,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482614175] [2023-11-23 15:45:42,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:42,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:45:42,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:45:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:45:42,402 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:42,523 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2023-11-23 15:45:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:45:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-11-23 15:45:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:42,526 INFO L225 Difference]: With dead ends: 111 [2023-11-23 15:45:42,527 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 15:45:42,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:45:42,527 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:42,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 206 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 15:45:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2023-11-23 15:45:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 90 states have internal predecessors, (104), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 15:45:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2023-11-23 15:45:42,531 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 32 [2023-11-23 15:45:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:42,531 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2023-11-23 15:45:42,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2023-11-23 15:45:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 15:45:42,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:42,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 15:45:42,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:42,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -142764124, now seen corresponding path program 1 times [2023-11-23 15:45:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660340541] [2023-11-23 15:45:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 15:45:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 15:45:42,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660340541] [2023-11-23 15:45:42,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660340541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538246379] [2023-11-23 15:45:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:42,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:42,651 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) [2023-11-23 15:45:42,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 15:45:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:42,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 15:45:42,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 15:45:42,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:45:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538246379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:42,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:45:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-23 15:45:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035921872] [2023-11-23 15:45:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:42,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:45:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:45:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 15:45:42,890 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:45:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:42,912 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-23 15:45:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:45:42,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-11-23 15:45:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:42,913 INFO L225 Difference]: With dead ends: 72 [2023-11-23 15:45:42,913 INFO L226 Difference]: Without dead ends: 72 [2023-11-23 15:45:42,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 15:45:42,914 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:42,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 109 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:45:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-23 15:45:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-23 15:45:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.530612244897959) internal successors, (75), 68 states have internal predecessors, (75), 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) [2023-11-23 15:45:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2023-11-23 15:45:42,918 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 34 [2023-11-23 15:45:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:42,918 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2023-11-23 15:45:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:45:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2023-11-23 15:45:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 15:45:42,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:42,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:42,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:43,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:43,141 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:43,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1324749028, now seen corresponding path program 1 times [2023-11-23 15:45:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690241304] [2023-11-23 15:45:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:43,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:43,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:43,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690241304] [2023-11-23 15:45:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690241304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557395182] [2023-11-23 15:45:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:43,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:43,291 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) [2023-11-23 15:45:43,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 15:45:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:43,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 15:45:43,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:43,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:43,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557395182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:45:43,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:45:43,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-11-23 15:45:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743273193] [2023-11-23 15:45:43,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:43,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 15:45:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 15:45:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 15:45:43,589 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:43,704 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2023-11-23 15:45:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:45:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 15:45:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:43,707 INFO L225 Difference]: With dead ends: 76 [2023-11-23 15:45:43,707 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 15:45:43,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:45:43,709 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 180 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:43,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 239 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 15:45:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2023-11-23 15:45:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 59 states have internal predecessors, (64), 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) [2023-11-23 15:45:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-11-23 15:45:43,713 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 35 [2023-11-23 15:45:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:43,713 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-11-23 15:45:43,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-11-23 15:45:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 15:45:43,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:43,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:43,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:43,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:43,929 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:43,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1326178837, now seen corresponding path program 1 times [2023-11-23 15:45:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:43,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809542029] [2023-11-23 15:45:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:44,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:44,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809542029] [2023-11-23 15:45:44,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809542029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:44,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792240651] [2023-11-23 15:45:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:44,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:44,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:44,044 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) [2023-11-23 15:45:44,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 15:45:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 15:45:44,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:44,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:44,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792240651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:45:44,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:45:44,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-11-23 15:45:44,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522351264] [2023-11-23 15:45:44,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:44,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:45:44,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:45:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:44,373 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:44,465 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2023-11-23 15:45:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:45:44,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 15:45:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:44,467 INFO L225 Difference]: With dead ends: 78 [2023-11-23 15:45:44,467 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 15:45:44,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:45:44,468 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:44,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 174 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 15:45:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-11-23 15:45:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.5) internal successors, (78), 67 states have internal predecessors, (78), 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) [2023-11-23 15:45:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2023-11-23 15:45:44,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 35 [2023-11-23 15:45:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:44,472 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2023-11-23 15:45:44,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:45:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2023-11-23 15:45:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 15:45:44,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:44,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:44,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:44,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-23 15:45:44,680 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:44,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1155811690, now seen corresponding path program 2 times [2023-11-23 15:45:44,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:44,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495794843] [2023-11-23 15:45:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:44,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 15:45:44,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:44,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495794843] [2023-11-23 15:45:44,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495794843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134272426] [2023-11-23 15:45:44,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:45:44,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:44,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:44,792 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) [2023-11-23 15:45:44,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 15:45:45,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 15:45:45,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:45:45,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 15:45:45,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 15:45:45,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:45:45,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134272426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:45,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:45:45,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-23 15:45:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155765495] [2023-11-23 15:45:45,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:45,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:45:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:45,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:45:45,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 15:45:45,068 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:45,123 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-11-23 15:45:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:45:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-11-23 15:45:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:45,126 INFO L225 Difference]: With dead ends: 79 [2023-11-23 15:45:45,126 INFO L226 Difference]: Without dead ends: 79 [2023-11-23 15:45:45,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:45:45,127 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 76 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:45,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 154 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:45:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-23 15:45:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2023-11-23 15:45:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.490566037735849) internal successors, (79), 68 states have internal predecessors, (79), 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) [2023-11-23 15:45:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2023-11-23 15:45:45,130 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 38 [2023-11-23 15:45:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:45,130 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2023-11-23 15:45:45,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2023-11-23 15:45:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 15:45:45,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:45,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:45,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:45,345 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,SelfDestructingSolverStorable21 [2023-11-23 15:45:45,346 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:45,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1155811635, now seen corresponding path program 1 times [2023-11-23 15:45:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:45,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038374848] [2023-11-23 15:45:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:45,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:45,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:45,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 15:45:45,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:45,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038374848] [2023-11-23 15:45:45,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038374848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866445561] [2023-11-23 15:45:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:45,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:45,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:45,460 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) [2023-11-23 15:45:45,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 15:45:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:45,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 15:45:45,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 15:45:45,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:45,785 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 15:45:45,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-23 15:45:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 15:45:45,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866445561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:45:45,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:45:45,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-23 15:45:45,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622038880] [2023-11-23 15:45:45,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:45,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 15:45:45,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:45,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 15:45:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 15:45:45,798 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:45,899 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2023-11-23 15:45:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:45:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-11-23 15:45:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:45,900 INFO L225 Difference]: With dead ends: 97 [2023-11-23 15:45:45,900 INFO L226 Difference]: Without dead ends: 97 [2023-11-23 15:45:45,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:45:45,902 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:45,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 176 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-23 15:45:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2023-11-23 15:45:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 72 states have internal predecessors, (87), 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) [2023-11-23 15:45:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-11-23 15:45:45,911 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 38 [2023-11-23 15:45:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:45,912 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-11-23 15:45:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-11-23 15:45:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 15:45:45,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:45,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:45,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:46,125 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,SelfDestructingSolverStorable22 [2023-11-23 15:45:46,126 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:46,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:46,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1155811634, now seen corresponding path program 1 times [2023-11-23 15:45:46,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:46,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909831667] [2023-11-23 15:45:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:46,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:46,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:45:46,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909831667] [2023-11-23 15:45:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909831667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:46,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:46,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 15:45:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735776699] [2023-11-23 15:45:46,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:46,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:45:46,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:45:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:45:46,471 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:46,638 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2023-11-23 15:45:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:45:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-11-23 15:45:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:46,639 INFO L225 Difference]: With dead ends: 76 [2023-11-23 15:45:46,639 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 15:45:46,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:45:46,640 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 43 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:46,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 294 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 15:45:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-23 15:45:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 72 states have internal predecessors, (84), 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) [2023-11-23 15:45:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2023-11-23 15:45:46,642 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 38 [2023-11-23 15:45:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:46,643 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2023-11-23 15:45:46,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2023-11-23 15:45:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 15:45:46,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:46,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:46,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-23 15:45:46,643 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:46,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:46,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1661649342, now seen corresponding path program 1 times [2023-11-23 15:45:46,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:46,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833862941] [2023-11-23 15:45:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:46,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:47,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:47,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:47,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833862941] [2023-11-23 15:45:47,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833862941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749793150] [2023-11-23 15:45:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:47,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:47,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:47,708 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) [2023-11-23 15:45:47,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 15:45:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:47,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-23 15:45:47,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:47,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:48,079 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:48,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:48,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:45:48,170 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:48,170 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-11-23 15:45:48,253 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:45:48,254 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 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 15:45:48,287 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 35 treesize of output 26 [2023-11-23 15:45:48,434 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:48,435 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2023-11-23 15:45:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:48,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:48,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 29 [2023-11-23 15:45:48,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:48,566 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 42 treesize of output 16 [2023-11-23 15:45:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:45:48,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:48,615 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3155 (Array Int Int))) (or (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3155) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1) (not (= v_ArrVal_3155 (let ((.cse0 (+ 8 |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_3155 .cse0))))))) is different from false [2023-11-23 15:45:48,656 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3154 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3154) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2023-11-23 15:45:48,662 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3154 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|) v_ArrVal_3154) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2023-11-23 15:45:48,670 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3154 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_3154) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2023-11-23 15:45:48,676 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3154 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse0 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_3154)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) 1)) is different from false [2023-11-23 15:45:48,686 INFO L349 Elim1Store]: treesize reduction 5, result has 86.8 percent of original size [2023-11-23 15:45:48,686 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 42 treesize of output 41 [2023-11-23 15:45:48,692 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3152 (Array Int Int)) (v_ArrVal_3154 (Array Int Int))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3152))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_3154))) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2023-11-23 15:45:48,755 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3151 (Array Int Int)) (v_ArrVal_3152 (Array Int Int)) (v_ArrVal_3154 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3151) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3152))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_3154))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) is different from false [2023-11-23 15:45:48,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:48,764 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-11-23 15:45:48,767 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 365 treesize of output 337 [2023-11-23 15:45:48,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 129 [2023-11-23 15:45:48,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 117 [2023-11-23 15:45:48,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-23 15:45:48,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749793150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:48,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:48,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2023-11-23 15:45:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009106584] [2023-11-23 15:45:48,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-23 15:45:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-23 15:45:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1445, Unknown=11, NotChecked=574, Total=2162 [2023-11-23 15:45:48,915 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 38 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:45:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:49,678 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2023-11-23 15:45:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 15:45:49,678 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-23 15:45:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:49,679 INFO L225 Difference]: With dead ends: 103 [2023-11-23 15:45:49,679 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 15:45:49,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=2071, Unknown=11, NotChecked=686, Total=2970 [2023-11-23 15:45:49,681 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 200 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:49,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 886 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 15:45:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 15:45:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2023-11-23 15:45:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 78 states have internal predecessors, (96), 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) [2023-11-23 15:45:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2023-11-23 15:45:49,684 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 40 [2023-11-23 15:45:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:49,685 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2023-11-23 15:45:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:45:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2023-11-23 15:45:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 15:45:49,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:49,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:49,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:49,886 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,SelfDestructingSolverStorable24 [2023-11-23 15:45:49,886 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:49,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1661649343, now seen corresponding path program 1 times [2023-11-23 15:45:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:49,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653310801] [2023-11-23 15:45:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:51,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:51,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:51,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:51,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653310801] [2023-11-23 15:45:51,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653310801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:51,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404589420] [2023-11-23 15:45:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:51,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:51,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:51,325 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) [2023-11-23 15:45:51,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 15:45:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:51,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-23 15:45:51,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:51,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:51,639 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 [2023-11-23 15:45:51,903 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 15:45:51,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-23 15:45:51,916 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:51,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:51,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-23 15:45:51,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:45:52,072 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:52,073 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2023-11-23 15:45:52,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 15:45:52,173 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 15:45:52,173 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 15:45:52,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:45:52,187 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:45:52,188 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 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 15:45:52,229 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 35 treesize of output 26 [2023-11-23 15:45:52,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 15:45:52,424 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:52,424 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 54 [2023-11-23 15:45:52,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 18 [2023-11-23 15:45:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:52,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2023-11-23 15:45:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:52,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-11-23 15:45:52,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-23 15:45:52,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-23 15:45:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:52,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:52,920 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|)) (.cse1 (+ 8 |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_3365 Int)) (<= 0 (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store .cse0 .cse1 v_ArrVal_3365)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_3363 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) .cse1 (select v_ArrVal_3363 .cse1)) v_ArrVal_3363)) (forall ((v_ArrVal_3365 Int)) (<= (+ 12 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store .cse0 .cse1 v_ArrVal_3365)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3363) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))) is different from false [2023-11-23 15:45:53,806 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_3354 (Array Int Int)) (v_ArrVal_3355 (Array Int Int)) (v_ArrVal_3357 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3357))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (or (< (+ (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) 8) 0) (forall ((v_ArrVal_3361 (Array Int Int)) (v_ArrVal_3362 (Array Int Int)) (v_ArrVal_3356 (Array Int Int)) (v_ArrVal_3360 Int)) (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3356))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (<= (+ (select (select (store (store .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse0 .cse2 v_ArrVal_3360)) .cse3 v_ArrVal_3361) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) 12) (select |c_#length| (select (select (store (store .cse4 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse5 .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) .cse3 v_ArrVal_3362) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))) (forall ((v_ArrVal_3354 (Array Int Int)) (v_ArrVal_3355 (Array Int Int)) (v_ArrVal_3357 (Array Int Int))) (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3357))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (or (forall ((v_ArrVal_3361 (Array Int Int)) (v_ArrVal_3356 (Array Int Int)) (v_ArrVal_3360 Int)) (<= 0 (+ (select (select (store (store .cse6 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse7 .cse2 v_ArrVal_3360)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_3361) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) 8))) (< (+ (select .cse7 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) 8) 0))))))) is different from false [2023-11-23 15:45:53,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:53,848 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 91 [2023-11-23 15:45:53,855 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 138 treesize of output 126 [2023-11-23 15:45:53,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:53,865 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-23 15:45:53,871 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 131 treesize of output 119 [2023-11-23 15:45:53,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-23 15:45:53,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-11-23 15:45:53,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-23 15:45:53,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-11-23 15:45:53,921 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,922 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:53,934 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 205 [2023-11-23 15:45:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,938 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:53,943 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 174 [2023-11-23 15:45:53,948 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,949 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,951 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 58 treesize of output 42 [2023-11-23 15:45:53,954 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:53,957 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 34 treesize of output 22 [2023-11-23 15:45:53,960 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 15:45:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404589420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:54,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:45:54,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 42 [2023-11-23 15:45:54,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068274104] [2023-11-23 15:45:54,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:45:54,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-23 15:45:54,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-23 15:45:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2773, Unknown=30, NotChecked=214, Total=3192 [2023-11-23 15:45:54,201 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 43 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:55,282 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-11-23 15:45:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 15:45:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2023-11-23 15:45:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:55,283 INFO L225 Difference]: With dead ends: 82 [2023-11-23 15:45:55,283 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 15:45:55,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=295, Invalid=3973, Unknown=30, NotChecked=258, Total=4556 [2023-11-23 15:45:55,285 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 115 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:55,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1060 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 15:45:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 15:45:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-11-23 15:45:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.467741935483871) internal successors, (91), 77 states have internal predecessors, (91), 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) [2023-11-23 15:45:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-11-23 15:45:55,288 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 40 [2023-11-23 15:45:55,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:55,288 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-11-23 15:45:55,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:45:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-11-23 15:45:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 15:45:55,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:55,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:55,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 15:45:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:55,501 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -882662682, now seen corresponding path program 2 times [2023-11-23 15:45:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515942602] [2023-11-23 15:45:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 15:45:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515942602] [2023-11-23 15:45:55,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515942602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:45:55,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:45:55,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 15:45:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705526837] [2023-11-23 15:45:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:45:55,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:45:55,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:45:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:45:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:45:55,638 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:45:55,706 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2023-11-23 15:45:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:45:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-11-23 15:45:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:45:55,707 INFO L225 Difference]: With dead ends: 69 [2023-11-23 15:45:55,707 INFO L226 Difference]: Without dead ends: 69 [2023-11-23 15:45:55,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 15:45:55,708 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 79 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:45:55,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 127 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:45:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-23 15:45:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-23 15:45:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 65 states have internal predecessors, (71), 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) [2023-11-23 15:45:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-11-23 15:45:55,712 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 42 [2023-11-23 15:45:55,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:45:55,712 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-11-23 15:45:55,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:45:55,712 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-11-23 15:45:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 15:45:55,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:45:55,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:45:55,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-23 15:45:55,713 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:45:55,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:45:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1594293171, now seen corresponding path program 1 times [2023-11-23 15:45:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:45:55,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099374356] [2023-11-23 15:45:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:45:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:57,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:45:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:57,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:45:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:57,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:45:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099374356] [2023-11-23 15:45:57,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099374356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:45:57,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512726329] [2023-11-23 15:45:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:45:57,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:45:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:45:57,596 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) [2023-11-23 15:45:57,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 15:45:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:45:57,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-23 15:45:57,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:45:57,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:45:58,123 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:45:58,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:45:58,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:45:58,255 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:58,256 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-11-23 15:45:58,354 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:45:58,354 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 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 15:45:58,366 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 26 treesize of output 21 [2023-11-23 15:45:58,374 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 [2023-11-23 15:45:58,573 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:45:58,573 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 70 [2023-11-23 15:45:58,580 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 25 treesize of output 17 [2023-11-23 15:45:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:58,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2023-11-23 15:45:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:58,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:58,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 37 [2023-11-23 15:45:58,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-23 15:45:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:45:58,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-11-23 15:45:58,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2023-11-23 15:45:58,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-23 15:45:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:45:58,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:45:59,098 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3691 (Array Int Int)) (v_ArrVal_3688 (Array Int Int)) (v_ArrVal_3690 Int)) (let ((.cse0 (+ 8 |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (or (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_3688 .cse0)) v_ArrVal_3688)) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3691) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3688) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) .cse0 v_ArrVal_3690)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) 1) (* |c_ULTIMATE.start_main_~len~0#1| 2))))) is different from false [2023-11-23 15:45:59,120 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int) (v_ArrVal_3691 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_ArrVal_3690 Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (= (+ (let ((.cse0 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_3691) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0 v_DerPreprocessor_4) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0 v_ArrVal_3690) |c_ULTIMATE.start_main_~s~0#1.offset|) 8))) 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)))) is different from false [2023-11-23 15:45:59,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:59,130 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2023-11-23 15:45:59,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:59,139 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 104 treesize of output 103 [2023-11-23 15:45:59,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-11-23 15:45:59,195 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_3686 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3686) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8) v_DerPreprocessor_4) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|)))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_3686 (Array Int Int)) (v_DerPreprocessor_4 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3686) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8) v_DerPreprocessor_4) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_3687 (Array Int Int)) (v_ArrVal_3690 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3687) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8) v_ArrVal_3690) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|)))) (= (+ |c_ULTIMATE.start_dll_circular_update_at_~data#1| 1) (* |c_ULTIMATE.start_main_~len~0#1| 2))) is different from false [2023-11-23 15:45:59,243 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_3687 (Array Int Int)) (v_ArrVal_3690 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3687) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8) v_ArrVal_3690) |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_3686 (Array Int Int)) (v_DerPreprocessor_4 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3686) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8) v_DerPreprocessor_4) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_3686 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3686) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_46| 8) v_DerPreprocessor_4) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse0)))) (= (+ |c_ULTIMATE.start_dll_circular_update_at_~data#1| 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)))) is different from false [2023-11-23 15:45:59,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:59,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-23 15:45:59,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:45:59,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-23 15:45:59,546 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3681 (Array Int Int))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3681) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) is different from false [2023-11-23 15:45:59,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:45:59,667 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-23 15:45:59,670 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 131 treesize of output 119 [2023-11-23 15:45:59,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-23 15:45:59,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-23 15:45:59,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-23 15:46:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-23 15:46:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512726329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:46:00,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:46:00,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 25] total 68 [2023-11-23 15:46:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194555129] [2023-11-23 15:46:00,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-23 15:46:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-23 15:46:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3633, Unknown=65, NotChecked=630, Total=4556 [2023-11-23 15:46:00,009 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 68 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 59 states have internal predecessors, (107), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 15:46:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:01,759 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-11-23 15:46:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 15:46:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 59 states have internal predecessors, (107), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-11-23 15:46:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:01,760 INFO L225 Difference]: With dead ends: 69 [2023-11-23 15:46:01,761 INFO L226 Difference]: Without dead ends: 69 [2023-11-23 15:46:01,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=416, Invalid=5701, Unknown=65, NotChecked=790, Total=6972 [2023-11-23 15:46:01,763 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 122 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:01,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1247 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1108 Invalid, 0 Unknown, 335 Unchecked, 0.7s Time] [2023-11-23 15:46:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-23 15:46:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-23 15:46:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 65 states have internal predecessors, (70), 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) [2023-11-23 15:46:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-11-23 15:46:01,765 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 43 [2023-11-23 15:46:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:01,765 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-11-23 15:46:01,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 59 states have internal predecessors, (107), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 15:46:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-11-23 15:46:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 15:46:01,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:01,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:01,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:01,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-23 15:46:01,985 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:01,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash -992804169, now seen corresponding path program 1 times [2023-11-23 15:46:01,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:01,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333939015] [2023-11-23 15:46:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:01,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:02,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:46:02,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333939015] [2023-11-23 15:46:02,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333939015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047971791] [2023-11-23 15:46:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:02,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:02,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:02,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 15:46:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:03,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 15:46:03,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:03,081 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 17 treesize of output 13 [2023-11-23 15:46:03,220 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 38 treesize of output 20 [2023-11-23 15:46:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 15:46:03,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:03,349 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 38 treesize of output 32 [2023-11-23 15:46:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 15:46:03,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047971791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:46:03,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:46:03,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 28 [2023-11-23 15:46:03,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323164705] [2023-11-23 15:46:03,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:03,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 15:46:03,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 15:46:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-11-23 15:46:03,382 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 28 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:46:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:03,836 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-23 15:46:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 15:46:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-11-23 15:46:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:03,837 INFO L225 Difference]: With dead ends: 73 [2023-11-23 15:46:03,837 INFO L226 Difference]: Without dead ends: 73 [2023-11-23 15:46:03,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 15:46:03,838 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 178 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:03,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 583 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 15:46:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-23 15:46:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-11-23 15:46:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 67 states have internal predecessors, (72), 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) [2023-11-23 15:46:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2023-11-23 15:46:03,841 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 47 [2023-11-23 15:46:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:03,841 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2023-11-23 15:46:03,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:46:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2023-11-23 15:46:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 15:46:03,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:03,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-23 15:46:04,059 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:04,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash -606368167, now seen corresponding path program 1 times [2023-11-23 15:46:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526539712] [2023-11-23 15:46:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:04,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:04,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 15:46:04,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:04,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526539712] [2023-11-23 15:46:04,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526539712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:04,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118042856] [2023-11-23 15:46:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:04,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:04,177 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:04,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 15:46:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:04,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 15:46:04,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:04,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:46:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 15:46:04,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:46:04,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118042856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:46:04,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:46:04,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 10 [2023-11-23 15:46:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947641446] [2023-11-23 15:46:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:46:04,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 15:46:04,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 15:46:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:46:04,610 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:04,768 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2023-11-23 15:46:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:46:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-11-23 15:46:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:04,769 INFO L225 Difference]: With dead ends: 88 [2023-11-23 15:46:04,769 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 15:46:04,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-23 15:46:04,769 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:04,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 178 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:46:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 15:46:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2023-11-23 15:46:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.3) internal successors, (78), 70 states have internal predecessors, (78), 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) [2023-11-23 15:46:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-11-23 15:46:04,772 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 49 [2023-11-23 15:46:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:04,772 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-11-23 15:46:04,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-11-23 15:46:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 15:46:04,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:04,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:04,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:04,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:04,980 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:04,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -606368166, now seen corresponding path program 1 times [2023-11-23 15:46:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101166387] [2023-11-23 15:46:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:05,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:05,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 15:46:05,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:05,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101166387] [2023-11-23 15:46:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101166387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:46:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:46:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 15:46:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169093089] [2023-11-23 15:46:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:46:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:46:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:46:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:46:05,286 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 10 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:05,458 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-23 15:46:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:46:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-11-23 15:46:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:05,459 INFO L225 Difference]: With dead ends: 72 [2023-11-23 15:46:05,459 INFO L226 Difference]: Without dead ends: 72 [2023-11-23 15:46:05,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:46:05,460 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:05,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 182 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:46:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-23 15:46:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-23 15:46:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.25) internal successors, (75), 68 states have internal predecessors, (75), 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) [2023-11-23 15:46:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2023-11-23 15:46:05,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 49 [2023-11-23 15:46:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:05,462 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2023-11-23 15:46:05,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2023-11-23 15:46:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 15:46:05,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:05,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:05,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-23 15:46:05,463 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:05,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash 894352911, now seen corresponding path program 2 times [2023-11-23 15:46:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173924605] [2023-11-23 15:46:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:05,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 15:46:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:05,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173924605] [2023-11-23 15:46:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173924605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753022825] [2023-11-23 15:46:05,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:46:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:05,629 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 15:46:06,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:46:06,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:46:06,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 15:46:06,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 15:46:06,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 15:46:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753022825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:46:06,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:46:06,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2023-11-23 15:46:06,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570128048] [2023-11-23 15:46:06,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:46:06,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:46:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:46:06,146 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:46:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:06,236 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-11-23 15:46:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:46:06,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-11-23 15:46:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:06,237 INFO L225 Difference]: With dead ends: 65 [2023-11-23 15:46:06,237 INFO L226 Difference]: Without dead ends: 65 [2023-11-23 15:46:06,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:46:06,238 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:06,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 155 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:46:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-23 15:46:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-23 15:46:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 61 states have internal predecessors, (67), 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) [2023-11-23 15:46:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-11-23 15:46:06,240 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 49 [2023-11-23 15:46:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:06,241 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-11-23 15:46:06,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:46:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-11-23 15:46:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 15:46:06,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:06,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:06,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:06,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:06,455 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:06,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1617510097, now seen corresponding path program 1 times [2023-11-23 15:46:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120509177] [2023-11-23 15:46:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:06,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 15:46:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120509177] [2023-11-23 15:46:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120509177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:46:06,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:46:06,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 15:46:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062330091] [2023-11-23 15:46:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:46:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:46:06,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:46:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:46:06,624 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:06,757 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-11-23 15:46:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:46:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-11-23 15:46:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:06,758 INFO L225 Difference]: With dead ends: 65 [2023-11-23 15:46:06,758 INFO L226 Difference]: Without dead ends: 65 [2023-11-23 15:46:06,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:46:06,759 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:06,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:46:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-23 15:46:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-23 15:46:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 61 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) [2023-11-23 15:46:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-11-23 15:46:06,761 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 50 [2023-11-23 15:46:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:06,761 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-11-23 15:46:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-11-23 15:46:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 15:46:06,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:06,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:06,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-23 15:46:06,762 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1395829680, now seen corresponding path program 1 times [2023-11-23 15:46:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213841915] [2023-11-23 15:46:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:06,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:06,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 15:46:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213841915] [2023-11-23 15:46:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213841915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523164065] [2023-11-23 15:46:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:06,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:06,953 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:06,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 15:46:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:07,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-23 15:46:07,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:07,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:46:07,451 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:46:07,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:46:07,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:46:07,541 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:07,541 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-11-23 15:46:07,597 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:46:07,598 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 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 15:46:07,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2023-11-23 15:46:07,782 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:07,783 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2023-11-23 15:46:07,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:07,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:07,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 29 [2023-11-23 15:46:08,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:08,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2023-11-23 15:46:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 15:46:08,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:08,345 INFO L349 Elim1Store]: treesize reduction 5, result has 86.8 percent of original size [2023-11-23 15:46:08,346 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 42 treesize of output 41 [2023-11-23 15:46:08,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:08,486 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-11-23 15:46:08,489 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 365 treesize of output 337 [2023-11-23 15:46:08,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 123 [2023-11-23 15:46:08,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 117 [2023-11-23 15:46:08,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-23 15:46:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523164065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:08,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:46:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 20] total 25 [2023-11-23 15:46:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922955997] [2023-11-23 15:46:08,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 15:46:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 15:46:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1355, Unknown=10, NotChecked=0, Total=1482 [2023-11-23 15:46:08,655 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 26 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:46:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:09,155 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-11-23 15:46:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 15:46:09,155 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-11-23 15:46:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:09,156 INFO L225 Difference]: With dead ends: 73 [2023-11-23 15:46:09,156 INFO L226 Difference]: Without dead ends: 73 [2023-11-23 15:46:09,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=1888, Unknown=10, NotChecked=0, Total=2070 [2023-11-23 15:46:09,157 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:09,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 361 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 15:46:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-23 15:46:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2023-11-23 15:46:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 61 states have internal predecessors, (67), 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) [2023-11-23 15:46:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-11-23 15:46:09,159 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 51 [2023-11-23 15:46:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:09,160 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-11-23 15:46:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 15:46:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-11-23 15:46:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 15:46:09,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:09,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:09,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:09,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:09,368 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:09,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1395829681, now seen corresponding path program 1 times [2023-11-23 15:46:09,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:09,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59617973] [2023-11-23 15:46:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:09,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:10,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:10,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:46:10,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:10,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59617973] [2023-11-23 15:46:10,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59617973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:10,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446108020] [2023-11-23 15:46:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:10,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:10,631 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:10,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 15:46:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:10,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-23 15:46:10,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:10,965 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 [2023-11-23 15:46:10,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:46:11,249 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:46:11,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:46:11,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 15:46:11,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:46:11,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-23 15:46:11,436 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:11,436 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2023-11-23 15:46:11,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-23 15:46:11,569 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 15:46:11,569 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 15:46:11,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:46:11,585 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:46:11,585 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 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 15:46:11,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2023-11-23 15:46:11,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 15:46:11,885 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:11,885 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 54 [2023-11-23 15:46:11,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 15:46:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:12,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:12,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2023-11-23 15:46:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:12,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 15:46:12,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-11-23 15:46:12,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-23 15:46:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 15:46:12,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:13,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:13,426 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2023-11-23 15:46:13,432 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 146 treesize of output 134 [2023-11-23 15:46:13,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 69 [2023-11-23 15:46:13,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2023-11-23 15:46:13,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:13,454 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 85 [2023-11-23 15:46:13,458 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 165 treesize of output 153 [2023-11-23 15:46:13,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 121 [2023-11-23 15:46:13,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 117 [2023-11-23 15:46:13,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-23 15:46:13,503 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:13,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 190 [2023-11-23 15:46:13,512 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:13,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 174 [2023-11-23 15:46:13,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2023-11-23 15:46:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,528 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:13,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-23 15:46:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446108020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:13,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:46:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 45 [2023-11-23 15:46:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632287172] [2023-11-23 15:46:13,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:13,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-23 15:46:13,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-23 15:46:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3353, Unknown=9, NotChecked=0, Total=3540 [2023-11-23 15:46:13,842 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 46 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:46:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:15,046 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2023-11-23 15:46:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 15:46:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2023-11-23 15:46:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:15,048 INFO L225 Difference]: With dead ends: 70 [2023-11-23 15:46:15,048 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 15:46:15,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=344, Invalid=5347, Unknown=9, NotChecked=0, Total=5700 [2023-11-23 15:46:15,050 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:15,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 527 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 15:46:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 15:46:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2023-11-23 15:46:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 62 states have internal predecessors, (67), 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) [2023-11-23 15:46:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-11-23 15:46:15,053 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 51 [2023-11-23 15:46:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:15,053 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-11-23 15:46:15,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:46:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-11-23 15:46:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 15:46:15,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:15,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:15,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:15,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-23 15:46:15,260 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:15,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash 321045749, now seen corresponding path program 1 times [2023-11-23 15:46:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024377624] [2023-11-23 15:46:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:15,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:15,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:15,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 15:46:15,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:15,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024377624] [2023-11-23 15:46:15,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024377624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:46:15,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:46:15,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 15:46:15,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421021692] [2023-11-23 15:46:15,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:46:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:46:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:46:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:46:15,477 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:15,639 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2023-11-23 15:46:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:46:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-11-23 15:46:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:15,640 INFO L225 Difference]: With dead ends: 65 [2023-11-23 15:46:15,640 INFO L226 Difference]: Without dead ends: 65 [2023-11-23 15:46:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:46:15,641 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 161 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:46:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-23 15:46:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-23 15:46:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 61 states have internal predecessors, (65), 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) [2023-11-23 15:46:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-23 15:46:15,643 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2023-11-23 15:46:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:15,643 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-23 15:46:15,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 15:46:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-23 15:46:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 15:46:15,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:15,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:15,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-23 15:46:15,644 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:15,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1362589166, now seen corresponding path program 1 times [2023-11-23 15:46:15,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:15,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376118460] [2023-11-23 15:46:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:15,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:16,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 15:46:16,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:16,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376118460] [2023-11-23 15:46:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376118460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:16,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826931791] [2023-11-23 15:46:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:16,610 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:16,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 15:46:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:16,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-23 15:46:16,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:16,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:46:17,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:46:17,110 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:46:17,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:46:17,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:46:17,224 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:17,224 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-23 15:46:17,320 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 15:46:17,320 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 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 15:46:17,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2023-11-23 15:46:17,501 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:17,501 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 42 [2023-11-23 15:46:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:17,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:17,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 29 [2023-11-23 15:46:17,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:17,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2023-11-23 15:46:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 15:46:17,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:18,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:18,318 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-11-23 15:46:18,321 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 185 treesize of output 169 [2023-11-23 15:46:18,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 133 [2023-11-23 15:46:18,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 127 [2023-11-23 15:46:18,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-23 15:46:18,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826931791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:18,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:46:18,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2023-11-23 15:46:18,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161014029] [2023-11-23 15:46:18,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:18,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-23 15:46:18,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-23 15:46:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2465, Unknown=6, NotChecked=0, Total=2652 [2023-11-23 15:46:18,514 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 38 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:46:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:19,396 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2023-11-23 15:46:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 15:46:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2023-11-23 15:46:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:19,397 INFO L225 Difference]: With dead ends: 67 [2023-11-23 15:46:19,397 INFO L226 Difference]: Without dead ends: 67 [2023-11-23 15:46:19,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=316, Invalid=3710, Unknown=6, NotChecked=0, Total=4032 [2023-11-23 15:46:19,399 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:19,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 423 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 15:46:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-23 15:46:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-11-23 15:46:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 62 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) [2023-11-23 15:46:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-11-23 15:46:19,402 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 53 [2023-11-23 15:46:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:19,402 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-11-23 15:46:19,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 15:46:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-11-23 15:46:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 15:46:19,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:19,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:19,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:19,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-23 15:46:19,612 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:19,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:19,613 INFO L85 PathProgramCache]: Analyzing trace with hash -618079858, now seen corresponding path program 1 times [2023-11-23 15:46:19,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:19,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148365871] [2023-11-23 15:46:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:19,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:20,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:20,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 15:46:20,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148365871] [2023-11-23 15:46:20,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148365871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027385807] [2023-11-23 15:46:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:20,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:20,387 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:20,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 15:46:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:20,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-23 15:46:20,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:20,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:46:20,790 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:46:20,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:46:20,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:46:20,848 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:20,848 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-11-23 15:46:20,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 15:46:20,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-23 15:46:20,996 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:20,997 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2023-11-23 15:46:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:21,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:21,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:21,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2023-11-23 15:46:21,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:21,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 27 [2023-11-23 15:46:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 15:46:21,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:21,295 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5438 (Array Int Int))) (or (not (= v_ArrVal_5438 (let ((.cse0 (+ 8 |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_5438 .cse0))))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_5438) |c_ULTIMATE.start_main_~s~0#1.base|) 0) |c_ULTIMATE.start_main_~s~0#1.base|)))) is different from false [2023-11-23 15:46:21,352 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_9 Int) (v_ArrVal_5437 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| Int)) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_5437) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| 8) v_DerPreprocessor_9) 0) |c_ULTIMATE.start_main_~s~0#1.base|)) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-23 15:46:23,508 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_9 Int) (v_ArrVal_5437 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| Int)) (or (not (= (select (store (select (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse0 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_5437)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| 8) v_DerPreprocessor_9) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2023-11-23 15:46:23,519 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_9 Int) (v_ArrVal_5434 (Array Int Int)) (v_ArrVal_5437 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| Int)) (or (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_5434))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_5437))) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| 8) v_DerPreprocessor_9) 0))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2023-11-23 15:46:23,537 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_9 Int) (v_ArrVal_5434 (Array Int Int)) (v_ArrVal_5437 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| Int)) (or (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_5434))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_5437))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| 8) v_DerPreprocessor_9) 0) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2023-11-23 15:46:23,548 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5433 (Array Int Int)) (v_DerPreprocessor_9 Int) (v_ArrVal_5434 (Array Int Int)) (v_ArrVal_5437 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| Int)) (or (not (= (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_5433) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_5434))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_5437))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| 8) v_DerPreprocessor_9) 0) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_70| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2023-11-23 15:46:23,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:23,564 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 74 [2023-11-23 15:46:23,568 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 226 treesize of output 218 [2023-11-23 15:46:23,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:23,582 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 299 treesize of output 296 [2023-11-23 15:46:23,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:23,600 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 314 treesize of output 314 [2023-11-23 15:46:23,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:23,622 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 387 treesize of output 388 [2023-11-23 15:46:23,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 305 [2023-11-23 15:46:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 5 not checked. [2023-11-23 15:46:24,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027385807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:46:24,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:46:24,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 24] total 53 [2023-11-23 15:46:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382567971] [2023-11-23 15:46:24,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:46:24,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-23 15:46:24,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:46:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-23 15:46:24,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1982, Unknown=32, NotChecked=570, Total=2756 [2023-11-23 15:46:24,282 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 53 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 46 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:46:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:46:25,217 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-11-23 15:46:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 15:46:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 46 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2023-11-23 15:46:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:46:25,218 INFO L225 Difference]: With dead ends: 64 [2023-11-23 15:46:25,218 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 15:46:25,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=249, Invalid=2713, Unknown=32, NotChecked=666, Total=3660 [2023-11-23 15:46:25,219 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 152 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 15:46:25,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 524 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1003 Invalid, 0 Unknown, 332 Unchecked, 0.6s Time] [2023-11-23 15:46:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 15:46:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-11-23 15:46:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 59 states have internal predecessors, (62), 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) [2023-11-23 15:46:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2023-11-23 15:46:25,222 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 55 [2023-11-23 15:46:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:46:25,222 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2023-11-23 15:46:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 46 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 15:46:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2023-11-23 15:46:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 15:46:25,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:46:25,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:46:25,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-23 15:46:25,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-23 15:46:25,436 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-23 15:46:25,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:46:25,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1158100289, now seen corresponding path program 1 times [2023-11-23 15:46:25,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:46:25,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089218298] [2023-11-23 15:46:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:25,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:46:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:26,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 15:46:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 15:46:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 15:46:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:46:26,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089218298] [2023-11-23 15:46:26,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089218298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:46:26,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24580631] [2023-11-23 15:46:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:46:26,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:46:26,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:46:26,886 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:46:26,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 15:46:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:46:27,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-23 15:46:27,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:46:27,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 15:46:27,369 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 15:46:27,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 15:46:27,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:46:27,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 15:46:27,505 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 15:46:27,505 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2023-11-23 15:46:27,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 15:46:27,608 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-23 15:46:27,609 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 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 15:46:27,621 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-23 15:46:27,621 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 1 case distinctions, treesize of input 27 treesize of output 22 [2023-11-23 15:46:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:27,681 INFO L349 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2023-11-23 15:46:27,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 83 [2023-11-23 15:46:27,693 INFO L349 Elim1Store]: treesize reduction 31, result has 26.2 percent of original size [2023-11-23 15:46:27,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 81 [2023-11-23 15:46:28,007 INFO L349 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2023-11-23 15:46:28,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 125 treesize of output 103 [2023-11-23 15:46:28,038 INFO L349 Elim1Store]: treesize reduction 150, result has 10.7 percent of original size [2023-11-23 15:46:28,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 49 [2023-11-23 15:46:28,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:46:28,227 INFO L349 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2023-11-23 15:46:28,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 44 [2023-11-23 15:46:28,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-23 15:46:28,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:46:28,542 INFO L349 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2023-11-23 15:46:28,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 39 [2023-11-23 15:46:28,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:28,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-23 15:46:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 15:46:28,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:46:48,511 INFO L349 Elim1Store]: treesize reduction 51, result has 45.7 percent of original size [2023-11-23 15:46:48,512 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 40309 treesize of output 30949 [2023-11-23 15:46:48,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:48,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8531 treesize of output 8145 [2023-11-23 15:46:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:48,856 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:48,858 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:46:49,635 INFO L349 Elim1Store]: treesize reduction 474, result has 27.7 percent of original size [2023-11-23 15:46:49,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 6 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 4187 treesize of output 4312 [2023-11-23 15:46:50,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:50,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-11-23 15:46:50,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:46:50,538 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 206 treesize of output 202 [2023-11-23 15:46:50,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 154 [2023-11-23 15:47:05,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:47:07,180 INFO L349 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2023-11-23 15:47:07,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2098 treesize of output 2100 [2023-11-23 15:47:15,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 137 [2023-11-23 15:48:24,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:24,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:24,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:48:24,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 403 treesize of output 421 [2023-11-23 15:48:25,603 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:25,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:25,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:48:25,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 420 treesize of output 439 [2023-11-23 15:48:25,983 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:25,984 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:25,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:25,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:26,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:48:26,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 77 [2023-11-23 15:48:26,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:26,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:26,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2023-11-23 15:48:43,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:48:43,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27219 treesize of output 27108 [2023-11-23 15:48:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:48:55,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:48:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:48:55,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:48:55,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 39 [2023-11-23 15:48:55,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2023-11-23 15:48:57,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:57,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:48:57,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 15:48:57,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 18851 treesize of output 18894 Killed by 15